Best Lactose-Free Protein Powder (2026)
The best lactose-free protein powder is Naked Pea: no milk at all, $0.71 per 25 g of protein, on Informed Choice. Prefer whey? No whey is fully lactose-free, but BulkSupplements Whey Protein Isolate prints 0 g of sugars. Of the 21 whey powders that print a sugar line, the highest is 3 g.
By Erin Rose Updated November 2026 How we score
Our pick for: No lactose at all
- Lactose
- ZeroIts one ingredient is yellow pea protein
- Per 25 g of protein
- $0.71$57.99 for 5 lb, 76 servings
- Protein
- 27 g a servingPlant protein
- Testing list
- Informed ChoiceTests for banned drugs, not lactose
- Sugars
- 2 g a servingNot lactose: there is no milk in it
- Flavor
- UnflavoredNo sweetener or gum
Why we pick it Only a powder with no milk is truly free of lactose. This is the cheapest of the 2 here on a testing list, and it is also what to buy with a milk allergy. Check the allergen line for shared equipment, and ask your doctor first, especially for a child.
What you give up It has no flavor, so most people mix it into something. Consumer Reports found plant powders carry more lead than dairy ones on average, and we found no lead result for this one. If you would rather have whey, see below.
Which lactose-free protein is right for you?
Naked Pea has no lactose at all. If you want whey, flavor or a bottle, one of these may fit you better.
Still want whey: BulkSupplements Whey Protein Isolate
Its label prints 0 g of sugars and lists only whey isolate and sunflower lecithin. It is unflavored and on NSF Certified for Sport. Labels may round anything under 0.5 g down to 0, so a serving holds under 0.5 g of lactose, not none. It is still milk, so skip it with a milk allergy. 3 isolates on a testing list print 0 g, and this one costs the least. It costs 144% more per 25 g than Naked Pea.
BulkSupplements Whey Protein Isolate
$1.73 per 25 g · 25 g of protein a serving
Flavored, no milk: Vega Performance Protein
It has no milk ingredient and 1 g of sugars, and it is on NSF Certified for Sport and Informed Choice and NSF/ANSI 173. It is sweetened with stevia and uses xanthan gum. It costs 163% more per 25 g than Naked Pea. More in the best plant-based protein powder.
Vega Performance Protein
$1.87 per 25 g · 30 g of protein a serving
Flavored whey, 0 g of sugars: Isopure Low Carb
Its label prints 0 g of sugars in Dutch Chocolate, it is on Informed Choice, and it costs 192% more per 25 g than Naked Pea. It uses sucralose. Isopure Zero Carb Whey Isolate also prints 0 g and costs $2.04, but we found no testing listing for the tub we link.
Isopure Low Carb
$2.07 per 25 g · 25 g of protein a serving
A printed lactose number: Naked Whey Isolate
Of the brands we could read, only Naked prints a lactose number for its isolate: “only 0.1g of lactose per serving.” That is the brand’s claim, and the label shows 0 g of sugars. We found no testing listing for it, and it costs 266% more per 25 g than Naked Pea.
Naked Whey Isolate
$2.60 per 25 g · 30 g of protein a serving
A bottled shake: fairlife Core Power 26g
fairlife’s site calls its milk lactose-free, and this label lists lactase, the enzyme that splits milk sugar into two simpler sugars. So its 5 g of sugars says little about lactose. It is still milk. It costs $3.36 per 25 g of protein, and we found no testing listing for it. More in the best protein shakes.
fairlife Core Power 26g
$3.36 per 25 g · 26 g of protein a bottle
How much lactose is in whey protein powder?
Less than most people expect. Few labels state lactose, but lactose is one of the sugars counted in Total Sugars, so that line is an upper limit for one serving. 16 of the 21 whey powders that print it show 1 g or less, and the highest shows 3 g. Most people with lactose intolerance can handle 12 to 15 g at a time (Shaukat 2010). Labels round, so a 0 g line can hide up to 0.49 g and a 3 g line can be up to 3.49 g. Some of that sugar may not be lactose at all. This is a label read, not a lab test, and servings add up through the day. Ghost is the only whey here that lists lactase.
We found a lactose statement for 10 of the 22 whey powders, and only Naked prints a number.
All 25 powders by sugar line
Plant powders first: they have no milk, so sugar there is not lactose. Then whey, lowest sugar line first, then cheapest. Each label links to the page we read it from. A powder with no listing is not a failed one: we found no listing for the tub we link.
