Unbiased BSN Syntha 6 Isolate Review

This BSN Syntha-6 Isolate Review is a special request from one of my YouTube subscribers. If you’d rather watch than read, I’m gradually transforming my protein powder reviews into video format. I’m always open to special requests and looking for more followers to join the journey!

If you’re looking for more BSN Protein reviews, I’ve nearly got all of the important ones done: BSN SYntha 6 Review and BSN Synhta 6 Edge Review.

🌟 As a certified strength and conditioning expert (NSCA) and nutrition specialist (CISSN), I’m here to give you straightforward, no-nonsense reviews. Everything I share is based on my hands-on experience with the product.

👥 I review products based on your requests and my personal interests—no sponsorships, no brand influence. My reviews are rooted in product quality alone, and I’m not afraid to call out proteins that fall short.

💼 Transparency is a priority. While I may include affiliate links, my opinions are never for sale.

🔍 My goal is to keep things simple, clear, and direct so you can feel confident and fully informed with every review you read.

📖 BSN Syntha 6 Isolate Review Details

What can you expect from this BSN Syntha 6 Isolate Review?

 This review takes a deep dive into everything you need to know before deciding if this protein powder deserves a spot in your routine. I’ll cover key details like ingredient transparency, taste, mixability, and performance, along with its pros and cons as both a post-workout shake and a meal replacement option. This review leaves no stone unturned, from pricing breakdowns to comparisons with industry favorites like Optimum Nutrition Gold Standard Whey and Dymatize ISO 100.

If you’ve wondered whether Syntha 6 Isolate lives up to the hype or is just another over-marketed blend hiding behind proprietary terms like “Protein Matrix,” you’re in the right place. By the end, you’ll have all the facts, plus a few alternative recommendations if BSN doesn’t check all the boxes. Keep reading for a balanced, honest look at what BSN Syntha 6 Isolate offers.

🍶 What Is BSN Protein?

BSN offers three types of protein powders:

• BSN Syntha-6
• Syntha-6 Isolate
• Syntha-6 Edge

Two protein powders—Syntha-6 and Syntha-6 Edge—feature a six-source protein blend. The exception is Syntha-6 Isolate, which relies on BSN’s proprietary isolate blend, ISOLAST. According to the ingredient label, ISOLAST contains:

• Fast- and slow-release proteins
• Whey protein isolate
• Milk protein isolate, 80% casein and 20% whey, provides a lower lactose content.

What’s the difference between these three BSN protein powders, and when should you use them? Keep reading to find out. 

📊 What’s The Difference Between BSN Protein Powders 

As shared, BSN Syntha-6 protein powders typically blend six different protein sources. However, the specific ingredients and fiber content vary between each BSN product. To help you decide which BSN protein powder aligns with your goals, here’s a quick comparison:

BSN Protein Powder	Calories	Fat per Serving	Protein per Serving	How many protein sources?	Fiber per Serving	What is the best time to use protein powder?
BSN Syntha 6 Protein Matrix	140	2 grams	25 grams	Six	6 grams	Before bed, meal replacement, or any time protein
BSN Syntha 6 Isolate	140	1.5 grams	25 grams	Two, isolates	2 grams	Pre, post, or anytime
BSN Syntha 6 Edge	160	4.5 grams	24 grams	Six	0 grams	Pre- or post-workout

If you’re trying to determine which BSN protein powder fits your goals, keep reading to learn more.

🏋️‍♂️ How to Use BSN Protein Powder for Weight Loss

I’m a big believer in using BSN Protein Powder to help you achieve your weight loss goals. Here’s why some of BSN’s protein powders stand out when it comes to providing appetite satiety:

• Low calories per serving
• High fiber content per serving
• Just the right amount of sweetness to curb sugar cravings

If you’re considering using Syntha-6 as a meal replacement, you have two solid options: BSN Syntha-6 Protein Matrix or BSN Syntha-6 Isolate. You can check out my in-depth review of Syntha-6 (my full thoughts here). If you’re looking for a way to completely commit to a weight loss program with BSN Syntha-6, I recommend reading about my Modified Velocity Diet 2.0 for a structured approach with BSN Proteins.

BSN Protein Powder is the best option I’ve reviewed regarding budget-friendly meal replacement shakes. Many alternatives, like MRE Lite, fail to deliver true muscle-building protein. My MRE Lite review highlighted that collagen is its primary protein source. While collagen is rich in glycine, it falls short in leucine, the amino acid crucial for stimulating muscle growth.

If your goal is weight loss and diet adherence, BSN Syntha-6 Protein Matrix is the shake to keep you on track. If you want to build muscle while staying on your diet, BSN Syntha-6 Isolate could be the better choice.

