Is Transparent Labs Protein Good? 2026 Review, Pros, Cons & Lab-Tested Quality

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Transparent Labs has been a staple recommendation of mine for years, and as we move into 2026, they continue to set the industry standard for what a “clean” supplement should look like. While most brands are busy hiding behind proprietary blends or flashy marketing, Transparent Labs has doubled down on their commitment to 100% formula disclosure and third-party testing.

After personally testing over 50 whey proteins throughout my career as a supplement store manager and nutrition coach, here is how the Transparent Labs Grass-Fed Whey Isolate holds up today.

Key Takeaways

Honest Review Guarantee from FeastGood: Our testing team purchases each product 100% independently and uses the product for several weeks up to several months before writing a review. Learn more about our review process here.

• While it comes with a premium price tag ($2 per serving vs the average of $1.34), it contains 93% protein, higher than any other protein we’ve tested at FeastGood.com.  

• It has completely transparent labels, so you know the exact amount of each ingredient in the product. It even comes with a certified lab certificate for your exact bottle and batch (most supplement companies don’t do this).

• The taste, texture, and mixability ranked the highest among everyone on the team who tried it compared with other protein powders.

What Is Transparent Labs? 

Transparent Labs prides itself on being a completely transparent company, as the name would suggest. This means that they disclose the testing results from every single batch of product they produce, allowing you to verify the quality and purity of your product. 

They also disclose the exact ingredients on their ingredient labels, down to the mg dose in many instances, helping you make an informed decision about the products you are taking. 

For example, here’s something that no other supplement company allows you to do:

On their website, you can find the Certificate of Analysis page for your product, which shows the percentage breakdown for ingredients contained in the product) and the results of testing for impurities.

For my protein tub specifically:

• The Certificate of Composition indicated that the product was 94.3% protein and 5.7% flavor

• My specific lot number was 22081067, which I initially couldn’t find listed on the website. So, I emailed Transparent Labs and quickly heard back from them (2 days later) with a link to a certificate of analysis for the chocolate whey protein. 

(If you’re interested, here were the exact testing results)

In recent years, Transparent Labs has upped their third party testing certification and they are now both Informed Choice and Informed Protein Certified. 

The latter of these certifications goes a step beyond testing for contaminants and verifies the total protein content of the powder to make sure there is no amino acid spiking. In other words, this certification tests the protein to make sure that if it says it contains 28g of protein per scoop, it actually does. 

Overview of Transparent Labs Grass-Fed Whey Protein Protein

The macronutrient breakdown of the Transparent Labs Grass-Fed Whey

• Protein: 28g
• Carbohydrates: 1g
• Fat: 0.5-1g
• Sugar: 0-1g (depending on the flavor)

At 130-140 calories per serving (depending on the flavour), protein accounts for approximately 86% of the calories in this product. This puts the Transparent Labs Grass-Fed Whey Protein on the highest end of the spectrum for protein content. 

Our general guideline is that a reasonable protein powder offers 65-75% protein per scoop, a good product has 75-85% protein per scoop, and an excellent product contains more than 85% protein per scoop. 

Takeaway: Transparent Labs Grass-Fed Whey Protein exceeds our criteria for an excellent quality source of protein based on the protein percentage and high quality testing standards.

Highlights: What I Liked About Transparent Labs Grass-Fed Whey Protein

Clean, Quality Ingredients With No Additives 

The unflavored Grass-Fed whey only contains 2 ingredients: Whey Protein and Sunflower Lecithin (which is used to prevent clumps and grittiness). Most of the flavored varieties only contain around 4 additional ingredients: natural flavors, salt, stevia, and then something like cocoa or peanut flour for taste. 

There are no unnecessary additives or preservatives, and the certificates of analysis reassure that there are no harmful ingredients like lead or mercury in their products. 

There are no soy-based preservatives added and no artificial flavors or colors (which is a big problem with other protein powders). 

• Transparent Labs made our list as one of the Best Protein Powder with Stevia (check out our full review)

To really drive home Transparent Labs’ commitment to quality, the added Informed Protein and Informed Choice certifications also verify the total protein content, ensuring that the 28g that is listed on the label is actual whole protein. 

Great Taste That Appeals to A Wide Audience

Transparent Labs Grass-Fed Whey Protein offers a bold, rich taste without being too sweet. The use of no artificial flavors or sweeteners makes it more appealing to a broader population that finds those types of sweeteners upset their stomach or make them bloated. 

