Unbiased Nutrabio Grass Fed Whey Isolate Review

This Nutrabio Grass Fed Whey Isolate review comes from a subscriber request on my YouTube channel. I’ve reviewed Nutrabio Isolate before and appreciated their transparency, but at $68 a tub, transparency alone isn’t enough—I expect quality to match the price. With Nutrabio Grass Fed Whey Isolate, you’re paying a premium for a product that doesn’t deliver on protein quality.

🔑 Nutrabio Grass Fed Whey Isolate Review TLDR

Transparency & Sourcing:
Nutrabio Grass Fed Whey Isolate is 90% Truly Grass Fed—the remaining 10% is unverified. It’s sourced from Irish dairy farms under the Truly Grass Fed certification but doesn’t meet the 95%+ standard required for full verification. Nutrabio provides batch testing through CheckMySupps.com but does not supply a Certificate of Analysis (COA) when requested.

Nutrition Facts:
Each scoop delivers 25g of protein and 2.6g of leucine, less than the 3g threshold needed for optimal muscle protein synthesis (MPS). The formula is mostly cold-processed and does not contain artificial fillers but does not include digestive enzymes or probiotics.

Value:
At $2.34 per serving, it’s the most expensive Truly Grass Fed isolate I’ve reviewed. With lower leucine content and an incomplete grass-fed claim, better value options exist.

Final Grade:
78% – Good Buy. Nutrabio Grass Fed Whey Isolate is transparent but ranks last among Truly Grass Fed options. You’re better off with AGN Roots, Earth Fed Muscle, or Boba Tea Protein at this price.

🛡️ How I Approach This Nutrabio Grass Fed Review

🌟 As a certified strength and conditioning expert (NSCA) and nutrition specialist (CISSN), I’m here to provide straightforward, no-nonsense reviews that cut through the noise. Whether this Nutrabio Grass Fed Review or another protein breakdown, every review is based on hands-on experience to ensure the product delivers on its promises.

👥 This Nutrabio Grass Fed Review stems from my interest or reader requests—never from sponsorships or brand influence. My reviews focus solely on product quality, and I’m not afraid to call out proteins that don’t meet the mark.

🔍 Transparency is at the heart of every review. While affiliate links may be included, my opinions remain 100% independent. Like all my content, this Nutrabio Grass Fed Review prioritizes your health and wellness.

📖 This Nutrabio Grass Fed Review dives into key product details, covering ingredients, sourcing, and transparency. I also evaluate essential factors like taste, mixability, and protein content so you know exactly what you’re getting before purchasing.

💼 My goal with this Nutrabio Grass Fed Review is simple: to make it straightforward and practical. After reading, you’ll have all the necessary information to decide if it meets your needs and goals. That’s what honest, unbiased reviews are all about.

📖 Nutrabio Grass Fed Whey Isolate Review Details

Nutrabio Grass Fed Whey Isolate is marketed as a premium Truly Grass Fed protein, but only 90% of its whey meets that standard. The remaining 10% is from an unknown source, making it a blended product rather than a fully verified grass-fed isolate. Its leucine content is 10.4%, the same as Optimum Nutrition Gold Standard Whey—a standard whey blend, not a premium grass-fed option. In contrast, AGN Roots (11.73%) and Earth Fed Muscle (11.6%) offer higher leucine percentages with full Truly Grass Fed certification. 

While Nutrabio provides batch testing results on CheckMySupps.com, it did not provide a Certificate of Analysis or confirm full sourcing transparency when asked. At $67.99 per tub ($2.34 per serving), it’s one of the most expensive Truly Grass Fed proteins yet lacks the highest verification standards. Transparency is there, but better value options exist at a lower cost.

💪 After Training Shake: How Many Scoops of Nutrabio Grass Fed to Stimulate Muscle Protein Synthesis?

Research suggests that to stimulate muscle protein synthesis (MPS), you need at least 25g of protein and up to 3g of leucine per scoop. Nutrabio Grass Fed Whey delivers 25g of protein and 2.6g of leucine per scoop, just short of the ideal leucine threshold.

To fully trigger MPS:

• With water – You’ll need 1.15 scoops to hit 3g of leucine.
• With high-protein skim milk: Mix 0.65 scoops with 1 cup of HP skim milk (USDA data share HP skim milk has 13g protein and 1.3g leucine). This will get you past the MPS threshold while conserving your expensive tub of protein.

HP skim milk is smarter if you want to stretch your container without sacrificing muscle growth.

🔑 Where to Buy Nutrabio Grass Fed Whey Protein Isolate TLDR

If you’re buying Nutrabio Grass Fed Isolate for the first time, I strongly recommend purchasing directly from Nutrabio. Why? Their Forever & A Day Guarantee.

Suppose you’re not a fan of mild-tasting protein (or discover that the protein quality is comparable to Optimum Nutrition Gold Standard Whey like I did). In that case, Nutrabio’s 90-day return policy has you covered.

However, if you already like Nutrabio’s flavors, Amazon offers a better deal. Prime members get free two-day shipping, making it cheaper than buying directly.

🛒 Where to Buy Nutrabio Grass Fed Whey Protein Isolate

You can purchase Nutrabio Grass Fed Whey Isolate directly from Nutrabio or Amazon. For full disclosure, I bought my review container directly from Nutrabio to take advantage of their Forever & A Day Guarantee. Below is a breakdown of the pricing and perks for both options.

