Best whey protein 2025: a dietitian’s opinion (15 brands)

What are the best whey proteins on the market? Maxime Mességué, a dietitian nutritionist, analyzed 15 brands in detail using 6 criteria to produce this benchmark comparison. Discover the top 3 whey proteins to maximize your muscle-gain and weight-loss goals.

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Notes sur 5	NOTE
Best unflavored whey 🥇 > Nutripure	5.0	SEE PRICE
Best flavored whey 🍫 > Nutri&co	5.0	SEE PRICE
Best value for money 💸 > Pure AM nutrition	4.4	SEE PRICE
Nutrimuscle	4.4
Protein Works	4.4
Foodspring	4.2
Optimum Nutrition	4.2
BiotechUSA	4.0
Eiyolab	4.0
My Protein	4.0
Bulk	3.8
NU3	3.8
EAfit	3.6
Scitec Nutrition	3.4
AMFIT	3.2

Whey comes from the dairy industry; it is derived from milk serum, also called whey. Milk serum is obtained when milk coagulates during the cheese-making process.

This whey contains mainly lactose and small soluble proteins rich in essential amino acids. Its biological value (the degree of assimilation and the quality of amino acids) is 104 to 114, which makes it one of the best proteins.

It’s easy to understand why athletes have gotten into the habit of consuming it to meet their protein needs and to increase their muscle mass.

But there are many types of whey, and even more brands: it’s becoming increasingly complicated to make sense of labels and therefore to make the right choice.

To make things clearer,  I tested and compared 15 whey products among the best-selling online, I rated them according to 5 quality criteria, then I selected the top 3 products.

Tested brands : AMFIT, BiotechUSA, Bulk, EAfit, Eiyolab, Foodspring, My Protein, NU3, Nutri&Co, Nutrimuscle, Nutripure, Optimum Nutrition, Protein Works, Pure AM Nutrition, Scitec Nutrition.

We evaluate all dietary supplements independently. If you click on one of the links provided, we may receive a commission, which does not affect the price or the ranking.

Best whey proteins: my opinion

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#1: BEST UNFLAVORED WHEY 🥇

Nutripure is a French brand created in 2018 by two brothers who are elite athletes. Their ambition is to create a brand of “perfect” dietary supplements, meaning free of controversial substances and of optimal quality. 

Nutripure Native Whey Isolate contains 94 g of protein per 100 g with 22.4 g of BCAAs per 100 g, which is particularly high.  It contains very little fat (1.9 g) and carbohydrates (3 g).

This whey is native, sourced from fresh milk from French pastures. The proteins are isolated by cold microfiltration. They therefore remain intact and are not denatured by heat treatment. 

Nutripure forgoes all controversial substances: this whey contains only milk protein isolate and sunflower lecithin, an emulsifier that isn’t problematic. The powder mixes very well, so it doesn’t clump.

There’s also a cocoa version that adds an indulgent touch without an artificial aftertaste, though I would have preferred a slightly sweeter taste.

This whey is one of the most expensive in our comparison (46.5 euros per kg), but the price is perfectly justified by the quality of the product.

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BEST FLAVORED WHEY

Nutri&Co is a French brand created in 2017. It specializes in the sale of dietary supplements designed to improve health, beauty, and athletic performance. Its goal is to provide the best possible quality with simple formulas and no controversial ingredients, at a fair price.

Nutri&Co chocolate-flavored native whey isolate contains 83 g of protein per 100 g with 24.8 g of BCAAs. This composition is very rare for a whey protein, which reflects exceptional milk quality. It contains 5.3 g of carbohydrates, which is on the low end of the comparison.

Nutri&Co whey is native, so it does not come from the cheesemaking industry’s whey but directly from milk. The proteins are cold-extracted by microfiltration, which preserves their quality.

The milk used to make the whey comes from cows on French pastures, it’s the best possible quality for whey available today.

