The Best Unflavored Whey Protein Powder
The best unflavored whey protein is Naked Whey, with 25 g of protein a scoop. Naked says its only ingredient is grass-fed whey: no sweetener, flavor or gum. It costs $1.84 per 25 g of protein, and Informed Choice lists Naked Whey, so an outside lab tests it for banned drugs.
By Erin Rose Updated October 31, 2026 How we score
Our pick for: Most people
- Protein
- 25 g a scoopIn a 30 g scoop, 120 calories
- Per 25 g of protein
- $1.84At Amazon prices
- A tub
- $139.99Unflavored, 5 lb, 76 scoops
- Ingredients
- Whey onlyNo sweetener, flavor or gum
- Testing list
- Informed ChoiceScreens for banned drugs
Why we pick it It is the only powder here with one ingredient. That matters most in an unflavored powder, because you taste it in coffee, oats or a smoothie. It is our pick for the best protein powder overall, and Informed Choice lists it.
What you give up It is a concentrate, so it has more lactose than an isolate. BulkSupplements Whey Isolate costs about 15% less per 25 g, has less lactose and is on a stricter list, but it adds sunflower lecithin. Naked is the only one here with a single ingredient, which you taste in coffee or oats. See the other picks below.
The best unflavored whey for your needs
Naked Whey suits most people. If one of these matters more to you, buy the one made for it. Both are on NSF Certified for Sport.
Lactose bothers you: BulkSupplements Whey Isolate
BulkSupplements Whey Isolate is filtered further, so it has less lactose than a concentrate. Its only other ingredient is sunflower lecithin, which helps it mix. It is on NSF Certified for Sport, which also checks the label, and costs about 15% less than Naked per 25 g of protein.
BulkSupplements Whey Isolate
$1.57 per 25 g · $51.97 a tub (Unflavored, 1 kg) · 25 g of protein a scoop
Grass-fed isolate, smaller scoop: Momentous Whey Isolate
Momentous is grass-fed whey isolate with added digestive enzymes. NSF Certified for Sport lists the unflavored tub (listing 1518123). A scoop has 20 g of protein and 90 calories. It costs about 90% more than Naked per 25 g of protein.
Momentous Whey Isolate
$3.50 per 25 g · $69.99 a tub (Unflavored, 25 scoops) · 20 g of protein a scoop
How to choose an unflavored whey
Read the ingredient list
"Unflavored" means no added flavor. Some unflavored powders still add sweeteners, gums or lecithin. If you want plain whey, look for one ingredient.
Pick isolate if lactose bothers you
Isolate is filtered further than concentrate. It is typically 0.5 to 1% lactose, against 4 to 8% for an 80% protein concentrate like Naked Whey (U.S. Dairy Export Council spec sheets). It is still milk, so it is not safe with a milk allergy.
Buy one on a testing list
A testing list checks the tub. Informed Choice and NSF Certified for Sport both screen for drugs banned in sport. See which protein powders are third-party tested.
3 unflavored whey powders compared
Cheapest per 25 g of protein first, at Amazon prices checked November 2, 2026. Some prices include an Amazon deal that day, so the order can change.
| Powder | Cost per 25 g of protein | Why it is or is not the pick |
|---|---|---|
| BulkSupplements Whey IsolateIsolate · Whey isolate, sunflower lecithin · NSF Certified for Sport | $1.57 | Less lactose; lowest cost; adds sunflower lecithin |
| Naked WheyConcentrate · Whey only · Informed Choice | $1.84 | Our pick: one ingredient, no sweetener |
| Momentous Whey IsolateIsolate · Whey isolate, digestive enzymes · NSF Certified for Sport | $3.50 | Grass-fed isolate; costs the most here |
The proof for our pick
Here is the Informed Choice listing behind the pick, as we saw it.
The Informed Choice listing
Questions people ask
What does unflavored whey taste like?
Mild and a little milky. It has no sweetener, so it takes on the taste of what you mix it into. Stir it into coffee, oats, yogurt or a smoothie.
Is Naked Whey really just whey?
Yes. Its Amazon listing says it has one ingredient: grass-fed whey protein. It has no sweetener, flavor, color or gum. A scoop has 25 g of protein, 3 g of carbs and 120 calories.
How we picked
We looked for unflavored whey powders sold on Amazon. We searched 4 testing lists for each of the 3 products here. We ranked on three things, in this order: what else is in the scoop, a testing list for the tub, and the cost of 25 g of protein. Want fewer calories? See the best low-calorie protein powder. Want isolate in any flavor? See the best whey isolate. Or see the best protein powder overall and the protein guide.
Sources
- Amazon listings for Naked Whey, BulkSupplements Whey Isolate and Momentous Whey Isolate (unflavored), read October 31, 2026.
- Informed Choice certified products list (Naked Whey), read October 31, 2026.
- NSF Certified for Sport listings, read October 31, 2026: BulkSupplements Whey Protein Isolate, unflavored (1797161); Momentous Essential Grass Fed-Whey Protein, unflavored (1518123).
- U.S. Dairy Export Council spec sheets: Whey Protein Isolate and Whey Protein Concentrate 80% (typical lactose).