Ingredient index

Niacinamide

Supports barrier lipid synthesis and moderates sebum. One of the few actives that plays well with everything.

Use it: AM or PM, daily
Evidence: moderate

Sources

Niacinamide - Dermatologic Surgerysystematic review

Niacinamide: what it does, when to use it, what not to pair it with - BeautyTalks