Antioxidant

Niacin

A precursor form of vitamin B3 that converts to niacinamide in the skin, occasionally used in formulas for its mild vasodilating and conditioning effects.

vitamin B3 precursorconditioning

✓ Safe

Comedogenic Rating

0/5

Irritation Potential

0/5

What is it?

Niacin (nicotinic acid) is a form of vitamin B3 that, unlike niacinamide, can cause temporary flushing (vasodilation) at higher concentrations. In skincare it is less commonly used directly than niacinamide.

Occasionally included in conditioning or revitalizing formulas, sometimes for its mild flushing effect intended to give a temporary "glow."

Key Benefits

✦

Skin conditioning

Contributes a general conditioning effect in low concentrations.

◈

Vitamin B3 source

Can convert to niacinamide within the skin.

Suitable for

most skin types in low concentrations

Main Actions

✓ conditioning✓ mild vasodilation

When it may be insufficient

Niacinamide is generally the preferred, more stable, and better-tolerated B3 form for barrier and tone benefits — niacin's flushing effect can be uncomfortable for sensitive skin.

CategoryAntioxidants

Frequently Asked Questions

What does Niacin do for skin?

Occasionally included in conditioning or revitalizing formulas, sometimes for its mild flushing effect intended to give a temporary "glow."

Who should use Niacin?

Niacin is suitable for: most skin types in low concentrations.

Are there any warnings about Niacin?

Niacinamide is generally the preferred, more stable, and better-tolerated B3 form for barrier and tone benefits — niacin's flushing effect can be uncomfortable for sensitive skin.

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