Best Whey Protein Concentrate (2026)
The best whey protein concentrate for most people is Naked Whey: one ingredient, $1.84 per 25 g of protein, on the Informed Choice testing list. Of the 14 pure concentrates we priced, 3 are on a testing list, and Naked Whey is the only one of them with a single ingredient. All 14 are ranked below.
By Erin Rose Updated November 2026 How we score
Our pick for: Most people
- Per 25 g of protein
- $1.84$139.99 for 5 lb, 76 servings
- Protein
- 25 g a serving83% of the 30 g serving, 120 calories
- Ingredients
- OneWhey protein concentrate
- Testing list
- Informed ChoiceStore samples tested for banned drugs
- Sugar line
- 2 gNatural milk sugar; none added
- Smaller tub
- $2.10Per 25 g in the 2 lb tub, $62.99
Why we pick it If you want concentrate for a short label, this one lists nothing else. The brand says the whey comes from grass-fed cows. With no flavor, it goes into shakes, oatmeal or coffee.
What you give up It has no flavor, and it costs more than the other powders on a testing list. Those add sunflower lecithin, which helps powder mix.
All 14 whey concentrates, ranked
Powders on a testing list come first, then cheapest per 25 g of protein. 3 of the 14 are on a list. A powder with no listing is not a failed one: we found no entry for it.
| Powder | Ingredients | Protein | Sugars | Testing list | Cost per 25 g of protein | Buy |
|---|---|---|---|---|---|---|
 BulkSupplements Whey Protein ConcentrateUnflavored, 1 kg | Whey protein concentrate, sunflower lecithin | 23 g in 30 g (77%) | 1 g | NSF Certified for Sport | $1.58 | See on Amazon |
 NOW Sports Whey Protein ConcentrateUnflavored, 1.5 lb | Whey protein concentrate, sunflower lecithin | 24 g in 33 g (73%) | 1 g | Informed Sport | $1.67 | See on Amazon |
 Naked WheyOur pickUnflavored, 5 lb | Whey protein concentrate | 25 g in 30 g (83%) | 2 g | Informed Choice | $1.84 | See on Amazon |
 Raw Grass Fed WheyUnflavored, 5 lb | Whey protein concentrate | 21 g in 25 g (84%) | 1 g | Not on a testing list | $1.32 | See on Amazon |
 Nutricost Whey Protein ConcentrateUnflavored, 5 lb | Whey protein, sunflower lecithin | 25 g in 31 g (81%) | 1 g | Not on a testing list | $1.34 | See on Amazon |
 Nutricost Whey Protein ConcentrateVanilla, 5 lb | Whey protein concentrate, sunflower lecithin, natural flavors, sodium chloride, sucralose | 25 g in 33 g (76%) | 1 g | Not on a testing list | $1.42 | See on Amazon |
 TGS Nutrition WheyUnflavored, 5 lb | Whey protein concentrate, sunflower lecithin | 25 g in 30 g (83%) | 2 g | Not on a testing list | $1.65 | See on Amazon |
 Promix WheyUnflavored, 2.5 lb | Grass-fed whey concentrate, sunflower lecithin | 25 g in 31 g (81%) | 1 g | Not on a testing list | $1.73 | See on Amazon |
 Raw Organic WheyUnflavored, 5 lb | Organic whey protein concentrate | 21 g in 25 g (84%) | 1 g | Not on a testing list | $1.81 | See on Amazon |
 Levels Grass Fed WheyUnflavored, 5 lb | Whey protein concentrate, sunflower lecithin | 25 g in 32 g (78%) | 2 g | Not on a testing list | $1.83 | Naked Whey: also unflavored, $1.84 per 25 g |
 Promix One Ingredient WheyUnflavored, 2.2 lb (1 kg) | Grass-fed whey protein concentrate | 25 g in 31 g (81%) | 0 g | Not on a testing list | $2.00 | See on Amazon |
 Levels Grass Fed WheyVanilla Bean, 2 lb | Whey protein concentrate, vanilla extract, sunflower lecithin, sea salt, stevia, monk fruit | 24 g in 32 g (75%) | 2 g | Not on a testing list | $2.16 | See on Amazon |
 TGS Nutrition WheyVanilla, 2 lb | Whey protein concentrate, sunflower lecithin, cane sugar, salt, vanilla bean | 25 g in 38 g (66%) | 6 g | Not on a testing list | $2.29 | See on Amazon |
 Puori PW1 WheyUnflavored, 30 servings (1.98 lb) | Whey protein concentrate | 24 g in 30 g (80%) | 1 g | Not on a testing list | $2.74 | See on Amazon |
The best whey concentrate for your needs
Naked Whey suits most people. If one of these matters more to you, buy it instead.