Which brings us to the next question: How many scoops of BSN Isolate do you need to stimulate muscle growth?

💪 Is Syntha-6 Good for Muscle Gain? Syntha 6 Post Workout

Research consistently shows that you need 25 grams of protein and up to 3 grams of leucine post-workout to stimulate muscle growth effectively. BSN Syntha-6 Isolate, however, complicates things with its proprietary protein blend, combining fast- and slow-digesting proteins. So, how many scoops should you really use?

Let’s break it down. Syntha-6 Isolate provides 25 grams of protein per scoop, but BSN doesn’t disclose how much leucine is included in each serving. Additionally, Syntha-6 Isolate uses a blend of whey protein isolate and milk protein isolate. Based on the proprietary nature of BSN’s ISOLAST blend, I’m assuming there’s a likelihood of amino spiking, which raises further concerns about transparency.

The research suggests that for slow-digesting proteins like milk protein isolate, you should aim for 30–40 grams of protein post-workout.

Recommendations for Syntha-6 Post-Workout

• If using water: Go with two scoops to ensure you hit the target protein range.
• If using high-protein skim milk: Opt for 1.5 scoops. According to USDA data, high-protein skim milk provides 13 grams of protein and 1.3 grams of leucine per cup, which helps bridge the leucine gap when paired with Syntha-6.

🔬 Is Syntha-6 Good for Muscle Gain?

Syntha-6 is a decent option for muscle gain, but there are a few important things to consider. While the label advertises 25 grams of protein per serving, including a proprietary protein blend raises questions about transparency. BSN doesn’t disclose the leucine content or provide an amino acid profile, which makes it hard to know how much of the protein is high-quality versus potentially amino spiked.

Here’s the takeaway: Syntha-6 Isolate is a “tweener”—good at several things but not great at any one. It works well as a general protein supplement and has enough fiber to double as a low-calorie meal replacement. However, if muscle growth and recovery are your main goals, you’re better off with a protein powder that offers transparent sourcing, no proprietary blends, and a verified leucine profile. Syntha-6’s lack of transparency makes it tough to recommend as a top choice for serious muscle gain.

If you’re set on using Syntha-6 Isolate as a post-workout shake, here’s what I’d suggest:

• Two scoops with water
• 1.5 scoops with high-protein skim milk

If you want a milk protein isolate post-workout powder, check out my HitPoint Ultra Protein Review. This great-tasting protein is limited to only two flavors. But if you love the creaminess and thickness of a milk protein isolate, you’ll love PR Breaker’s Protein Powder. 

🛒 Best Place to Buy Syntha 6 Isolate? Amazon

There are plenty of places to buy Syntha-6 Isolate, but Amazon offers the best deal. Full disclosure: I purchased both of my Syntha-6 Isolate containers from Amazon. Here’s why Amazon is a great option:

• Free two-day shipping for Prime members
• Subscribe and Save deals for extra savings
• Full selection of all Syntha-6 Isolate flavors
• Potential for Lightning Deals and unexpected discounts

How much will Syntha-6 Isolate cost you on Amazon?
Here’s the current pricing for the Syntha-6 Isolate Strawberry Milkshake:

• $42.99 for 24 servings ($1.79 per serving, or $1.70 per serving with Subscribe and Save)
• $57.59 for 48 servings ($1.20 per serving, or $1.14 per serving with Subscribe and Save)

Next, let’s examine whether BSN Sports offers a money-back program.

💸 Does BSN Sports Have A Money Back Guarantee?

BSN Sports offers a money-back guarantee, but there are a few stipulations. Here’s what they state on their Terms page:

“We guarantee 100% satisfaction with your purchase! Products may be returned for a refund within 30 days of receipt, when returned in accordance with our Return Policy set forth below.”

If you don’t want to dive into the full Return Policy, here’s a quick summary:

• Purchases must be made from approved BSN sellers.
• Return authorization must be approved by BSN Sports.
• To initiate a return, contact BSN Sports at 1-800-856-3488.

Value: 5 out of 10.
Five!? I never give out fives. Let me explain. BSN protein powders aren’t made for experienced gym-goers scrutinizing protein quality and amino acid profiles. Instead, they’re geared toward casual gym-goers looking to improve their lifestyle, commit to exercise, and start their weight-loss journey.

That said, I stand by this: BSN protein powders are the best-tasting protein powders on the market. They’re perfect for anyone who wants a shake that tastes amazing and feels like a treat rather than a diet. I firmly believe that BSN Isolate is an excellent “lite” meal replacement and can offer some value as a post-workout shake for casual gym-goers.