Buying from Nutrabio

Purchasing directly from Nutrabio comes with a few added benefits:

• Payment plan option (four interest-free payments)
• Loyalty rewards for future purchases
• Forever & A Day Guarantee
• 10% Subscribe & Save (S&S) discount

Regardless of whether you choose a one-time purchase or S&S, shipping is $6 unless your order exceeds $99, which qualifies for free shipping.

Price Breakdown:

• $67.99 for 29 servings ($2.34 per serving)
• S&S price: $2.11 per serving

Buying from Amazon

Amazon offers some convenience perks, including:

• Free two-day shipping for Prime members
• 10% Subscribe & Save (S&S) discount

Price Breakdown (Same as Nutrabio):

• $67.99 for 29 servings ($2.34 per serving)
• S&S price: $2.11 per serving

If you value faster shipping, Amazon is the better choice. If you want loyalty rewards or the Forever & A Day Guarantee, buying directly from Nutrabio makes more sense.

💸 Does Nutrabio Have A Money Back Guarantee

🔑 Is Nutrabio Truly Grass Fed Whey Amino Spiked? TLDR

No, Nutrabio Truly Grass Fed Whey isn’t amino spiked—but that doesn’t mean it’s flawless. While no cheap fillers like glycine or taurine inflate the protein content, the 10.4% leucine raises some questions.

For a premium-priced Truly Grass Fed whey isolate, you’d expect a leucine percentage in the 11-12% range, like AGN Roots (11.73%) or Earth Fed Muscle (11.6%). Instead, Nutrabio’s leucine levels are identical to Optimum Nutrition Gold Standard Whey—a standard whey blend, not a premium grass-fed isolate.

So, while not amino-spiked, the lower leucine content and 90% grass-fed formulation suggest you’re paying for a blended product, not a 100% Grass Fed whey isolate.

⚛️ Is Nutrabio Truly Grass Fed Whey Amino Spiked?

No, Nutrabio Truly Grass Fed Whey is not amino spiked—but there’s a caveat.

Amino spiking happens when companies artificially boost protein content using cheap, non-proteinogenic amino acids like glycine, taurine, or creatine. Nutrabio doesn’t do that. Their amino acid profile reflects naturally occurring whey proteins, with no added fillers inflating the numbers.

But here’s where things get tricky. Leucine, the key BCAA for muscle growth, sits at 10.4%. That’s lower than AGN Roots (11.73%), and Earth Fed Muscle (11.6%), which are fully Truly Grass Fed verified. The drop suggests that not all Nutrabio’s whey isolate meets the highest grass-fed standard.

Since only 90% of Nutrabio’s protein is Truly Grass Fed, the remaining 10% is unaccounted for—which could explain the slightly lower leucine content. It’s not amino spiking, but it does raise questions about protein quality. If you’re paying $68 per tub, you should get 100% grass-fed protein, not a blend.

If you want 100% Truly Grass Fed with full transparency, AGN Roots and Earth Fed Muscle are better choices at a lower cost per serving.

Amino Spiking: 10 out of 10.
Nutrabio Truly Grass Fed Whey is not amino-spiked. However, the product description page has a few eye-catching details worth noting.

The biggest red flag? Its leucine content is identical to Optimum Nutrition Gold Standard Whey—a standard whey blend, not a premium grass-fed isolate. If you’re paying $68 per tub, you’d expect a higher leucine percentage, especially compared to top-tier grass-fed isolates like AGN Roots (11.73%) and Earth Fed Muscle (11.6%).

For a protein marketed as premium grass-fed, matching the amino acid profile of a mainstream whey blend is not the reassurance you want at this price point. If you’re investing in Truly Grass Fed Whey, the expectation is a superior leucine profile—not the same as a budget-friendly blend.

🔑 Are Nutrabio Proteins 3rd Party Tested? TLDR

Nutrabio provides batch testing results on CheckMySupps.com, verifying label accuracy, amino acid content, and contaminants—a step most brands skip. However, when I requested deeper verification on sourcing, full grass-fed certification, and a Certificate of Analysis (COA), my request was escalated and closed without answers.

The takeaway? NutraBio offers third-party testing, but full transparency is lacking, especially at the $68 price tag. Critical sourcing details remain unclear without a COA on request or additional certifications like NSF Certified for Sport or Informed Choice.

Transparency has limits.

📜 Are Nutrabio Proteins 3rd Party Tested?

✅ Is Nutrabio Grass-Fed Whey Certified Grass-Fed?

Truly Grass Fed is a recognized brand and certification, but Nutrabio’s specific product formulation does not fully meet its highest standard.

Here’s why:

Truly Grass Fed sets a minimum requirement that 95% of a cow’s diet must come from forage (grass, hay, silage). However, Nutrabio openly states that only 90% of their whey comes from grass-fed cows, meaning 10% of the protein is sourced from non-grass-fed dairy.

So, while Truly Grass Fed™ is a legitimate certification, Nutrabio’s use is incomplete. Other Truly Grass Fed Whey brands, like AGN Roots and Earth Fed Muscle, meet the full 95%+ requirement, whereas Nutrabio’s formulation falls short.