Even though artificial sweeteners have been proven safe in hundreds of clinical trials, many peoplecomplain about a bad aftertaste left by sweeteners like sucralose and acesulfame potassium. 

Stevia is the last ingredient listed on the isolate, meaning that it’s the ingredient that is used in the smallest quantity (between 160-185mg). 

The combination of cocoa, peanut flower, natural flavors, and salt is perfect for giving this product a nice rich taste without being overbearingly sweet (you can always make your protein powder sweeter, check out this article for how to do that). 

Transparent Labs keeps adding to the flavor options available. Currently, there are as many as 20 different flavors available in the Transparent Labs Grass-Fed Whey including the newly added Chocolate Hazelnut, Milk and Cookies, and Vanilla and Peppermint. 

Good Mixability With No Chunks or Chalkiness

Transparent Labs Grass-Fed Whey Protein mixes up easily without having to use a fancy shaker cup or blender. It has no clumps and has a smooth, creamy texture.

Oftentimes a lot of isolate proteins are mixed up really thin and can leave a chalky residue feeling in the mouth, or on the side of the shaker. 

Transparent Labs Grass-Fed Whey Protein mixes up completely, leaving no chunks or chalkiness. It has a nice creamy texture and is enjoyable to drink with milk, water, and almond milk. 

When stirred into yogurt or oatmeal, it dissolves completely. 

Drawbacks: What I Didn’t Like About Transparent Labs

The Cost Per Scoop Is Above The Average

For the quality, I think that Transparent Labs is worth the price.  But at $2 per serving, it might be an out-of-budget option for consumers

It’s not fair to evaluate all protein powders on the same scale, though. When we consider that Transparent Labs has the highest testing and certification standards in the industry while also having among the highest protein percentages and protein content at 28g per scoop, other comparable products cost as much as $3.00 per serving.  

On the other end of the scale, a product like Six Star Whey Protein is $1.00 per serving, which is half the cost of Transparent Labs, but it only has 58-66% of protein per scoop.  

Sure, you’re paying less, but for a protein powder, 58-66% of protein per scoop is totally unacceptable.  

I did find another protein powder (which we haven’t tested yet) called Believe Supplements that has a similar protein content per scoop as Transparent Labs and comes in at $1.75 per serving. 

But, that product doesn’t use grass-fed whey protein and uses artificial flavors and sweeteners. 

So I still think Transparent Labs is justified in charging $2 per serving.  

If you want the quality of Transparent Labs, you can use their subscribe and save feature to save 15% off each tub, and earn free shipping. This brings the cost down to $1.70 per serving, which is more in line with other isolate products on the market.

Transparent Labs Review: My Experience

This protein powder quickly became my favorite, and I now use it as my go-to protein day-to-day. 

For an isolate with no artificial flavors, I wasn’t expecting it to taste as good as it does. 

I have tried other grass-fed whey isolates in the past and my experience has typically been that they either use artificial sweeteners or added sugar to their formulas, or they mix up really thin and taste bland. 

This product checked all of the boxes in regard to taste, mixability, and texture. 

Isolate proteins typically digest pretty quickly, at a rate of about 10g of protein per hour. With nearly 30g of protein per scoop, you would expect this product to keep you full for between 2 and 3 hours, which I found to be pretty accurate. 

I would have one scoop of water post-workout (around 8:00 am) and didn’t find myself looking for something else to eat until around 11:00 am. (Note for transparency: I drink my morning coffee at around 9:00 am, which could contribute to longer feelings of satiety as well). 

I have started enjoying this protein mixed with plain greek yogurt as a late-night, sweet snack. This combination is great any time of day as a snack to keep you full and is great at curbing sweet-tooth cravings. 

With the recent additions to the Transparent Labs flavor lineup, I find that my personal stock is rapidly expanding. I have a Ninja Creami, and I am obsessed with using the ice cream flavors like Neapolitan and Mint Chocolate Chip to make protein ice cream.

How Does Transparent Labs Stack Up Against Our Criteria For Whey Protein

At FeastGood, we have 8 different criteria for ranking whey protein powders.  Here’s how Transparent Labs Grass-Fed Whey Protein Protein stacked up:

1. Nutrition Label Transparency 

Our rating: 5/5

This was the most transparent label I’ve found, indicating the exact amount of grams or milligrams of each ingredient. 