Nutri&Co whey contains only 2 additives: xanthan gum and sunflower lecithin. They are not controversial. The brand has chosen not to use any artificial sweeteners: for sweetness, only steviol glycoside (from stevia) is used.

The powder mixes well and doesn’t clump, its chocolate flavor is pleasant, with no chemical aftertaste.

Nutri&Co also has an excellent rating of 4.5/5 on Trustpilot, with many positive reviews highlighting product quality, brand transparency, and responsive customer service.

This whey is among the most expensive on the market at €49.90 per kg, but quality comes at a price!

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BEST VALUE FOR MONEY

PURE AM Nutrition is a French brand founded in 2017, specializing in dietary supplements for athletes. It is part of the N4Brands group, which also owns FitnessBoutique, the leading retailer in France for fitness equipment and sports nutrition products.

AM Nutrition whey isolate contains 85 g of protein per 100 g, with 17.5 g of BCAAs: it’s an excellent composition.

It contains very little fat (1.4 g per 100 g) but a rather high amount of carbohydrates (9 g). This is uncommon for an isolate. This indicates a higher amount of lactose than some isolates. This can be problematic for sensitive or intolerant individuals.

AM Nutrition whey is native, it does not come from a by-product of the cheese industry but directly from milk: therefore it is of higher quality because no heat treatment is used for protein extraction.

The milk used is French.

Its sweet taste is provided by a blend of sweeteners: steviol glycoside (natural) and sucralose (synthetic and sometimes considered controversial). I tried AM Nutrition whey, vanilla flavor: I really liked its taste, just sweet enough.

I was less of a fan of the rather liquid and foamy texture on the surface, with a few lumps. This texture likely comes from the absence of a texturizing agent in the formula.

This native whey isolate is available at a very reasonable price given its premium quality and formulation. It costs €34.20 per kg when using a -20% promo code that’s always available on the site: it’s unbeatable.

For me, it’s the whey with the best price-to-quality ratio.

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The other whey proteins in the comparison

Protein Works – Whey Protein 80

A whey concentrate at an attractive price, with a well-balanced chocolate flavor and a creamy texture. It mixes easily and is very pleasant to drink. Its protein content is good for a whey concentrate.

Despite the presence of a few additives, the lack of information about its origin, and the lack of details on the amino acid profile, it remains a compelling option for budget-conscious buyers.

Nutrimuscle – Native whey isolate

Nutrimuscle is a French brand known for its transparency and the quality of its products, notably its native whey isolate, which is high in protein (81.2 g/100 g) and BCAAs. Despite a relatively high carbohydrate content for an isolate (7.2 g), the presence of lactase allows for good digestive tolerance.

The formula stands out for the absence of glycomacropeptides, the presence of prebiotics and probiotics, and a smooth texture with a pleasant cocoa flavor. Priced at €42.90/kg, it offers excellent value for the price, despite the use of sucralose, a controversial sweetener.

Foodspring – Whey Protein

A blend of whey concentrate and isolate, with a wide range of original flavors and an overall creamy texture, though a few clumps are possible.

Sourced from the milk of grass-fed, pasture-raised cows in New Zealand, it stands out for the low amount of protein it offers, the lowest in our comparison. I also question the relevance of sourcing from so far away for a quality that still has room for improvement.

Optimum Nutrition – Gold Standard 100% Whey

A legacy brand, this whey combines isolate, concentrate, and hydrolysate for fast absorption. I appreciated the chocolate flavor for its balance, with a smooth, lump-free texture. The protein content is decent for a blend, but the BCAA levels could be better.

This whey also contains controversial sweeteners. It’s also a shame that there’s no information about the origin of the ingredients: a bit more transparency would be welcome.

BiotechUSA – Iso Whey Zero

Very high in protein with added BCAAs and glutamine, this whey stands out for its native quality. The chocolate flavor is not very sweet, the texture is creamy, and the solubility is impeccable. It is clearly positioned in the high-end segment, with a price to match.

However, the presence of 7 additives is excessive for a whey at this level, and the lack of information about its origin is regrettable.

