What certifications should I look for in a small batch supplement powder blender?

At minimum, look for FDA-registered facilities operating under 21 CFR Part 111 GMP. Additional certifications that signal quality include NSF GMP Registration, Informed Sport, Kosher (OU or OK), Halal, and USDA Organic (for organic-labeled blends). AJ Cosmo Labs lists verified certifications on each manufacturer profile so you can filter by the credentials your customers and retail buyers require.