Lowest cost on a testing list: BulkSupplements Whey Protein Concentrate
This 1 kg bag costs 14% less per 25 g than Naked Whey. NSF’s listing covers this bag size, and NSF tests each listed lot for banned drugs. A serving is 4 tablespoons.
BulkSupplements Whey Protein Concentrate
$1.58 per 25 g · 23 g of protein a serving · NSF Certified for Sport
Small tub, tested every batch: NOW Sports Whey Protein Concentrate
Informed Sport tests every batch before it ships. The 1.5 lb tub is an easy way to try plain concentrate, at $33.75, and it costs 9% less per 25 g than Naked Whey.
NOW Sports Whey Protein Concentrate
$1.67 per 25 g · 24 g of protein a serving · Informed Sport
Lowest cost overall: Raw Grass Fed Whey
Raw Grass Fed has one ingredient and the lowest cost of the 14: 28% less per 25 g than Naked Whey. We found no testing-list entry for it. A serving is smaller, 21 g of protein, so use a little more. Nutricost costs $1.34, with lecithin added.
Raw Grass Fed Whey
$1.32 per 25 g · 21 g of protein a serving · Not on a testing list
Flavored, no artificial sweetener: Levels Grass Fed Whey
Levels Vanilla Bean is concentrate sweetened with stevia and monk fruit, so you can drink it with water. The brand says the whey is grass-fed. It costs 17% more per 25 g than Naked Whey in this 2 lb tub. We found no testing-list entry for it.
Levels Grass Fed Whey
$2.16 per 25 g · 24 g of protein a serving · Not on a testing list
How do you know a tub is really concentrate?
Read the ingredient line, not the front of the tub. A pure concentrate names whey concentrate as its only protein. “100% whey” does not mean that. Optimum Nutrition Gold Standard lists isolate first, then concentrate. Dymatize Elite lists concentrate, isolate and hydrolyzed whey. MusclePharm Combat adds milk protein and egg. Those are fine powders, but they are blends, so they are not on this list.
One label here needs a note. Nutricost’s unflavored tub says only “whey protein” in its ingredients, while the brand sells it as whey protein concentrate.
Should you pay more for a one-ingredient powder?
Naked Whey is the pick for a short label, and the short label is not what sets the price. Raw Grass Fed costs $1.32 and Promix One Ingredient costs $2.00, and neither is on a testing list. BulkSupplements adds sunflower lecithin and costs $1.58 on NSF Certified for Sport. If you want the short label and a testing list, buy Naked Whey. If you want the lowest cost on a testing list, buy BulkSupplements Whey Protein Concentrate.
Is whey concentrate cheaper than isolate?
Yes. Against the 14 pure concentrates here, isolates cost about 25% more at the median. The best whey protein powder shows about 14% because it counts blends with the concentrates. The ranges overlap, so a cheap isolate can beat a costly concentrate. Isolate is filtered further to remove more of the milk sugar and fat, so pick one if concentrate bothers your stomach. See the best whey isolate. If it does not, concentrate is the better buy.
| Median of each kind | 14 pure concentrates | 14 isolates |
|---|---|---|
| Cost per 25 g of protein | $1.77 | $2.22 |
| Sugars on the label11 of the 14 isolates print a number | 1 g | 1 g |
How much lactose is in whey concentrate?