Eiyolab – Isolate HT

Very high-protein whey isolate (86%), with an exemplary 20 g of BCAAs. Its texture is quite thin, highly soluble, and free of lumps.

The milk used comes from Europe, which is a good point, but that’s still a bit vague: I wish there were more information on traceability. Sensitive palates take note: the sweetness is particularly pronounced.

My Protein – Impact Whey Protein

Ultra-popular whey concentrate with a wide selection of flavors (36!). The chocolate flavor is very sweet, but indulgent. The texture is smooth, and solubility is good, making it an ideal option for regular use at a low price.

Protein content is average, but the amount of BCAAs is still appealing. However, there is a real lack of traceability, which is unfortunate.

Bulk – Pure Whey Protein

This whey concentrate has a decent protein content—though not optimal—and a rather low amount of BCAAs compared with other whey products on the market. Overall, I find it well balanced, with a creamy texture, even if it can sometimes form clumps. The vanilla flavor is classic and nicely balanced. It comes from the milk of pasture-raised cows, which is appreciated, especially at this price.

We know it comes from Europe, but I’d like more detail for complete traceability.

NU3 – Performance Whey

This whey has one of the lowest protein and BCAA contents in our comparison, which limits its appeal from a nutritional standpoint. It’s still pleasant to consume: sweet, creamy, with very good solubility.

The vanilla flavor is intense, even too intense for me. It contains 3 non-controversial additives, which is rather reassuring, although I regret the lack of traceability. 

EAfit – Pure Whey

This whey is a blend of concentrate, isolate, and hydrolysate, enriched with vitamins and enzymes. It has an average protein content (76%) and a BCAA content that is also lower than other products in the comparison. The double chocolate flavor is light and pleasant, the texture is smooth, and it dissolves very well.

I regret the presence of several controversial sweeteners, as well as an overly high number of additives in general, some of which raise concerns. Another weak point: the total lack of information on the origin of the milk.

Scitec Nutrition – 100% Whey Protein Professional

This concentrated whey is enriched with enzymes, glutamine, and BCAAs, but despite that, it contains little protein and a small amount of BCAAs compared with the other wheys in the comparison. It contains two controversial sweeteners, which gives it a very sweet and heavily flavored taste.

The texture is creamy, but I find the aftertaste a bit too persistent. In terms of solubility, nothing to complain about; it’s perfect. However, there is a real lack of transparency about the origin of the milk, and its price is clearly high given the quality offered.

AMFIT – Whey Protein

This simple and very affordable whey is a blend of concentrate and isolate. The amount of protein is not particularly high, and the lack of an amino acid profile makes it impossible to know the actual BCAA content, which is a shame. Its texture is a bit gritty, the strawberry flavor remains subtle, and a few lumps may appear.

It’s still fine for starting out or as a stopgap, but I regret the lack of transparency about the origin of the milk and the formulation. This clearly shows in its low overall score.

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Complete ranking

Notes sur 5	Note globale	Nutrition	Sécurité	Gout	Solubilité	Marque
# Best flavored whey 🍫 > Nutri&co – Native Whey Isolate	5.0	5	5	5	5	5
# Best unflavored whey 🥇 > Nutripure – Native Whey Isolate	4.8	5	5	4	5	5
# Best value for money 💸 > Pure AM nutrition – Pure Whey Isolate	4.4	5	4	5	4	4
Nutrimuscle	4.4	5	4	4	5	4
Protein Works	4.4	4	3	5	5	5
Foodspring	4.2	4	4	5	4	4
Optimum Nutrition	4.2	4	3	5	5	4
BiotechUSA	4.0	4	3	5	5	3
Eiyolab	4.0	5	4	3	5	3
My Protein	4.0	4	4	4	5	3
Bulk	3.8	3	4	5	3	4
NU3	3.8	3	3	4	5	4
EAfit	3.6	4	3	2	5	4
Scitec Nutrition	3.4	3	3	3	5	3
AMFIT	3.2	3	3	4	4	2

→ Access my full comparison table here (Google Sheet)

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My rating criteria

To compile this comparison, I defined 5 qualitative criteria based on the products’ characteristics and on my testing of each of the 15 whey proteins.