That 10% discrepancy might not seem like a big deal, but if you’re paying $68 per tub, you’d expect 100% Truly Grass Fed whey isolate, not a blend.

At this price point, Nutrabio is more transparent than many brands. Still, it does not meet the highest Truly Grass Fed standards, making it a weaker option than fully verified competitors like AGN Roots, Earth Fed Muscle, and Boba Nutrition.

🌱 Is Nutrabio Legit? 

🍃 Grass Fed Whey Protein Isolate Reviews

Not all grass-fed whey protein isolates are created equal. Some brands slap on the grass-fed label without real verification, while others back up their claims with third-party certifications and full transparency.

I’ve reviewed the biggest names in the space, comparing protein quality, sourcing transparency, leucine content, and price per serving. If you’re looking for a truly grass-fed whey isolate, check out my full breakdown here: Grass Fed Whey Protein Isolate Reviews.

✅ Certified Grass Fed Whey Protein

Suppose you’re looking for certified grass-fed whey protein, not just marketing buzz. In that case, you need brands with verified third-party certifications like Truly Grass Fed, USDA Organic, or New Zealand Dairy Standards.

I’ve reviewed top-certified options that meet these standards, breaking down their sourcing, transparency, and amino acid profiles. For USDA Organic-certified whey, check out my review here: USDA Organic Whey Protein Powder. If you’re interested in New Zealand’s high-quality dairy standards, see my full breakdown: New Zealand Protein Powder.

🔑 Protein Powder Comparison TLDR

If you’re looking for the best grass-fed whey protein based on protein content, leucine levels, and value, here’s the breakdown:

• Transparent Labs Protein vs. Nutrabio: Transparent Labs offers more protein per serving (28g vs. 25g), but its grass-fed claims lack certification. Nutrabio is more transparent, but its Truly Grass Fed whey is only 90% grass-fed.
• Muscle Feast vs. Nutrabio: Muscle Feast is cheaper, at $1.38 per serving, compared to Nutrabio’s $2.34. However, Nutrabio provides clearer details on sourcing, while Muscle Feast relies on European dairy without certification.
• Nutrabio vs AGN Roots – AGN Roots dominates with 3.05g of leucine per serving and a lower cost per serving ($1.49 vs. $2.34). While AGN Roots is fully certified, Nutrabio’s 90% grass-fed claim is questionable.

Where Does Nutrabio Rank Among Truly Grass Fed Proteins?

It ranks last, and here’s why: Nutrabio’s 90% grass-fed sourcing falls short compared to AGN Roots, Earth Fed Muscle, and Boba Nutrition—all fully certified and delivering higher verified leucine content. With its $70 price tag and an incomplete grass-fed claim, Nutrabio is a tough sell for a Truly Grass Fed Whey Protein.

📊 Protein Powder Comparison

Separating marketing hype from actual value is critical for grass-fed, high-quality whey protein. This section compares Nutrabio against three well-known competitors—Transparent Labs, Muscle Feast, and AGN Roots—to determine which brand delivers the best protein content, leucine concentration, and cost-effectiveness.

Each comparison breaks down protein per serving, leucine per gram, and price per serving to give you a clear, no-nonsense assessment of which protein powder is worth your money.

🐄🌱 Truly Grass Fed Protein Comparison

After comparing Nutrabio to these three brands, the final section evaluates every Truly Grass Fed-certified protein powder reviewed by JKremmer Fitness. This deep dive looks beyond branding and label claims, analyzing key factors like:

• Protein quality per serving
• Leucine content (essential for muscle growth)
• Leucine percentage relative to total protein

By the end of this section, you’ll have a clear, data-backed understanding of where Nutrabio and its competitors stand—and whether they hold up against certified Truly Grass Fed options.

🆚 Whey Protein Powder Comparison: Transparent Labs Protein vs Nutrabio

When comparing Transparent Labs Protein vs Nutrabio, both brands market their whey as premium, grass-fed, and clean. However, there are key differences in sourcing, transparency, and overall value.

Transparent Labs Grass-Fed Whey
Transparent Labs offers a whey protein isolate with 28g of protein per serving and minimal additives. It’s advertised as hormone-free and sourced from American dairy farms but lacks third-party certification for its grass-fed claims. The brand does have Labdoor and Informed Choice certifications, which verify quality and purity. Still, without a Truly Grass-Fed or USDA Organic seal, there’s no verification of its sourcing.

Nutrabio Grass-Fed Whey
Nutrabio’s Grass-Fed Whey Protein Isolate discloses exact ingredient dosages, amino acid content, and third-party testing results. However, it’s labeled under Supplement Facts instead of Nutrition Facts, allowing more flexibility in transparency. While Nutrabio provides full-label disclosure—ensuring no proprietary blends—the 90% grass-fed claim means 10% of its whey is not Truly Grass Fed. Each serving delivers 25g of protein with 10.4% leucine, lower than some competitors in the Truly Grass Fed category.

Bottom Line
In the Transparent Labs Protein vs Nutrabio debate, Transparent Labs offers higher protein per serving, but its lack of verified grass-fed certification raises sourcing concerns. Nutrabio provides a fully transparent label and amino acid breakdown, ensuring buyers know exactly what they’re getting.

For a deeper breakdown, check out my full Transparent Labs Grass Fed Whey Review. If you’re ready to buy, grab Transparent Labs Grass Fed Whey on Amazon.

