Private label protein powder is whey, plant or blended protein made by a supplement or food manufacturer and sold under your brand. US makers publish minimums from 48 bottles on stock products, so you can test flavors cheaply. Three decisions shape everything after: whether to sell it as a dietary supplement or a food, how to make protein claims that hold up, and how to handle heavy metals, which buyers increasingly ask about.
I’ll compare manufacturers, then cover the label choice, protein claims, lead and Prop 65, and Amazon. Flavor first, though. Always flavor.
Protein powder manufacturers and minimums
From each company’s own site, checked in October 2026:
| Manufacturer | Location | Published minimum |
|---|---|---|
| ViaCore Nutrition | Oklahoma | As few as 48 bottles on a stock product; 1,250 on a custom formula |
| Vitalabs | Atlanta, Georgia | 72 bottles per SKU |
| Cpack Manufacturing | Orem, Utah | 1,500 units |
| NutraSeller | United States | 2,500 units for first orders, with a $10,000 minimum project investment |
My take: test two or three flavors from stock at a low-minimum maker. Flavor and mixability drive reorders in this category more than anything on the label. Then move your best seller to a custom formula.
Supplement or food? Pick one
Federal law defines a dietary supplement as a product labeled as a dietary supplement and not represented as a conventional food or as the sole item of a meal. Protein powder can be sold either way, and the choice changes the label:
| Sold as a dietary supplement | Sold as a food | |
|---|---|---|
| Panel | Supplement Facts | Nutrition Facts |
| Manufacturing | Dietary supplement cGMP (21 CFR Part 111) | Food safety rules |
| Claims | Structure/function claims with the FDA disclaimer and 30-day notice | Food claims |
| Amazon | Supplement rules, including third-party verification | Grocery rules |
Decide before you design packaging. Not after. In my view, most protein powders sold for fitness fit the supplement route, but get regulatory advice for your exact product and claims.
Protein claims: “high protein” and PDCAAS
- “High protein” or “excellent source” requires 20% or more of the Daily Value per serving; “good source” requires 10% to 19%. These rules apply to both foods and supplements.
- If you make a protein claim, the protein % Daily Value must be shown, calculated with the protein digestibility corrected amino acid score (PDCAAS). Lower-quality proteins count for less, so a big gram number on the front doesn’t guarantee a “high protein” claim.
Ask your manufacturer to calculate the corrected protein %DV before you print. Honestly, this is the most common label detail I’d double-check.
Heavy metals, lead and Prop 65
Dietary supplement cGMP rules require manufacturers to set limits on contaminants that could adulterate a batch. The FDA has published interim reference levels for lead exposure (2.2 micrograms a day for children, 8.8 for women of childbearing age), though these are reference points, not limits for protein powder. California’s Proposition 65 uses much stricter safe harbor levels, including 0.5 micrograms a day for lead’s reproductive effects, which is why many products sold in California carry warnings.
What I’d ask for: heavy metal test results (lead, cadmium, arsenic, mercury) on every batch, and a clear answer on whether your product needs a Prop 65 warning for California sales. Plant proteins deserve extra scrutiny here. Ask twice.
Third-party certification
If your buyers are athletes, consider NSF Certified for Sport (it tests for more than 280 banned substances and verifies the label) or Informed Sport (it tests every batch for banned substances before release). They cost money. They also answer the question serious buyers ask first.
Selling protein powder on Amazon
Since April 2, 2024, Amazon has required dietary supplements to be verified through a third-party testing, inspection and certification organization. Sports nutrition was in the first wave, and Amazon staff have named NSF International, Eurofins and UL among approved firms. Build that cost and timeline into your launch.
When you list, put protein per serving, protein source and flavor in the first image. For more supplement categories, see our guides to private label pre-workout and private label supplements with no minimum order. If you’d like a team to source and vet manufacturers, that’s our complete sourcing management service.
FAQ
What is the minimum order for private label protein powder?
Published minimums from US makers start at 48 bottles on stock products and 72 bottles per SKU, rising to 1,250 to 2,500 units for custom formulas.
Is protein powder a supplement or a food?
It can be either. A dietary supplement must be labeled as one and not represented as a conventional food; otherwise it’s sold as food with a Nutrition Facts panel.
When can I call my protein powder “high protein”?
When a serving provides 20% or more of the Daily Value for protein, calculated using the PDCAAS-corrected amount.
Does protein powder need a Prop 65 warning?
It can, for products sold in California, depending on lead and other listed chemicals. Ask your manufacturer for heavy metal test results.
Do I need third-party testing to sell protein powder on Amazon?
If sold as a dietary supplement, yes: Amazon requires verification through an approved testing, inspection and certification organization.
What certification do athletes look for?
NSF Certified for Sport and Informed Sport, both of which test for banned substances.
Last updated: October 5, 2026. General information, not legal advice; confirm requirements with the FDA, California OEHHA and Amazon. Sources: 21 U.S.C. 321(ff); 21 CFR 101.54; 21 CFR 101.9; 21 CFR 111.70; FDA, lead in food and foodwares; 27 CCR 25805; NSF Certified for Sport; Informed Sport; Amazon Seller Forums, supplement TIC verification; ViaCore Nutrition; Vitalabs; Cpack Manufacturing; NutraSeller.
