If you don't
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Curi can find what to use — and why.

Niacinamide, also known as vitamin B3 or nicotinamide, is a water-soluble vitamin that appears as a white powder and is odorless with a salty, bitter taste. It is found naturally in meat, fish, wheat, and small amounts in vegetables, but the cosmetic-grade version is produced exclusively synthetically. It is a multi-functional ingredient with a broad range of studied skin benefits, typically used at concentrations of 2–10% in topical formulations. Its CAS number is 98-92-0. Curi indexes 2,400 propolis-containing formulas across eight retailers — and tells you which actually use beekeeper-grade extract.