Comparison Metrics	Nutrabio Grass Fed Ice Cream Cookie Dream	Transparent Labs French Vanilla
Leucine (g)	2.6	2.8
Leucine Percent (%)	10.4	10.00
Total BCAAs (g)	5.6	5.9
Protein per Serving (g)	25	28
Carbs per Serving (g)	2	1
Fiber per Serving (g)	0	0
Total Sugars (g)	2	1
Calories	110	130
Serving Size (g)	31.17	34.3
Number of Servings	29	30
Amazon Price	$67.99	$59.99
Price per Serving	$2.34	$2.00

🆚 Whey Protein Powder Comparison: Muscle Feast vs Nutrabio

When comparing Muscle Feast vs Nutrabio, both brands deliver high-quality, grass-fed whey protein isolates, but key differences set them apart. If you’re paying premium pricing, ingredient transparency, protein density, and overall value should be top priorities.

So, which one is worth your money?

Value
Regarding Muscle Feast vs Nutrabio, Muscle Feast Isolate dominates in affordability. At $1.38 per serving, it costs significantly less than Nutrabio’s $2.34 per serving. Muscle Feast also offers 94 servings per container, while Nutrabio only provides 29 servings per tub—meaning you get over 3x the servings for less money.

Transparency
Muscle Feast claims to be a grass-fed European dairy cow but lacks a certified grass-fed badge. Nutrabio uses Truly Grass Fed Whey, but only 90% of their whey is grass-fed—the rest is unknown.

Bottom Line
If you’re looking for the most cost-effective, minimally processed option, Muscle Feast Whey Isolate is the better value. But if you prefer Truly Grass Fed certification (despite it being only 90% grass-fed), Nutrabio Grass Fed Whey is still a solid pick.

Want a deeper dive into Muscle Feast’s quality? Check out my full review here.

Comparison Metrics	Nutrabio Grass Fed Ice Cream Cookie Dream	Muscle Feast Vanilla
Leucine (g)	2.6	2.5
Leucine Percent (%)	10.4	10
Total BCAAs (g)	5.6	5.5
Protein per Serving (g)	25	25
Carbs per Serving (g)	2	2
Fiber per Serving (g)	0	0
Total Sugars (g)	2	<1
Calories	110	110
Serving Size (g)	31.17	30
Number of Servings	29	94
Amazon Price	$67.99	$129.99
Price per Serving	$2.34	$1.38

🆚 Whey Protein Powder Comparison: Nutrabio vs AGN Roots

When comparing Nutrabio vs AGN Roots, the biggest takeaway is value for quality. Nutrabio offers transparency, but AGN Roots delivers better protein density, a higher leucine content, and superior third-party certifications—at a lower cost per serving.

Leucine & Protein Quality

Leucine plays a major role in muscle protein synthesis. In the Nutrabio vs. AGN Roots matchup, AGN Roots takes the lead with 3.05g per serving (11.73%), compared to Nutrabio’s 2.6g per serving (10.4%). The higher leucine content suggests a more robust amino acid profile, making AGN Roots the better choice for recovery and muscle retention.

Ingredient Transparency & Labeling

Both brands disclose full ingredient dosages and provide a complete amino acid profile, but Nutrabio’s 90% grass-fed claim raises concerns. If you’re paying a premium, why settle for a blended Truly Grass Fed whey when AGN Roots offers a 100% grass-fed option?

Bottom Line

Looking strictly at cost, AGN Roots dominates. With 47 servings at $1.49 per serving versus Nutrabio’s 29 servings at $2.34 per serving, AGN Roots provides better protein per dollar. In the battle of Nutrabio vs AGN Roots, it’s clear which protein delivers more for your money.

Check out my AGN Roots Grass Fed Whey Protein Review for a full breakdown. If you’re ready to buy, you can find AGN Roots on Amazon.

Comparison Metrics	Nutrabio Grass Fed Ice Cream Cookie Dream	AGN RootsUnflavored
Leucine (g)	2.6	3.05
Leucine Percent (%)	10.4	11.73
Total BCAAs (g)	5.6	6.5
Protein per Serving (g)	25	26
Carbs per Serving (g)	2	1
Fiber per Serving (g)	0	0
Total Sugars (g)	2	0
Calories	110	110
Serving Size (g)	31.17	29
Number of Servings	29	47
Amazon Price	$67.99	$69.99
Price per Serving	$2.34	$1.49

🐄🌱 Truly Grass Fed Protein Comparison: How Does Nutrabio Stack Up?

Check out my Truly Grass Fed Whey Protein reviews, and I provide a deep breakdown of all the Truly Grass Fed-certified whey isolates I’ve reviewed. 

If you’re looking for a verified grass-fed isolate, this chart highlights key differences between protein content, leucine levels, price per serving, and overall grade.

