Key takeaways (updated 2026)
- USP, EP, and JP are major pharmacopoeial standards systems — not consumer brands.
- They describe quality/testing expectations for identity, purity, and strength.
- For supplements, transparent testing and serious manufacturing culture matter.
- See MASI Science · NMN
When people compare USP vs EP vs JP, they’re really asking: what does “quality” mean in regulated ingredient testing?
Plain-language definitions
- USP — United States Pharmacopeia
- EP — European Pharmacopoeia
- JP — Japanese Pharmacopoeia
These frameworks help labs and manufacturers verify materials. They are not a substitute for reading a brand’s actual testing practices.
What shoppers should look for
- Clear product identity and strength
- Batch testing mindset
- Realistic claims
- Traceable company standards
MASI positions Premium formulas around purity and rigorous quality expectations — start at Premium.
Quality-first formulas: NMN, Resveratrol, Spermidine, Fisetin.
Educational information only — not medical advice. Talk to your doctor or pharmacist before starting any supplement, especially if you take medicines or have a health condition.