Not much, going by the label. Lactose is a sugar, so the sugar line is the most a serving can hold, and the unflavored powders here show 0 to 2 g. Labels round, so this is a ceiling, not a lactose test. A review of 36 randomized studies found 12 to 15 g of lactose, about a cup of milk, is well tolerated by most adults with lactose intolerance or malabsorption (Shaukat 2010). Most of those studies looked at malabsorption. If small amounts still bother you, see the best lactose-free protein powder.
Is concentrate less processed than isolate?
Yes. Both start as whey and are filtered, and isolate is filtered further. Federal rules describe concentrate as made by physical steps such as filtering (21 CFR 184.1979c). What gets added afterward differs far more from tub to tub, so compare the ingredients column. 5 of the 14 list one ingredient.
Does grass-fed whey concentrate cost more?
Yes, at the median. The 8 of the 14 sold as grass-fed cost a median $1.84 per 25 g, against $1.62 for the others. Grass-fed is the brand’s claim, not a test result, and it does not change the protein on the label. Buy it if you care how the cows were fed.
What does a testing list check?
Banned drugs, mainly. Informed Sport tests every batch before release. Informed Choice tests samples bought from stores at least monthly. NSF Certified for Sport tests listed lots and checks the label. Naked Whey’s Amazon title also says “NSF Certified”. NSF’s public list, read November 6, names other Naked products but not this whey, so we count Informed Choice only.
Is whey protein concentrate safe?
For most people, yes: it is milk protein, a common food. Skip it if you have a milk allergy. If you have kidney disease, ask your doctor before adding protein powder.
Whey tests lower in lead than plant powder. In a 2025 Clean Label Project study of about 160 powders, 28% of whey powders were over California’s Prop 65 lead level, against 77% of plant powders. Naked says independent testing puts its products “well under” FDA safety standards. Puori says the Clean Label Project tests each batch and offers results by batch number, and Promix says Eurofins tests each product.
Questions people ask
What does WPC80 mean?
It is a trade name for whey concentrate sold at about 80% protein. Federal rules only ask for 25% protein to call a powder whey protein concentrate (21 CFR 184.1979c), so check the label. The unflavored labels here run from 73% to 84% protein by serving weight.
Should I buy the big tub?
Buy it if you already know you like plain whey, because it costs less per gram of protein. Naked Whey costs $1.84 per 25 g in the 5 lb tub and $2.10 in the 2 lb tub. If you are trying concentrate for the first time, start small.
Is whey protein concentrate good for building muscle?
Yes, as a way to get more protein while you lift. A review of 49 trials, in healthy adults, found protein supplements added to gains in strength and muscle during weight training, about 0.3 kg of lean mass on average. Muscle gains stopped rising above about 1.6 g of protein per kg of body weight a day, counting food (Morton 2018). The review covered protein supplements in general, not concentrate alone. Work out your own number.
How we picked
We searched Amazon on November 6, 2026 and kept powders in stock whose label we could read for the tub we link, with no protein but whey concentrate. Prices are Amazon’s, and each row shows one tub. We left out tubs when we could not read the label for that exact size, including It’s Just, Muscle Feast, True Nutrition and Opportuniteas. Levels Vanilla Bean’s numbers come from the brand’s label for that flavor. Isolate figures use the 14 isolates on our best whey protein powder page. Testing lists were last read between September 22 and November 6.
Sources
- Shaukat A, et al. “Systematic review: effective management strategies for lactose intolerance.” Ann Intern Med. 2010. PubMed 20404262
- Morton RW, et al. “A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults.” Br J Sports Med. 2018. PubMed 28698222
- 21 CFR 184.1979c, Whey protein concentrate. law.cornell.edu
- Clean Label Project, 2024-25 Protein Powder Category Report, January 9, 2025. cleanlabelproject.org
- Labels: brand label panels and the NIH Dietary Supplement Label Database, read November 6, 2026.
- Testing lists: Informed Choice, Informed Sport, NSF Certified for Sport listing 1820661, NSF/ANSI 173 list for Naked.