	Nutrabio Grass Fed Whey	Boba Tea Protein	Legion Protein	AGN Roots	Earth Fed Muscle	Marigold Protein Powder	Garden of Life Sport Protein
Protein per Serving (g)	25	25	28	25	25	26	24
Leucine Per Serving(g)	2.6	3.0	2.8	3.05	2.9	3.2	2.8
Leucine Percent	10.4	12.0	10.00	11.73	11.60	12.3	11.66
AmazonPrice	$67.99	$39.99	$58.49	$69.99	$59.99	$52.99	$38.95
Servings	29	19	30	47	30	31	20
Price per Serving	$2.34	$2.10	$2.00	$1.49	$2.00	$1.71	$1.95
Final Grade(Review Link)	78%	86%	81%	96%	93%	Final Review Not Up Yet	Final Review Not Up Yet

Leucine content varies across brands. AGN Roots delivers 3.05 grams per serving, leading the pack, while Marigold includes Non-GMO L-Glutamine as an added ingredient in its flavored versions but not in its unflavored protein. I have yet to confirm the exact amount, but it’s something to consider.

The price per serving also tells an interesting story. AGN Roots offers the best value at $1.49 per serving while check-marking all-important 3rd party certifications. On the other hand, Legion Protein remains the lowest-graded Truly Grass Fed isolate due to transparency issues and stevia flavoring concerns. Boba Tea Protein stands out for offering Asian-inspired flavors, but at $2.10 per serving, it’s on the higher end.

Garden of Life Sport Protein is marketed as a meal replacement lite. Each serving contains 2 grams of fiber and 2 billion CFU probiotics. Earth Fed Muscle’s protein and leucine content depend on the flavor selected, and stevia is its primary sweetener.

AGN Roots is the standard if you’re searching for the most well-rounded Truly Grass Fed isolate. Marigold and Garden of Life Sport are new additions, and I’ll update this section once their full reviews are published.

⭐️ Amazon Whey Protein Review: Nutrabio Grass Fed Review

If you’re considering Nutrabio Grass Fed Whey, the Amazon reviews paint a solid picture—200 verified buyers give it an impressive 4.6 out of 5 stars. Here’s what they loved about it:

• No digestive issues, thanks to cold filtration.
• Minimal, clean ingredient profile that mixes well.
• Top-tier transparency—Nutrabio lays out every detail so you know exactly what you’re getting.

When it comes to drawbacks, there aren’t many, but a few things stand out:

• No return policy (this is Amazon-specific).
• Flavor complaints—some say it’s overly sweet (monk fruit + stevia), while others find it too bland.
• Mixability issues—a handful of buyers reported occasional clumping.

So, what’s my take?

I agree with the bland flavor complaints—it’s not the most exciting protein. Once in a while, I run into minor shareability issues, but they’re not a dealbreaker. What sets Nutrabio apart is its robust third-party testing—it is one of the few brands that provides full transparency.

However, at this premium price, it’s the most expensive Truly Grass Fed protein on the market. Better value options offer higher quality at a lower cost.

That said, if you want a reliable, fully transparent brand, Nutrabio is one of the best in the business. I highly recommend any of their products for those who prioritize ingredient integrity.

🥤 How to Make Nutrabio Grass Fed Protein

Here’s how to make a Nutrabio Grass Fed Protein shake using a shaker bottle:

1. Pour 6 to 8 ounces of your preferred beverage.
2. Add one scoop of protein.
3. Shake for 25 to 30 seconds.

I’ve reviewed most of the Truly Grass Fed Whey Protein options, and for some reason, Nutrabio Grass Fed didn’t quite deliver. It mixes clean most of the time, but occasionally, I’ll get an odd batch where the powder clumps at the top of the shaker’s pour spout.

To avoid mixability issues, stick to the full 25 to 30-second shake—this protein doesn’t always dissolve as effortlessly as it should.

⚖️ Does Nutrabio Grass Fed Whey Come With A Scoop?

Nutrabio Grass Fed Protein comes with a scoop, and one scoop is about one serving. 

👌Does Nutrabio Grass Fed Whey Isolate Taste Good?

Regarding protein powders marketed with only natural, zero-calorie sweeteners, it’s a double-edged sword. So, how does Nutrabio Grass Fed Whey Isolate Ice Cream Cookie Dream hold up?

Before diving in, I expect a premium price to deliver a premium experience. I expect great taste, full transparency, and high-quality ingredients if a company charges top dollar.

Unfortunately, Nutrabio Grass Fed Whey Isolate falls short in the flavor department. With Ice Cream Cookie Dream, the focus leans heavily on the cream-filled center. I appreciate not having to chase soggy cookie bits at the bottom of my shaker, but the chocolate flavor is seriously lacking to complement the creamy flavor.

It’s a decent effort, but I expected more at $68 per tub.

Mixability: 8.5 out of 10
Out of all the Truly Grass Fed Whey Proteins I’ve reviewed, Nutrabio ranks at the bottom. Most of the time, it mixes well, but now and then, you’ll get an annoying batch where powder clumps stick together. For a premium-priced protein, that shouldn’t be an issue. 

🔑 Nutrabio Grass Fed Whey Protein Isolate Ingredient List; TLDR

Nutrabio Grass Fed Whey Protein Isolate keeps it clean—no artificial sweeteners, fillers, and full-label transparency. Every ingredient is listed with its exact dosage, a rarity in the supplement industry. But does that mean it’s the best choice?

The protein source is Truly Grass Fed Provon395, a high-quality whey isolate sourced from Ireland. However, it’s only 90% Truly Grass Fed, meaning 10% of the whey isn’t grass-fed—something other top-tier isolates don’t do. At $68 per tub, that’s a premium price for a blended product.