| Powder | Kind | Sugars | What the brand says about lactose | Testing list | Cost per 25 g of protein | Buy |
|---|---|---|---|---|---|---|
| Plant | 2 g | No milk ingredient on the label | Informed Choice | $0.71 | See on Amazon | |
 Orgain Organic Protein Plant-BasedVanilla Bean · Label | Plant | Under 1 g | No milk ingredient on the label | Not on a testing list | $1.76 | See on Amazon |
| Vega Performance ProteinVanilla · Label | Plant | 1 g | No milk ingredient on the label | NSF Certified for Sport, Informed Choice, NSF/ANSI 173 | $1.87 | See on Amazon |
| BulkSupplements Whey Protein IsolateUnflavored · Label | Isolate | 0 g | We found no statement | NSF Certified for Sport | $1.73 | See on Amazon |
 Isopure Zero Carb Whey IsolateCreamy Vanilla · Label | Isolate | 0 g | We found no statement | Not on a testing list | $2.04 | See on Amazon |
| Isopure Low CarbDutch Chocolate · Label | Isolate | 0 g | We found no statement | Informed Choice | $2.07 | See on Amazon |
 NOW Sports Whey IsolateCreamy Vanilla · Label | Isolate | 0 g | We found no statement | Informed Sport | $2.19 | See on Amazon |
| Naked Whey IsolateVanilla · Label | Isolate | 0 g | “only 0.1g of lactose per serving” | Not on a testing list | $2.60 | See on Amazon |
 Legion Whey+French Vanilla · Label | Isolate | Under 1 g | We found no statement | NSF/ANSI 173 | $2.25 | See on Amazon |
| Isolate | Under 1 g | “minimal lactose” | NSF Certified for Sport | $2.60 | See on Amazon | |
 Momentous Whey IsolateUnflavored · Label | Isolate | Under 1 g | “not guaranteed to be completely lactose-free” | NSF Certified for Sport | $3.50 | See on Amazon |
 Optimum Nutrition Gold StandardDouble Rich Chocolate · Label | Blend | 1 g | We found no statement | Informed Choice | $1.49 | See on Amazon |
 Cellucor C4 WheyVanilla Bean · Label | Blend | 1 g | We found no statement | Not on a testing list | $1.66 | See on Amazon |
 Myprotein Impact Whey IsolateVanilla Ice Cream · Label | Isolate | 1 g | “a purifying process that kicks out lactose” | Informed Choice | $1.69 | See on Amazon |
 Transparent Labs Whey IsolateFrench Vanilla · Label | Isolate | 1 g | “remove virtually all of the lactose” | NSF Certified for Sport, Informed Choice | $1.93 | See on Amazon |
 Ascent 100% Whey (2 lb)Vanilla Bean · Label | Blend | 1 g | We found no statement | Informed Sport | $2.07 | See on Amazon |
 Kaged Whey IsolateChocolate · Label | Isolate | 1 g | “reduce unwanted fat, cholesterol, and lactose” | Informed Sport | $2.07 | See on Amazon |
 Dymatize ISO100Gourmet Vanilla · Label | Hydrolyzed isolate | 1 g | “filtered to remove excess lactose” | Informed Choice | $2.12 | See on Amazon |
 Klean IsolateNatural Vanilla · Label | Isolate | 1 g | We found no statement | NSF Certified for Sport, NSF/ANSI 173 | $4.03 | See on Amazon |
 Nutricost Whey Protein IsolateVanilla · Label | Isolate | 2 g | We found no statement | Not on a testing list | $1.77 | See on Amazon |
 Naked WheyUnflavored · Label | Concentrate | 2 g | “ideal for those without a lactose sensitivity” | Informed Choice | $1.84 | See on Amazon |
 GHOST Whey ProteinCereal Milk · Label | Blend | 2 g | We found no statement | Not on a testing list | $2.12 | See on Amazon |
 Dymatize Elite WheyCookies & Cream · Label | Blend | 2 g | We found no statement | Informed Choice | $2.72 | See on Amazon |
 Thorne Whey Protein IsolateVanilla Flavored · Label | Isolate | 3 g | “contains very low lactose” | NSF Certified for Sport, NSF/ANSI 173 | $2.58 | See on Amazon |
 Optimum Nutrition Gold Standard IsolateChocolate Bliss · Label | Hydrolyzed isolate | No sugar line on the label | “remove most of the fat and lactose” | Informed Choice | $2.05 | See on Amazon |
Questions people ask
How much lactose can I have if I am lactose intolerant?
Most people can handle 12 to 15 g at a time, about a cup of milk, according to a review of 36 randomized studies (Shaukat 2010). Most of the 36 studies tested milk or lactose doses, not powders, and most enrolled people with lactose malabsorption. Some people react to less, and several servings a day add up. Start with a small serving and see how you feel.
Do I need a whey isolate, or is regular whey fine?
Many people may be fine on either. Naked Whey, a concentrate, prints 2 g of sugars, still far under 12 g. But Naked itself says it is “ideal for those without a lactose sensitivity,” so an isolate is the cautious choice. In the milk studies, the same review found too little evidence that going down to 0 to 2 g eases symptoms further.
Is whey isolate lactose-free?
Not fully. Isolates still hold a little lactose. Momentous says its own is “not guaranteed to be completely lactose-free.” Only the plant powders here list no milk ingredient.
Is lactose-free the same as dairy-free?
No. Lactose-free means little or no milk sugar. Dairy-free means no milk at all. Whey is milk protein, so if you have a milk allergy, skip every whey here, including isolates. Check the allergen line on any powder for shared equipment, and talk to your doctor first, especially for a child.
What if a low-sugar powder still upsets my stomach?
Lactose may not be the cause. Check the rest of the label: some powders add sweeteners or gums, and those bother some people. Try an unflavored powder or a plant powder, and see a doctor if it keeps happening.
How we picked
We read the Nutrition Facts for all 22 whey powders we price and 3 plant powders, for the flavor and tub we link. 21 of the 22 whey labels print a sugar line. Where a label says “less than 1 g,” we treat it as under 1 g. Only a powder with no milk is truly lactose-free, so our pick is the cheapest of those on a testing list. Our whey row is the isolate on a testing list with the lowest sugar line, then the lowest cost. Testing lists look for banned drugs; they say nothing about lactose. For the wider picture, see the best whey protein powder.
Sources
- Shaukat A, et al. “Systematic review: effective management strategies for lactose intolerance.” Ann Intern Med. 2010. PubMed 20404262
- Nutrition labels for the flavor and tub we link, linked in the table, read November 6, 2026.
- Consumer Reports, plant versus dairy protein powders and lead, October 14, 2025.