Each criterion has a score out of 5, and the average of the 5 criteria determined my ranking.

For each whey, I also looked at the price per kg, to highlight the best options in terms of value for money

→ Access my complete comparison table here (Google Sheet)

1. Nutritional value

To compare the nutritional value of the different whey proteins, I relied on two main criteria: their protein content and their BCAA content.

To make the comparison as fair as possible, I checked the ingredients and nutrition facts of the chocolate-flavored versions, which are generally the most commonly consumed.

In general, the more protein a whey contains, the fewer carbohydrates and fats it contains — which is a good indicator of quality.

Conversely, when the protein content is lower, you often find more so-called “filler” ingredients.

BCAA (branched-chain amino acids) content is also an essential criterion. The more BCAAs a whey protein contains, the more effective it will be for supporting muscle building. It is also a reflection of the quality of the milk used and of a gentle extraction process, which helps preserve the integrity of the proteins without denaturing them.

2. Safety

To rate the safety of the different whey proteins, I used 4 sub-criteria: 

• The origin of the milk used and how the cows are fed
  Thus, pasture-raised or grass-fed cows produce higher-quality milk than cows from intensive farming.

• Native quality or not
  When whey is native, filtration is done cold, which helps maintain the full integrity of the proteins. 

• The number of additives and texturizing agents
  Most of the texturizing agents used are not controversial, but their presence in large quantities is not ideal for the body. On a daily basis, aim to choose products with the shortest possible ingredient list.

• The sweeteners used
  There are 3: sucralose, acesulfame K, and steviol glycoside. The first two are controversial, whereas steviol glycoside appears for now to be harmless.

3. Brand reputation

To assess the reputation of the different whey brands, I looked at several data points:

• The brand’s longevity
  A brand that has been around for several years (or decades) has often proven itself. It has managed to retain its customers and maintain a certain level of quality. For me, that’s a real sign of reliability.

• Presence on Instagram
  I also looked at the size of communities on Instagram. It’s not the most decisive factor, but it gives an idea of the engagement around the brand and the relationship it has with its customers.

• Customer reviews
  I relied on the feedback available on platforms like Amazon, Trustpilot, or Avis Vérifiés (depending on the one most used for each brand). I did not take into account the ratings of brands with fewer than 100 reviews, as that seems too unrepresentative to me. On the contrary, a large number of positive reviews is a strong sign of customer satisfaction and therefore a good indicator of trust.

4. Solubility

A whey protein that mixes well and doesn’t clump is pleasant to consume.

So I tested the solubility of the 15 brands by mixing 30 g of whey with 250 ml of water in a shaker. Each whey was shaken for 10 seconds to ensure a fair comparison.

5. Taste

This part is more subjective, so I based it on my personal tastes!

I evaluated:

• Texture, prioritizing creamy textures 
• Sweetness intensity, prioritizing less sweet whey.
• The naturalness of taste, by favoring natural flavors and penalizing overly chemical flavors

6. Price per kg

I always compared the prices of the “small” sizes, the pouches ranging from 750 g to 1 kg. In fact, prices vary greatly depending on the quantity: the more you buy, the lower the price per kg.

When a discount is applied permanently, it was factored into the final price for the comparison.

The price per kg does not factor into the calculation of the final score, but it helps to have a clear view of the value for money offered by each brand.

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The different types of whey

Whey concentrate

It’s the best-selling whey on the market. Concentrated whey mainly comes from the cheese industry. 

During cheese making, casein (a solid protein) is separated from whey (or lactoserum) using a high-temperature heat treatment. This treatment denatures some of the proteins. The whey is then dehydrated, which yields concentrated whey. 

It contains about 80% protein, but also fats and lactose. Its cost is relatively low, which makes it an appealing option for tight budgets. However, people who are sensitive to lactose should be careful because it is less digestible.