Nutrabio uses a mix of monk fruit and stevia as sweeteners. If you’re sensitive to stevia, you’ll notice it. The monk fruit helps tone it down but still leans on the sweeter side.

Nutrabio nails ingredient transparency, but that 90% grass-fed claim and the reliance on stevia keep it from being a perfect pick. At this price point, you can get a 100% Truly Grass Fed whey isolate with a higher leucine percentage—and without the stevia gamble.

📋 Nutrabio Grass Fed Whey Protein Isolate Ingredient List

Nutrabio Grass Fed Whey Protein Isolate is all about transparency. Unlike brands that hide behind “proprietary blends,” Nutrabio lists every ingredient and exact amount. But does that mean it’s the best option? Let’s break it down.

Nutrabio Grass Fed Whey Protein Isolate, Ice Cream Cookie Dream
Ingredient	Amount	Purpose
Grass Fed Whey Protein	29.07 g (delivering 25 g of complete protein)	Main protein source
Natural Flavor	1,085 mg	Taste and flavor profile
Natural Cocoa Powder	500 mg	Chocolate flavoring
Xanthan Gum	240 mg	Thickener and stabilizer
Monk Fruit Extract	170 mg	Natural zero-calorie sweetener
Steviol Glycosides (Stevia Leaf Extract)	125 mg	Natural zero-calorie sweetener

Examining the ingredient profile, Nutrabio Grass Fed Whey Protein Isolate sets the standard for what a premium-priced protein powder should offer—a minimal ingredient list, no artificial sweeteners, and fully disclosed amounts. Transparency is Nutrabio’s strong suit, but what would I change?

The “natural sweetener” label. While I appreciate that Nutrabio Grass Fed Whey Protein Isolate lists exact dosages, what’s being grouped under a vague label?

If you don’t like stevia, monk fruit, or both, you might want to think twice before committing. I found it bland but borderline too sweet—a strange balance. The monk fruit tempers the stevia a bit, keeping it mild, but it’s a unique take on sweetness.

Nutrabio Grass Fed Whey Protein Isolate delivers on ingredient transparency, but its sweetener profile won’t be for everyone.

🌍 What Does Nutrabio Get Their Grass Fed Whey?

🔑 Nutrabio Protein Grass Fed Supplement Facts; TLDR

Nutrabio Grass Fed Whey Isolate claims transparency but raises two major red flags:

1. The 90% Grass-Fed Problem – Nutrabio admits that 10% of its protein source is unaccounted for, unlike fully certified Truly Grass Fed brands. If you’re paying $68 per tub, you should get a 100% grass-fed whey isolate, not a blend.
2. The Supplement Facts Loophole: By using Supplement Facts instead of Nutrition Facts, Nutrabio avoids stricter FDA transparency requirements. Brands using this tactic—like Legion—often have sourcing concerns and lower-than-expected leucine content.

At $2.34 per serving, Nutrabio is a premium Truly Grass Fed whey isolate without full verification. If you’re looking for 100% Truly Grass Fed whey, better options exist with superior leucine content, transparency, and pricing.

🥗 Nutrabio Protein Grass Fed Supplement Facts

Let’s break down what Nutrabio Grass Fed Whey Isolate Protein Powder offers with its Supplement Facts panel—and, more importantly, why it matters.

Why Supplement Facts Instead of Nutrition Facts?

Protein powders are traditionally classified as food products, meaning they should be labeled with the Nutrition Facts information under FDA food labeling regulations (21 CFR 101.9).

“The Nutrition Facts panel must be used for all food products unless the product is classified as a dietary supplement.” – FDA 21 CFR 101.9

However, Nutrabio Grass Fed Whey Isolate Protein Powder is labeled under Supplement Facts, which falls under FDA’s dietary supplement regulations (21 CFR 101.36)

“A dietary supplement shall be labeled with a Supplement Facts panel if it is not represented for use as a conventional food and is intended to supplement the diet.” – FDA 21 CFR 101.36

Here’s the problem—protein powder is a food product. It provides macronutrients and calories and is consumed like any other dietary protein source. By classifying it under Supplement Facts, Nutrabio is avoiding the stricter transparency requirements of Nutrition Facts.

Breaking Down the Nutrition Data

Here’s what Nutrabio Grass Fed Whey Isolate Protein Powder, Ice Cream Cookie Dream looks like on paper:

Nutrabio Grass Fed Whey Protein Isolate, Ice Cream Cookie Dream
Nutrients	Amount per Serving
Serving Size (g)	31.17
Calories	110
Total Fat (g)	0
Sodium (mg)	120
Total Carbohydrates (g)	2
Dietary Fiber (g)	0
Total Sugars (g)	0
Protein (g)	25

What’s Missing or Worth Questioning?

Nutrabio Protein Grass Fed Supplement Facts Wrap-Up

Nutrabio Grass-Fed Whey Isolate Protein Powder is transparent in listing exact ingredient dosages and providing a full amino acid profile. Still, using Supplement Facts instead of Nutrition Facts raises some concerns.

If this were a fully Truly Grass Fed whey isolate, there would be no reason to classify it as a supplement instead of a food product. The 90% grass-fed claim and lower leucine content suggest this is a blended protein, not a 100% Truly Grass Fed whey isolate.

At $68 per tub, you’re paying a premium price for what appears to be a blended product. If you want 100% Truly Grass-Fed whey, there are better options at a lower cost, with full transparency and stronger amino acid profiles.

