Niacinamide
Good
Vitamin B3. Strengthens the skin barrier, evens tone and helps with oiliness and redness. Well tolerated at 2–5%; very high strengths can flush some people.
What it does
Active. Does something to the skin: exfoliating acids, retinoids, vitamins, peptides, soothing agents.
Also written as
Scans recognise it under every one of these names.
NicotinamideVitamin B3