Native whey

Native whey does not come from the cheese industry. The whey is separated from casein by cold filtration directly from milk. There is no protein denaturation.

This whey is purer and therefore better absorbed and more digestible. It is considered a high-quality whey. However, its more demanding manufacturing process makes it more expensive.

Whey isolate

Whey isolate is a concentrated whey that has undergone additional filtration. It has been stripped of much of its fat and lactose. 

It is particularly beneficial for people who are lactose intolerant, or for those who want to add as few calories as possible to their diet.

Its nutritional richness is exceptional because it contains about 90% protein, but its production is more expensive.

Good to know: whey can be both native and isolate. This is the best quality on the market.

📚 Also read | Best whey isolate: a dietitian’s selection

Hydrolyzed whey

Hydrolyzed whey is a whey isolate that has undergone additional enzymatic treatment. This process results in a kind of protein pre-digestion, making them more quickly absorbed by the body.

It’s the most processed form of whey, but also the most digestible. It’s ideal for people with digestive issues or for athletes in sports that require immediate protein intake: very intense training or competitions.

It is generally more expensive and has a more bitter taste, because hydrolysis releases peptides with a more pronounced flavor. Even when it is flavored, hydrolyzed whey is less pleasant to consume than other types. This is a factor to consider before choosing it.

Vegan whey

The vegan whey does not exist: by definition, whey comes from milk and therefore contains animal proteins.

However, there are many 100% plant-based alternatives in the form of protein powders.

These substitutes, suitable for vegan diets, are often made from a blend of pea, rice, hemp, and soy proteins to ensure a complete amino acid profile.

📚 Read also | Comparison of the best plant-based protein powders

Frequently Asked Questions (FAQ)

What is whey used for?

Whey protein is a quick and easily absorbed source of protein, used to meet increased protein needs, especially with regular or intensive exercise.

It contains all the essential amino acids and is high in BCAAs, making it an excellent support for recovery and muscle growth. Thanks to its composition, whey protein is digested quickly, allowing muscles to receive what they need immediately after exercise.

In summary, whey protein is not a meal replacement, but a practical supplement to optimize your protein intake, promote recovery, and support muscle building, especially after training.

How much whey should you consume per day?

The amount of whey to consume depends on your overall protein needs, which vary based on your weight, your level of physical activity, your goals (muscle gain, maintenance, weight loss), and what you eat.

If your diet covers a good portion of your needs, whey can simply be used as a supplement.

In general, I recommend about 20 to 30 g of whey after a workout to support muscle recovery. That’s a standard serving, easy to fit into the day.

There’s no need to consume it in excess: what matters is the balance of your overall protein intake over the course of the day, not the amount of whey itself.

How many times a day can you take whey?

Once again, there’s no universal rule. It all depends on your protein needs and what you already consume through your diet.

For example, a person who eats a lot of meat, fish, eggs, or dairy products will probably not need more than one serving (if any). Conversely, someone who follows a diet low in animal products or has very high needs (intense training, bulking) can take it twice a day.

What matters isn’t the number of servings, but the total amount of protein over the day. Whey simply complements your diet; it doesn’t replace it.

Where can you buy whey?

You can easily find whey online or in stores.

You can find it in stores specializing in sports nutrition, in some large sporting goods stores, and even in pharmacies. And of course, online, either on platforms like Amazon, or directly on the brands’ websites, which sometimes lets you benefit from advice or exclusive promotions.

As part of our test, we ordered whey on Amazon or directly from the brands through their online stores.

The most important thing is to choose a brand that is transparent about its ingredients, with good ingredient traceability.

When should you take whey?

There’s no single time that works for everyone, but some times are more beneficial depending on your goals.

The most common time would be right after your workout: muscles are more receptive to protein, and whey, which is absorbed quickly, helps optimize recovery and muscle rebuilding.

You can also have it as a snack, especially if meals are spaced out or low in protein, or add it to a meal (in oatmeal, a smoothie, etc.) to increase the protein content.