🍗 Protein Percentage per Serving in Nutrabio Grass Fed Whey Isolate Protein Powder

You expect consistent protein density across flavors when paying $68 for a tub of Nutrabio Grass Fed Whey Isolate Protein Powder. However, a noticeable range between flavors in the protein percentage per serving raises some questions.

The average protein percentage across all Nutrabio Grass Fed Whey Isolate Protein Powder flavors is 84.2%, but some flavors drop lower than expected.

Flavor	Protein per Serving (g)	Scoop Size (g)	Protein Percentage (%)
Vanilla	25	29.84	83.8
Chocolate Milk Shake	25	28.86	86.6
Matcha Latte	25	28.97	86.3
Ice Cream Cookie Dream	25	31.17	80.2
Average Protein Percent Across All Nutrabio Grass Fed Whey Flavors: 84.2%

Nutrition Facts: 7.5 out of 10.
Nutrabio Grass-Fed Whey Isolate Protein Powder is transparent in listing exact ingredient dosages and providing a full amino acid profile. Still, using Supplement Facts instead of Nutrition Facts raises some concerns.

If this were a fully Truly Grass Fed whey isolate, there would be no reason to classify it as a supplement instead of a food product. The 90% grass-fed claim and lower leucine content suggest this is a blended protein, not a 100% Truly Grass Fed whey isolate.

At $68 per tub, you’re paying a premium price for what appears to be a blended product. If you want 100% Truly Grass Fed whey, there are better options with full transparency and stronger amino acid profiles at a lower cost.

📋 Nutrabio Grass Fed FAQ

❓Is Nutrabio Grass Fed Isolate Lactose-Free?

When reviewing Nutrabio Grass Fed products, I had no GI issues. I may have had a mildly filled stomach. Be aware that Nutrabio Grass Fed Isolate is a 90% blend of Truly Grass Fed and 10% grass isolate from an unknown source. 

❓Is Nutrabio Grass Fed Isolate Gluten Free?

NutraBio does not claim that Grass Fed Isolate is certified gluten-free. While whey protein doesn’t contain gluten, cross-contamination is possible if processed in a facility that handles gluten-containing ingredients.

If you have severe gluten sensitivities or celiac disease, I’d recommend reaching out to NutraBio directly or choosing a protein that explicitly carries a certified gluten-free label.

❓Where is Nutrabio Grass Fed Whey Sourced From?

Nutrabio didn’t confirm its country of origin when asked. Although it claims to be Truly Grass Fed certified, only 90% of its whey meets that standard, and the source of the remaining 10% is unknown. AGN Roots and Earth Fed Muscle provide verified origin details if full sourcing transparency matters.

❓Is Nutrabio Grass Fed Whey USDA Organic?

No, Nutrabio isn’t USDA Organic certified. Truly Grass Fed certification is not the same as USDA Organic. If you’re looking for 100% organic and grass-fed, Raw Organic Whey or AGN Roots are better options.

❓Does Nutrabio Grass Fed Whey Contain Digestive Enzymes or Probiotics?

Nope. This formula does not contain digestive enzymes or probiotics.

❓Does Nutrabio provide a Certificate of Analysis (COA)?

No. When I asked, they escalated my request and closed it without follow-up. AGN Roots and Muscle Feast provide full lab reports if you want a COA upfront.

❓Is Nutrabio Grass Fed Whey Tested for Heavy Metals or Contaminants?

Nutrabio claims to test, but they didn’t confirm specifics when asked. They direct customers to CheckMySupps.com for batch testing, but that’s not the same as full transparency.

❓Are Nutrabio’s Facilities Third-Party Certified?

Yes, GMP-certified facilities follow industry standards. GMP certification doesn’t verify whey quality; it just checks manufacturing practices.

❓Is There A Risk of Allergen Cross-Contamination?

Nutrabio has not provided specifics. GMP standards help, but you’ll want to dig deeper if you have severe allergies.

❓Is Nutrabio Grass Fed Whey Cold-Processed?

Yes—90% of Nutrabio’s whey is Truly Grass Fed, which follows cold-processing standards to preserve protein integrity. However, the remaining 10% of whey is unaccounted for and does not necessarily adhere to the same processing or sourcing standards.

That means claims like non-GMO, hormone-free, and soy-free technically apply to only 90% of the formula. Without full transparency on the remaining 10%, verifying whether those claims apply to the entire product is impossible.

❓Is Nutrabio Grass Fed Whey Cruelty-Rree?

Partially. 90% of Nutrabio’s whey is Truly Grass Fed, which follows Animal Welfare Approved (AWA) standards. However, the remaining 10% is unaccounted for, so it doesn’t fully meet cruelty-free verification like AGN Roots or other 100% Truly Grass Fed options. Nutrabio’s 90% standard may be insufficient if animal welfare is prioritized.

❓Is Nutrabio A Good Brand?

Nutrabio is a solid brand, but that doesn’t mean it’s without flaws.

Nutrabio built its reputation on full-label transparency, third-party testing, and a commitment to clean formulations—things most brands don’t offer. They also provide detailed amino acid profiles for batch testing through CheckMySupps.com and avoid proprietary blends, a step above mainstream brands.