Yes, BSN Isolate has serious issues with protein quality and transparency. But here’s the flip side: it tastes fantastic, provides a decent feeling of fullness with an okay amount of fiber, and is a great option for people starting their journey toward becoming the healthiest version of themselves.

⚛️ Is BSN Syntha 6 Isolate Amino Spiked?

Suppose you’re a regular reader of my protein reviews. You know my process: find the amino acid profile, request the profile if unavailable, evaluate leucine content per serving, and analyze the ingredient list. I did all those steps; however, with Syntha 6 Isolate by BSN, the answer is hidden in plain sight. 

BSN powders routinely use “Protein Matrix” to describe their protein blend. This term indicates a blend of different protein sources, which can benefit a more balanced amino acid profile. However, in my professional opinion, BSN may use this term to hide a low-quality or incomplete protein product blended with amino acids. But don’t just take my word for it—ask yourself these critical questions. 

1. How many reputable protein companies rely on terms like “Protein Matrix,” “Amino Peptides,” or “Full Spectrum Peptides” to describe their blends? (Hint: I’ve only reviewed two—Designer Wellness Whey and BSN Syntha 6.)
2. Why would BSN refuse to share an amino acid profile if there’s nothing to hide?
3. Why does Glanbia Performance Nutrition, the parent company behind BSN, Optimum Nutrition, Isopure, and other leading brands, have inconsistent product transparency? If Optimum Nutrition can share amino acid profiles, why can’t Syntha 6 Isolate by BSN?

If you value transparency when purchasing protein, BSN Syntha 6 Isolate may leave you with more questions than answers. 

🧬 BSN Syntha 6 Amino Acid Profile

I firmly believe that Syntha 6 Isolate by BSN is amino spiked. How did I come to that conclusion? The term “Protein Matrix” is not commonly used in high-quality protein powders. Plus, you have to look at these other circumstances with Syntha 6 Isolate by BSN:

• No amino acid profile is shared on the container.
• The absence of this detailed profile on their website is a red flag for BSN Syntha 6 Isolate.
• Even the FAQ page offers limited information, directing you to email customer service for detailed queries bsnconsumeraffairs@bsnonline.net.

I did what any researcher would do: I followed up with questions and requests. BSN replied within 48 hours, and while they were transparent with many of my questions, the one we all care about—What is the amino acid profile of Syntha 6 Isolate by BSN?—went unanswered.

Here’s what their customer service team had to say:

“We don’t track the specifics of each amino acid as they are naturally occurring and not added. Rest assured, there is a full amino acid profile to make it a complete protein.”

Not reassuring.

The Bottom Line
If you’re a gym-goer seeking transparency about the protein you’re buying, BSN leaves many unanswered questions. Instead, consider alternatives: two protein powders that provide full amino acid profiles and two intra-brand comparisons within Glanbia Performance Nutrition’s umbrella brand. 

🆚 Comparing Protein Sources: Syntha 6 Isolate vs ON Gold Standard

In comparing protein sources, let’s start with two Glanbia Performance Nutrition products: Synta 6 Isolate vs ON Gold Standard. In my review of ON Gold Standard Whey, I crowned it the best budget protein on Amazon thanks to its solid taste, great mixability, and unmatched transparency.

But how does Whey Isolate Syntha 6 stack up? Honestly, there are glaring issues. First, no information about leucine content per serving. Leucine is the key muscle-stimulating amino acid, so why leave us guessing? Second, the price tag. Whey Isolate Syntha 6 costs more per serving than Gold Standard. But Whey Isolate Syntha 6 offers a better meal replacement shake than ON Gold Standard. 

Where does Whey Isolate Syntha 6 shine? Easy: flavor and fiber. It’s the best-tasting protein powder on the market, but its meager amount of fiber makes it a “lite” meal replacement option, not BSN’s best option.

The Bottom Line
ON Gold Standard Whey is better for those prioritizing value, transparency, and muscle-building efficiency. However, if flavor and satiety are your top priorities, Whey Isolate Syntha 6 Isolate earns its place as a meal replacement option with slightly more protein per serving. That said, the protein per serving should raise an eyebrow—the lack of transparency about its amino acid profile leaves too many unanswered questions.