Not only are the exact ingredients listed on the label, but it’s also very easy to go to their website and search the lot number of your protein powder to find their certificate of analysis and certificate of composition to verify the quality and purity of your products. 

You don’t have to hunt for these or jump through hoops, everything is easily accessible on their website. 

2. Fat Content Transparency 

Our rating: 5/5

Transparent Labs Grass-Fed Whey Protein clearly indicates how much fat is in their protein powders. 

The fat content is 0g in transparent labs, which is not the case for other proteins like MuscleTech.  

3. Effective Ingredients 

Our rating: 5/5

Transparent Labs uses high-quality ingredients like grass-fed whey, but has no unnecessary flavors, colors, or preservatives in their product. 

They use a small amount of stevia to sweeten their protein, but otherwise use only natural flavors, cocoa, peanut flour, and salt. 

The Informed Choice and Informed Protein certifications ensure that there are no contaminants in the product and that the protein content is accurate.

4. Protein Percent of Calories

Our rating: 5/5

At 86% protein per scoop, Transparent Labs has one of the highest protein percentages that we’ve come across. 

Our criteria for a great whey protein powder is one that contains at least 85% protein per scoop. The Transparent Labs Grass-Fed Whey Protein is within our excellent criteria.

5. Taste/Flavor

Our rating: 4.5/5

Even without the use of artificial flavors or sweeteners, Transparent Labs Grass-Fed Whey Protein offers a bold, rich taste.

I am only docking points because I have not had a chance to go back and test the entire flavor lineup, so I will leave half a mark in case some of the other flavors don’t stack up. 

There is also the chance that you are in the population who finds the taste of stevia overbearing or bitter and may not like the taste of this product for that reason.

Worth mentioning, this is definitely more of a dark chocolate/cocoa flavor than sweet milk chocolate.

6. Mixability

Our rating: 5/5

Transparent Labs Grass-Fed Whey Protein mixed up easily and completely.  

I didn’t have to use a blender or fork/whisk to break up the powder. 

7. Texture (Thick or Thin)

Our rating: thick

For a whey isolate with no thickening ingredients, Transparent Labs Grass-Fed Whey Protein still mixed up with a nice, creamy texture. 

I was surprised that as an isolate it mixed up so creamy. Sometimes isolate proteins can have a watery texture but this one drank thick and smooth. 

I am calling this one “thick for an isolate” because it’s still not quite as thick as some slower-digesting proteins like casein, but it was definitely thicker than some other isolates I have tried. 

8. Satiety

Our rating: 3.5/5

This product falls in line with other whey proteins that provide around 2h of satiety when mixed with water. When added to milk, oats, or yogurt the feeling of satiety is prolonged. 

I found that when I took this isolate on an empty stomach mixed just with water, I felt hungry again about 2 hours later, which is typical for an isolate. 

If you are looking for a product to give a longer feeling of satiety and fullness, opt for a whey concentrate or a casein protein (like Transparent Labs casein) which digests at a rate closer to 6-7g per hour versus the isolate’s digestion rate of 10g per hour. 

Alternatively, you can mix your protein with something other than water, like milk, yogurt, or oats, or with a piece of fruit on the side to help keep you fuller longer. 

Who Is Transparent Labs Grass-Fed Whey Protein Protein Isolate For? 

Transparent Labs Grass-Fed Whey Protein is for: 

• Someone who cares about high-quality ingredients. They use simple, clean ingredients with no added flavours, colors, or preservatives. 

• Someone with lactose sensitivity. Transparent Labs Grass-Fed Whey Protein Isolate is very low in sugar, and can be assumed to be virtually lactose-free. (This applies to people with light lactose sensitivities, and cannot be applied to people with strong dairy allergies).

• Someone who wants no artificial flavors or colors. Transparent Labs uses only natural flavors and stevia to sweeten their products and uses no artificial flavors, colors, or preservatives. 

Who Shouldn’t Take Transparent Labs?

Transparent Labs Grass-Fed Whey Protein protein is not for: 

• Someone on a budget. The Isolate is on the high end of the spectrum as far as cost, coming in at $2.00 per serving. This might not fall within everyone’s budget

• Someone sensitive to stevia. If you are part of the population who suffers from stevia headaches or gets a strong bitter taste from stevia, then the appeal of using no artificial sweeteners might not be a net positive for you. 