But when it comes to Nutrabio Grass Fed Whey, transparency falls short. The protein is only 90% Truly Grass-Fed, leaving 10% of its sourcing unknown. That’s not the full verification you’d expect for a $68 tub. When I asked for a Certificate of Analysis (COA) or sourcing details, my request was escalated and ignored.

So, is Nutrabio a good brand? For general supplements, yes. For grass-fed whey? That’s debatable. Suppose you want 100% Truly Grass Fed whey with full transparency. In that case, better options exist—AGN Roots and Earth Fed Muscle offer stronger certifications, better leucine content, and clearer sourcing at a lower price per serving.

🏁 Nutrabio Grass Fed Whey Isolate Review – Final Thoughts

Regarding Nutrabio Grass Fed Whey Isolate, transparency is its biggest asset and weakness. Here are three things you should know before buying:

1. 90% Grass-Fed, 10% Unaccounted For – Nutrabio uses Truly Grass Fed whey, but only 90% of its protein source meets this standard. The remaining 10% is from an unknown origin, which isn’t the full verification you’d expect at this price point. If you’re paying a premium, you should get 100% Truly Grass Fed whey—not a blended product.
2. Leucine Content Raises Questions – At 10.4% leucine per serving, Nutrabio’s formula lands below fully Truly Grass Fed options like AGN Roots (11.73%) and Earth Fed Muscle (11.6%). For context, this is the same leucine percentage as Optimum Nutrition Gold Standard Whey—a mainstream blend, not a premium grass-fed isolate. This isn’t it if you’re expecting a top-tier amino acid profile.
3. Premium Price Without Full Certification – At $2.34 per serving, Nutrabio Grass Fed Whey is one of the most expensive Truly Grass Fed options. Yet, it lacks third-party testing beyond CheckMySupps.com, does not provide a Certificate of Analysis (COA) on request, and uses Supplement Facts instead of Nutrition Facts, giving it more transparency concerns. For the price, competitors offer more verification for less.

If ingredient transparency is your priority, Nutrabio is better than most brands. But in Truly Grass Fed whey isolates, better options exist at a lower cost.

So, is Nutrabio a good brand overall? Let’s break that down next. 

✅ Is Nutrabio Good?

Nutrabio Grass Fed Whey Isolate’s strongest selling point is transparency. It provides full-label disclosure, exact ingredient dosages, and third-party batch testing through CheckMySupps.com. This product fits the bill if you want a clean-label protein powder with no proprietary blends.

But does that make it the best Truly Grass Fed whey isolate? Not exactly.

Compared to fully verified, 100% Truly Grass Fed brands like AGN Roots and Earth Fed Muscle, Nutrabio falls short. The 90% grass-fed claim leaves 10% of its whey sourcing unaccounted for—a red flag at this price point. Plus, only 10.4% leucine matches Optimum Nutrition Gold Standard Whey, a mainstream blend that costs far less.

So, is Nutrabio Grass Fed a solid buy? Objectively, yes. It’s transparent, third-party tested, and free of artificial fillers. However, when comparing quality, leucine content, and price-to-value ratio, it ranks last among the Truly Grass Fed proteins I’ve reviewed. At $2.34 per serving, better options exist with full grass-fed verification, higher leucine content, and stronger third-party testing.

Final Score: 78% – Good Buy
For some, it’s worth the purchase. Personally? I took advantage of Nutrabio’s 90-day Forever & A Day Guarantee.

Are you looking for more protein reviews? Here are all of JKremmer Fitness unbiased protein powder reviews. Are you looking for a protein review that I haven’t done yet? Email me at my ‘Contact Me’ page, and I’ll do my best to get an unbiased review out in 4 weeks. 

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🧐 Nutrabio Grass Fed Whey Isolate Review Round-Up

Category	Score
Value	4 out of 10
Amino Spiking	10 out of 10
Mixability	8.5 out of 10
Ingredient List	9 out of 10
Nutrition Facts	7.5 out of 10
Overall Score	39/50, 78%, Solid Buy

📑 Nutrabio Grass Fed Whey Isolate Review Sources

Carrier, T. (2024, September 6). Certified Animal Welfare Approved by AGW farm animal welfare standards. A Greener World. https://agreenerworld.org/certifications/animal-welfare-approved/standards/

CFR – Code of Federal Regulations Title 21. (n.d.). https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/cfrsearch.cfm?fr=101.9#:~:text=Sec.,at%20the%20point%20of%20purchase.

Glanbia Ireland, Bord Bia, Teagasc, A Greener World, & Non GMO Project. (2018). WWW.TRULYGRASSFED.COM. In WWW.TRULYGRASSFED.COM. https://www.trulyfamilyfarms.com/wp-content/uploads/2019/06/TGF-Standard-Document-Final-Approved-Dec-2018.pdf

NutraBio Brands. (n.d.). Shipping & Returns Policy. https://nutrabio.com/pages/shipping-returns

Stark, M., Lukaszuk, J., Prawitz, A., & Salacinski, A. (2012). Protein timing and its effects on muscular hypertrophy and strength in individuals engaged in weight-training. Journal of the International Society of Sports Nutrition, 9(1). https://doi.org/10.1186/1550-2783-9-54
USDA National Nutrient Database for Standard Reference Legacy. (2018). Nutrient content in household measure. https://www.nal.usda.gov/sites/default/files/page-files/leucine.pdf