Comparison Metrics	BSN Syntha 6 Isolate  Strawberry	ON Gold Standard Strawberries & Cream
Leucine	Proprietary	2.6 grams
Leucine Percent	Proprietary	10.83%
Total BCAAs	5.5 grams	5.5 grams
Protein per Serving	25 grams	24 grams
Carbs per Serving	6 grams	3 grams
Fiber per Serving	2 grams	0 gram
Total Sugars	2 grams	1 gram
Calories	140	120
Serving Size	38 grams	31 grams
Number of Servings	24 serving	29 servings
Amazon Price	$42.28	$39.04
Price per Serving	$1.76	$1.34

🆚 Comparing Protein Sources: BSN Syntha 6 vs Dymatize ISO 100

In my Dymatize ISO 100 review, I highlighted that despite offering only 20 servings per container, the hydrolyzed isolate and isolate blend is ideal as a post-workout shake. ISO 100 is a standout option for individuals with lactose sensitivity due to its ultra-fast digestion and low lactose content. It’s readily available on Amazon.

But how does BSN Syntha 6 Isolate compare? The two proteins couldn’t be more different. While Syntha Whey Isolate is also a blend of whey and milk protein isolate, its slower-digesting nature and higher fiber content make it more versatile. Syntha Whey Isolate can be used as a meal replacement, an anytime shake, or a post-workout shake, though it’s not perfectly optimized for post-workout recovery.

In contrast, ISO 100 is a one-trick pony. It’s built for one purpose: rapid absorption post-workout. If you’re looking for versatility, Syntha Whey Isolate outshines ISO 100.

The Bottom Line
Syntha Whey Isolate is the better choice. Here is what Syntha Whey Isolate offers: an okay post-workout shake, solid meal replacement, or a fantastic general protein supplement. Once again, a lack of transparency about its amino acid profile raises questions about your purchasing quality. Seeing “Protein Matrix” is not a ringing endorsement for quality. 

On the other hand, Dymatize ISO 100 is laser-focused on fast recovery, making it the go-to option for post-workout purposes, especially for those with lactose sensitivity. If transparency and fast digestion are your priorities, ISO 100 is the better choice. If you’re looking for flavor, Syntha Whey Isolate reigns supreme.

Comparison Metrics	BSN Syntha 6 Isolate  Strawberry	Dymatize ISO 100 Strawberry
Leucine	Proprietary	2.677 grams
Leucine Percent	Proprietary	10.83%
Total BCAAs	5.5 grams	5.5 grams
Protein per Serving	25 grams	25 grams
Carbs per Serving	6 grams	2 grams
Fiber per Serving	2 grams	0 gram
Total Sugars	2 grams	1 gram
Calories	140	110
Serving Size	38 grams	30 grams
Number of Servings	24 serving	20 servings
Amazon Price	$42.28	$23.24
Price per Serving	$1.76	$1.16

🆚 Comparing Protein Sources: BSN Syntha 6 Isolate vs Edge

This final intra-brand comparison pits BSN Syntha 6 Isolate against BSN Edge. While I haven’t yet written a full review of BSN Edge Protein, it’s next on my list. So, what sets these two apart? Here’s what a BSN representative shared with me:

• Best Use: BSN Edge is optimized as a post-workout shake, while Syntha Isolate Protein offers more versatility.
• Digestion Speed: BSN Edge is faster digesting since it contains no fiber, making it ideal for post-workout recovery. Syntha Isolate Protein is slower digesting due to 2 grams of fiber.
• Protein Sources: BSN Edge includes six protein sources (hence “Syntha 6”), while Syntha Isolate Protein relies on two (whey isolate and milk protein isolate).

When I write my full review of BSN Edge, I’ll link it here for a deeper dive. For now, I can say that BSN Edge shares the same transparency issues as Syntha Isolate Protein—no amino acid profile is provided, and a vague term, “Protein Matrix,” is recurring. Both BSN protein powders shine bright when it comes to flavor.

Do you want the best any-time protein by BSN? Edge is available on Amazon. Check out my BSN Edge Review here.

The Bottom Line
If you’re in the market for a fast-digesting post-workout shake, BSN Edge takes the lead with its lack of fiber and multi-source protein blend. However, both products suffer from the same critical flaw: a lack of transparency regarding their amino acid profiles. BSN Edge delivers if flavor is your priority and transparency isn’t a deal-breaker. For those seeking a more versatile option suitable as a meal replacement or anytime shake, Syntha Isolate Protein is the better choice.

Comparison Metrics	BSN Syntha 6 Isolate Chocolate Milkshake	BSN Syntha 6 Edge Chocolate Milkshake
Leucine	Proprietary	Proprietary
Leucine Percent	Proprietary	Proprietary
Total BCAAs	5.5 grams	Not Listed
Protein per Serving	25 grams	24 grams
Carbs per Serving	7 grams	1 gram
Fiber per Serving	2 grams	6 grams
Total Sugars	2 grams	2 gram
Calories	140	160
Serving Size	24 grams	29 grams
Number of Servings	24 servings	28 servings
Amazon Price	$42.28	$37.49
Price per Serving	$1.76	$1.87

📜 Is BSN Syntha Isolate 3rd Party Tested?

