Niacinamide

What is it?

A form of vitamin B3 with barrier-strengthening benefits.

What skin condition does it help with?

Redness, acne, uneven tone, enlarged pores, oil regulation.

Which skin types need it?

All skin types; especially oily, combination, sensitive, or acne prone.

Do not combine with:

Very low-pH acids

What are the common risks?

Flushing, irritation

What are the safe-use guidelines?

Use ≤5% for sensitive skin; can layer with most ingredients