The main thing to remember is that spreading your protein intake throughout the day is more effective than concentrating it all into a single meal or only after a workout. The body uses protein better when it’s spread out regularly, matching your needs at each time of day.

Whey or casein?

Whey, or lactoserum, comes from the liquid part of milk left after coagulation. It contains small, soluble proteins that are easy to digest and quickly absorbed. That’s what makes it an excellent choice right after a workout, to quickly supply the muscles with the amino acids they need.

Casein comes from the solid part of milk, found in particular in yogurts, fromage blanc, skyr, faisselle… These are larger, slower-to-digest proteins, and sometimes less well tolerated depending on the person.

So the way it’s used is different: casein is often taken in the evening to slowly release protein throughout the night, which helps limit muscle catabolism (the breakdown of muscle).

That said, casein is mainly for those who have very high protein needs, such as people engaged in very intensive training like bodybuilding. For most people who train, whey is more than enough.

Whey or BCAAs?

BCAAs (valine, leucine, isoleucine) are three essential amino acids: the body can’t make them; they have to come from your diet. They play a key role in building muscle and recovery. Without them, protein synthesis isn’t efficient.

That said, if you use a quality whey, you’re already getting a good dose of BCAAs, so it’s not necessary to add more, except in very specific cases.

Taking BCAAs can be useful right before a workout, particularly to limit muscle breakdown during long or intense sessions. But if your overall protein intake is sufficient, it’s not essential.

In summary:

• BCAAs are already present in sufficient amounts in a quality whey protein
  
• Taking extra BCAAs is only useful in certain very specific contexts
  
• The priority is still to have adequate protein intake throughout the day

📚 Also read | Comparison of the best BCAAs

Whey or creatine?

It’s a question I get a lot, and in reality… they’re two very different things.

Creatine is an amino acid derivative that occurs naturally in the body, especially in the muscles and the brain. It is produced by the kidneys, liver, and pancreas from three amino acids: arginine, glycine, and methionine. Its role is to provide energy quickly during short, intense efforts. It is therefore particularly useful for strength, power, or bodybuilding sports.

Whey, on the other hand, is a source of protein. It helps support muscle recovery and the development of lean mass after exercise. It has nothing to do with creatine, then.

In summary:

• Creatine boosts performance during training.
• Whey protein helps with recovery and muscle building.

The two can be complementary, depending on your goals.

📚 Read also | What is the best creatine on the market?

Does whey help you lose weight?

No, whey protein is not a weight-loss product. Its main role is to support the growth or maintenance of muscle mass, especially in active individuals.

However, building muscle mass helps increase basal metabolic rate—that is, the amount of energy the body burns at rest. In this context, if the diet is hypocaloric (caloric intake below needs), whey protein can help indirectly promote fat loss by limiting muscle loss and facilitating recovery.

Are there any risks or contraindications to consuming whey?

Whey itself is not dangerous. If it is used to supplement protein intake in a balanced diet, it can even be very helpful: for athletes, vegetarians, or simply those who have trouble meeting their daily protein needs.

But as with anything, it’s excess that’s the problem. When you consume too much protein over the long term, especially as part of a diet already too high in calories, there can be side effects: digestive issues, strain on the kidneys or liver, and even unwanted weight gain.

In some young people, a possible worsening of acne is also observed, especially with regular whey consumption in the context of an unbalanced diet.

People with renal insufficiency, even mild, should be very careful. In this case, it is strongly discouraged to consume whey without medical advice.

Is whey essential for building muscle?

No, clearly not. I’m often asked this question, and I’ll say it again: you can absolutely build muscle without ever touching a shaker. What matters is getting enough protein throughout the day, and that can work perfectly well with a regular diet: meat, fish, eggs, legumes, tofu, dairy products…

Whey is just a tool. It can help out when you have a busy schedule, a small appetite, or slightly higher needs. But it’s neither essential nor magical. If your meals are well put together, you can easily do without it.

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