When examining a container of BSN Syntha Isolate, you’ll notice it’s manufactured according to cGMP (Good Manufacturing Practices). When I contacted BSN Customer Service, the rep assured me that BSN performs in-house testing and that their main distributor, Glanbia Performance Nutrition, adheres to strict raw ingredient procurement standards.

But what about true third-party testing? Are BSN Syntha Isolate’s ingredient list or protein claims independently verified?

The BSN representative shared that BSN Syntha Isolate is certified by Informed Choice. However, after examining the list, BSN Syntha Isolate needed to be verified when this review was released, meaning the representative needs up-to-date information about it. The only verified Informed Choice supplement offered by BSN is Endorush. 

Amino Spiking: 1 out of 10.
BSN Syntha Isolate earns a low score for transparency, making it a likely amino-spiked protein. Why? No amino acid profile is provided, and BSN uses consistent labeling across all their products with vague terms like “Protein Matrix.”

When examining the small print, BSN highlights its proprietary blend, ISOLAST. But what is ISOLAST? It’s simply a two-protein blend of whey protein isolate and milk protein isolate. So why the secrecy? Many other protein powders use this same combination without hiding behind proprietary labels.

If you’re looking for a protein powder that offers greater transparency and a similar taste, check out my PR Breaker Protein Powder Review.

🥤 What’s The Best Way To Mix Whey Protein Syntha 6 Isolate?

After reading the Whey Protein Syntha 6 Isolate instructions, you might wonder if this protein clumps during mixing. Let’s break down the instructions:

• Mix 38g (about one scoop)
• Into 4-5 fl oz of cold water (or any beverage of your choice)
• Shake

For an even better experience, BSN recommends using non-fat or low-fat milk to achieve a rich milkshake-like taste. I’ve tried both, and let me tell you—using milk is a game-changer. If you struggle with weight loss due to sugar cravings or poor dietary choices, you’ll love the sweetness and thickness Whey Protein Syntha 6 Isolate provides.

So, how does Whey Protein Syntha 6 Isolate mix? Flawlessly. I typically use two scoops with fluid ounces of water and never encounter clumps. Whether you’re rushing out of the gym or need a fast breakfast shake, it’s easy, convenient, and hassle-free.

⚖️ Does Whey Protein Syntha 6 Isolate Come With a Scoop?

Yes, Whey Protein Syntha 6 Isolate comes with a scoop, and one scoop is about one serving.

Mixability: 10 out of 10.
Whey Protein Syntha 6 Isolate mixes easily and is super convenient. Whether you use milk or cold water, it mixes flawlessly. 

📋 BSN Syntha 6 Isolate Ingredients

Undoubtedly, BSN Isolate Syntha 6’s ingredient list is rather extensive. Additionally, BSN Isolate Syntha 6 contains GMO and artificial ingredients. However, for those with dietary restrictions, it’s noteworthy that BSN Isolate Syntha 6 is suitable for Lacto-ovo-vegetarians. This is made possible by how BSN derives its rennet source: synthetically and fugally.

The name speaks for itself if you examine the acronym BSN: Bio-engineered Supplements & Nutrition. The protein source is synthetically derived, reflecting their approach to manufacturing.

Let’s examine the ingredient list for BSN Isolate Syntha 6 Strawberry Milkshake to see what’s in it.

BSN Syntha 6 Isolate Strawberry
BSN Isolate Whey Ingredients	Purpose
Protein Matrix (Whey Protein Isolate and Milk Protein Isolate)	A blend of fast protein and slow protein digestion
Sunflower Creamer (Sunflower Oil, Corn Syrup Solids, Sodium Caseinate, Mono- and Diglycerides, Dipotassium Phosphate, Tricalcium Phosphate, Soy Lecithin, Tocopherols)	Provides creaminess, emulsifies ingredients, and stabilizes the mix.
Inulin	Dietary fiber
Polydextrose	Low-calorie sweetener
Natural and Artificial Flavors	Flavoring
Lecithin	Improves mixability
Cellulose Gum	Stabilizer
Citric Acid	Preservative and flavor balancing
Salt	Flavor enhancer
Beet Juice Powder	Coloring
Tartaric Acid	Provide overall flavor balancing for tartness
Sucralose	Zero-calorie artificial sweetener
Acesulfame Potassium	Zero-calorie artificial sweetener

Let’s now examine the ingredient list for BSN Isolate Syntha 6 Chocolate Milkshake. The only real difference between flavors is flavoring ingredients and coloring. 