But really, that’s it. If the product fits into your budget then unless you have a severe dairy allergy or follow a vegan diet, then there is no reason why you shouldn’t take the Transparent Labs Grass-fed Whey Isolate.

Transparent Labs Customer Reviews

Something that has changed in the years since I wrote my initial Transparent Labs review is that they now sell through third party online retailers like Amazon. 

On Amazon.com, Transparent Labs Grass-Fed Whey Protein has a 4.5/5 star rating on nearly 3,000 reviews. 

Three years ago when I was first introduced to Transparent Labs Grass-Fed Whey Protein, they were only available on their own website where they had a 4.5/5 star rating on around 2,100 reviews. 

Currently, that rating has jumped to 4.7 out of 5 stars with more than 6,000 reviews. 

The fact that Transparent Labs has increased their overall rating while nearly tripling the amount of reviews they have shows that not only are people still liking this product years later, but the changes that Transparent Labs have made over the past few year are positive ones.

Most of the reviews boast the same things I talked about already: Great taste, mixes well, and excellent quality ingredients. 

I couldn’t find many negative reviews (most are usually issues with shipping from Amazon or products arriving damaged, which isn’t necessarily the company’s fault), though some customers did express that they found the product too expensive or too sweet. 

When browsing Reddit and Quora threads for high-quality protein recommendations, Transparent Labs was often mentioned at the top of the list. 

Transparent Labs Promotions & Discounts

The only promotion or discount offer I found for Transparent Labs was to use the subscribe and save feature through their website. 

This allows you to instantly save 15% off your order. You can cancel or pause your subscription at any time and you can choose your shipping frequency (to be every 30, 45, or 60 days). 

Where To Buy Transparent Labs? 

The best place to buy Transparent Labs products is directly from the Transparent Labs website. 

First of all, if you are looking for the best deals you are more likely to find them by subscribing to the Transparent Labs mailing list to take advantage of seasonal sales. 

Secondly, if you have issues with your product and need to do a return or exchange, it is much easier to do so if you have purchased directly from the company. 

You can find Transparent Labs Grass-Fed Whey on Amazon.com, but they do not carry the full flavor selection. 

The website does have a store locator to find storefront retailers near you. There are now more than 1700 locations across the USA which sell Transparent Labs Products.

Transparent Labs Alternatives? 

Perfect Sports Diesel

This is another grass-fed whey isolate with minimal added ingredients. If you invest in the 5lb tub of Diesel Isolate, the cost comes down to $1.00 per serving which makes it a more budget-friendly option. 

(Note that if you buy Diesel in the 2lb size, the cost is $2.00, just like the Transparent Labs option). 

Perfect Sports Diesel does not come with the same third-party testing and quality guarantee that Transparent Labs does, but if budget is the bottom line then Diesel is a great option. 

Transparent Labs Vegan

If you want the quality of Transparent Labs, but have a dairy allergy or strong sensitivity then you can consider Transparent Labs Vegan Protein. 

Transparent Labs uses a blend of rice and pea protein to give you a complete amino acid profile and offers 24g of protein per serving. 

At $1.66 per serving ($1.41 if you choose the Subscribe and Save option) it’s a great, high quality alternative to their whey isolate counterpart. 

Transparent Labs: Protein Comparisons & Reviews

• Transparent Labs vs Optimum Nutrition Protein
• Transparent Labs vs Legion Protein
• Transparent Labs vs Dymatize Iso 100
• Transparent Labs vs Thorne
• I Tried Transparent Labs Mass Gainer For 30 Days (Review)

What Flavors Are Available For Transparent Labs? 

Transparent Labs Grass-Fed Whey Protein is currently available in 20 flavors: Milk Chocolate, French Vanilla, Chocolate Peanut Butter, Dark Chocolate, Chocolate Hazelnut, Milk and Cookies, Vanilla Peppermint, Oatmeal Chocolate Chip Cookie, Strawberry Milkshake, Blueberry Pancakes, Vanilla Peanut Butter, Mocha, Salted Chocolate Caramel, Cinnamon French Toast, S’Mores, Mint Chocolate Chip, Chocolate Pretzel, Butterscotch Pecan, Neapolitan, and Unfalvored.