BSN Syntha 6 Chocolate Milkshake
BSN Isolate Whey Ingredients	Purpose
Protein Matrix (Whey Protein Isolate and Milk Protein Isolate)	A blend of fast protein and slow protein digestion
Natural and Artificial Flavors	Flavoring
Coca Powder	Chocolate flavor enhancement
Sunflower Creamer (Sunflower Oil, Corn Syrup Solids, Sodium Caseinate, Mono- and Diglycerides, Dipotassium Phosphate, Tricalcium Phosphate, Soy Lecithin, Tocopherols)	Provides creaminess, emulsifies ingredients, and stabilizes the mix.
Inulin	Dietary fiber
Polydextrose	Low-calorie sweetener
Lecithin	Improves mixability
Cellulose Gum	Stabilizer
Salt	Flavor enhancer
Sucralose	Zero-calorie artificial sweetener
Acesulfame Potassium	Zero-calorie artificial sweetener

🌍 Does BSN Isolate Whey Import Their Protein Powder?

When I contacted BSN directly about their whey sourcing, a representative shared:

“The main source of our whey protein raw materials is our mother company, Glanbia Performance Nutrition. They are a cheese manufacturing plant based in Ireland.”

This seems straightforward, but let’s compare it to what I found during my reviews of ON Gold Standard Whey and ON Gold Standard Isolate. An Optimum Nutrition representative disclosed that their whey is sourced from Europe or India.

Since both BSN and Optimum Nutrition fall under the Glanbia Performance Nutrition umbrella, you might assume they share the same whey distribution system. Here’s my issue: BSN lacks detail and clarity. Compared to Optimum Nutrition, why not offer that same level of transparency if both are under the same umbrella brand?

Without additional clarification, we’re left guessing. While BSN provided a general answer, they didn’t offer the specifics you’d expect when comparing their transparency to Optimum Nutrition’s. If Glanbia can disclose detailed sourcing information for Optimum Nutrition, why not for BSN?

Ingredients List: 6.5 out of 10.
The BSN Isolate Whey ingredient list is extensive, and it’s no secret that it includes artificial and GMO ingredients. While this might not be a dealbreaker for everyone, it’s worth noting that BSN offers more transparency than other nationally recognized brands.

That said, if clean ingredients are a priority for you, BSN Isolate Whey likely won’t make it onto your protein wish list.

🥗 BSN Syntha 6 Isolate Nutrition Facts

Here are the nutrition facts for BSN Isolate Proteins. First up, Strawberry Milkshake. 

BSN Syntha 6 Isolate Strawberry
Nutrients	Amount per Serving
Serving Size	38 grams
Calories	140
Total Fat	2 grams
Sodium	150 milligrams
Total Carbohydrates	6 grams
Dietary Fiber	2 grams
Total Sugars	1 gram
Protein	25 grams

Here are the Nutrition Facts for BSN Isolate Protein Chocolate Milkshake. 

BSN Syntha 6 Chocolate Milkshake
Nutrients	Amount per Serving
Serving Size	38 grams
Calories	140
Total Fat	1.5 grams
Sodium	160 milligrams
Total Carbohydrates	7 grams
Dietary Fiber	2 grams
Total Sugars	2 grams
Protein	25 grams

Even though these are the Nutrition Facts for a small slice of BSN Isolate Proteins, there is little to no difference across flavor profiles. If you’re looking for a low-sugar protein powder with a small amount of fiber, BSN Isolate Protein is a solid choice for a meal-lite meal replacement.

🍗 Protein Percentage per Serving in BSN Isolate Syntha 6

Here are the protein percentages per serving for all BSN Isolate Protein flavors:

• Strawberry: 25g protein / 38g serving = 66% Protein per Serving
• Chocolate Milkshake: 25g protein / 38g serving = 66% Protein per Serving
• Vanilla Ice Cream: 25g protein / 38g serving = 66% Protein per Serving
• Chocolate Peanut Butter: 25g protein / 38g serving = 66% Protein per Serving
• Peanut Butter: 25g protein / 38g serving = 66% Protein per Serving

Average Protein Percentage for all BSN Isolate Flavors: 66%

What’s Great: Each flavor consistently offers 66% protein per serving.
What’s Not: If you want to avoid added fillers and artificial ingredients, BSN Isolate Protein likely won’t make your list. 

🍨 Is Syntha 6 Lactose Free?

The label on BSN Isolate Protein clearly states it contains milk and soy as ingredients. Combined with GMO ingredients, you might experience GI issues when drinking this protein.

While drinking BSN Isolate Protein for this review, I had a full stomach and mild bloating. The full feeling is likely due to the Milk Protein Isolate, a lower-lactose form of caseinate protein. If you have a strong stomach and are lactose sensitive, BSN Isolate Protein gets a thumbs-up for digestibility.

Nutrition Facts: 5.5 out of 10. 
BSN Isolate Protein offers 66% protein per serving but loses points for amino spiking, including fillers, artificial ingredients, and the lack of full disclosure on the ingredient list. 

👌 Whey Protein BSN Syntha 6 Best Flavor

BSN Syntha 6 Whey Protein Isolate comes in five core flavors. The flavor options feel endless When you add the base BSN Protein flavors and the Cold Stone Creamery line. For this flavor review, I tried two classics: Strawberry Milkshake and Chocolate Milkshake. Here are my thoughts:

BSN Syntha 6 Whey Protein Isolate Strawberry Milkshake
When you see the word “milkshake” and a picture of strawberries dunked in creamy milk, you expect a taste that matches the image. BSN Syntha 6 Whey Protein Isolate Strawberry Milkshake delivers.

It’s like the diet version of a Golden Arches strawberry milkshake—thick and gooey but without the excessive sugar. The sweetness hits just right, making it a fantastic choice for anyone with a fruity sweet tooth. If you’re craving a thick, indulgent shake with strawberry vibes, this flavor knocks it out of the park.

BSN Syntha 6 Whey Protein Isolate Chocolate Milkshake
Here’s why I adjusted my flavor scoring: taste is subjective. What I love, you might not. But with BSN Syntha 6 Whey Protein Isolate Chocolate Milkshake, the name says it all—you get exactly what’s promised.

If I had to compare it to something, I’d go with Fairlife Chocolate Milk. The key difference? With BSN Syntha 6, you’re skipping the 12 grams of sugar and the true milkshake consistency. While I’m not usually a fan of chocolate flavors, the BSN Syntha 6 Whey Protein Isolate Chocolate Milkshake is serviceable.

This is why I dropped my scoring metrics during my flavor review: my taste pallet differs from yours. However, the BSN Syntha 6 Whey Protein Isolate Chocolate Milkshake is exactly what you’re getting. 

Bottomline: Does Syntha 6 Taste Good?
Yes, it absolutely does! No matter which BSN Syntha 6 Whey Protein Isolate flavor, you’re in for a treat!

Now, let’s look at the court of public opinion with Amazon Syntha 6 Isolate Reviews.

⭐️ Amazon Whey Protein Review: Syntha 6 Isolate Review

As of the release of this BSN Syntha 6 Isolate review, the product holds a very positive 4.5 out of 5-star rating from over 3,600 verified buyers. Here’s a breakdown of the feedback:

Positives for BSN Syntha 6 Isolate Protein

• Great mixability and flavor
• Enjoyable milkshake taste
• The majority of users reported minimal stomach discomfort

Negatives for BSN Syntha 6 Isolate Protein

• Some users felt the thickness was too similar to that of a casein protein.
• Complaints about flavor profile changes due to a formula update, especially with Chocolate Peanut Butter.
• Reports of digestive issues, though not widespread.

If you’re deciding on a flavor, Amazon’s two most criticized options were BSN Syntha 6 Isolate Protein Chocolate Peanut Butter and Chocolate. Personally, I was indifferent toward chocolate, but it didn’t wow me.

Bottom Line
The negative reviews on Amazon didn’t raise concerns about the quality of BSN products. Users consistently praised the flavor, mixability, and overall experience.

Where do I stand? I firmly believe BSN Syntha 6 Isolate Protein is an amino-spiked protein powder. While I didn’t love the chocolate flavor, I agree with the positive reviews about its mixability and flavor overall. The only GI discomfort I experienced was mild bloating from feeling full, likely due to the Milk Protein Isolate.

Now, let’s get into my thoughts on BSN Syntha 6 Isolate Protein in more detail.

🏁 BSN Syntha 6 Isolate Review – Final Thoughts

Here’s the deal: BSN Syntha 6 Isolate Protein Powder is like that friend who’s amazing at cooking (flavor) but refuses to share the recipe (transparency). Let’s recap what you need to know before adding it to your protein lineup:

1. Taste Buds Approved
Flavor is where BSN Syntha-6 Isolate makes its mark—most of the time. Strawberry Milkshake delivers creamy, indulgent milkshake vibes without the sugar overload and stands out as a top choice. However, Chocolate Peanut Butter and Chocolate have drawn consistent criticism. Many users found these flavors underwhelming, and I wasn’t wowed by the Chocolate flavor either. Taste is subjective, but it’s worth noting if you’re particular about flavor options.

Mixability, on the other hand, is a clear win, earning a 10/10. Whether using water, milk, or non-dairy alternatives, it blends flawlessly every time—no clumps, no hassle.

2. Transparency? Not So Much
Here’s where things get murky. Terms like “Protein Matrix” and “ISOLAST” sound fancy, but they’re essentially marketing fluff. No amino acid profile, no clarity about the protein sources, and a likely case of amino spiking. If transparency and clean labels are your jam, BSN Syntha 6 Isolate Protein Powder might leave you with more questions than gains.

3. Versatility: Meal Replacement Potential, but Not Perfect
One thing you should know about BSN Syntha 6 Isolate Protein Powder: it’s in this weird in-between zone. It’s not quite good enough to be a dedicated post-workout shake, but it has potential as a meal replacement shake. That said, it’s not 100% a meal replacement, either.

Its thickness and slight fiber content (2 grams) make it serviceable as a light meal replacement, but it doesn’t pack enough calories or nutrients to satisfy truly. As a post-workout shake, its slower-digesting nature and lack of leucine transparency leave it lacking. Think of BSN Syntha 6 Isolate Protein Powder as a versatile, middle-of-the-road option that works decently in multiple scenarios but doesn’t excel at any single one.

Bottom Line
Here’s the thing: BSN Syntha 6 Isolate Protein Powder sits awkwardly between a post-workout shake and a meal replacement shake. It’s not optimized for post-workout recovery due to its lack of focus on fast-digesting protein and questionable transparency about leucine content.

BSN Syntha 6 Isolate Protein Powder is better as a meal replacement, thanks to its thickness and slight fiber content. However, it’s still not ideal—2 grams of fiber and a relatively low-calorie count don’t quite cut it for a fully satisfying meal replacement. Think of BSN Syntha 6 Isolate Protein Powder as a versatile, middle-of-the-road option that works decently in multiple scenarios but doesn’t excel at any single one. 

🤔 Is BSN Good Protein?

BSN Syntha-6 Isolate positions itself as a “tweener” protein powder. It falls short as a great post-workout option due to its slight fiber content, which slows digestion. As a meal replacement, it’s underwhelming due to its low fiber and overall lightness.

The red flags are impossible to ignore for those considering BSN Isolate as a post-workout shake. The label prominently features terms like “Protein Matrix” and “ISOLAST” (a proprietary blend of whey protein isolate and milk protein isolate), which immediately raise concerns about transparency. Adding to the skepticism is the absence of an amino acid profile—a typical hallmark of proprietary blends that hide the full picture of ingredient quality.

Is Syntha-6 Good for Muscle Gain?
Suppose BSN Syntha-6 Isolate isn’t amino spiked (a claim we can’t verify due to lack of transparency). In that case, research suggests you’d need at least 30 grams of protein post-workout for milk protein isolates to support muscle recovery effectively. With BSN Isolate, this means doubling up on servings—two scoops minimum—to meet this threshold, which adds cost and makes it less competitive.

Final Thoughts on BSN Syntha-6 Isolate
BSN Syntha-6 Isolate is for those prioritizing taste over function. Its milkshake-like flavor profile is undeniably appealing, making it a good fit for people starting a fitness or weight-loss journey who need something palatable to stay consistent. As a “lite” meal replacement, it offers trace amounts of fiber and a heavy dose of sweetness, which may help keep your dietary choices on rails. I firmly believe BSN Syntha 6 Isolate is a great “lite” meal replacement. 

However, if protein quality transparency are your main concern, BSN Isolate falls flat. Between the proprietary protein blend and lack of amino acid disclosure, BSN Isolate leaves too many unanswered questions. For those serious about optimizing post-workout recovery, you’ll likely end up back on Google searching for “best post-workout protein powders.”

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. 

🧐 BSN Syntha 6 Isolate Review Round-Up

Category	Score
Value	5 out of 10
Amino Spiking	1 out of 10
Shakeability Test	10 out of 10
Ingredient List	6.5 out of 10
Nutrition Facts	5.5 out of 10
Overall Score	28.5/50, 56%, Serviceable

📑 Sources

Glanbia Performance Nutrition. (n.d.). Glanbia. https://www.glanbia.com/about/our-business/glanbia-performance-nutrition

Mero, A. (1999). Leucine supplementation and intensive training. Sports Medicine, 27(6), 347–358. https://doi.org/10.2165/00007256-199927060-00001

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

Burd NA, Yang Y, Moore DR, Tang JE, Tarnopolsky MA, Phillips SM. Greater stimulation of myofibrillar protein synthesis with ingestion of whey protein isolate v. micellar casein at rest and after resistance exercise in elderly men. British Journal of Nutrition. 2012;108(6):958-962. doi:10.1017/S0007114511006271

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