Niacinamide, explained — percentages, benefits and how to use it

Niacinamide (vitamin B3) is one of the most researched, best-tolerated actives in modern skincare — and one of the quiet workhorses of Korean routines. It calms redness, regulates oil, strengthens the barrier and gently fades post-blemish marks, all without the sting of stronger actives. If you only add one 'treatment' ingredient to your routine, this is the safest place to start.

What niacinamide actually does

• Strengthens the skin barrier by boosting ceramide production — skin holds water better and reacts less to weather, actives and stress.
• Regulates sebum, so oily and combination skin looks less shiny by mid-afternoon.
• Reduces redness and calms inflammation — helpful for rosacea-prone and post-acne skin.
• Fades post-inflammatory hyperpigmentation (the brown or pink marks left after spots) by interrupting melanin transfer.
• Supports fine-line and pore appearance over time by improving overall skin quality.

Percentages — how much do you actually need?

• 2–5%: gentle, everyday strength. Ideal for sensitive skin, first-time users, and layering under SPF or with other actives.
• 5–10%: the sweet spot for oil control, pigmentation and barrier support. Most Korean serums and essences sit here.
• 10%+: powerful but can flush, tingle or worsen redness in sensitive skin. Not more effective for most people — just harsher.

Who it's for

• Oily and combination skin — for shine control and refined pores.
• Acne-prone skin — for redness and post-blemish marks (safe alongside BHA and retinoids).
• Sensitive and rosacea-prone skin — for calming and barrier support.
• Mature skin — as a gentle, everyday complement to retinal and peptides.
• Pregnancy and breastfeeding — widely considered safe (always check with your doctor).

How to use it

1. Cleanse and pat skin damp.
2. Apply a few drops of a niacinamide serum or essence to the whole face — morning, evening, or both.
3. Follow with moisturiser. In the morning, always finish with SPF 50.
4. Layers cleanly under and over most actives (see pairings below).

What to expect

• Within 2 weeks: less midday shine, calmer redness.
• Within 4–6 weeks: post-blemish marks visibly softer, pores look tighter.
• Within 8–12 weeks: overall tone more even, skin feels more resilient.

Pairings and cautions

• Pairs beautifully with hyaluronic acid, peptides, ceramides, retinal, PDRN and SPF.
• The old 'don't mix with vitamin C' myth is largely debunked — modern formulas layer fine, and many combine both.
• If you feel a flush or tingle, drop to a lower percentage or use every second day until skin adjusts.
• Avoid piling multiple niacinamide products at once — one 5–10% serum is plenty.

Browse gentle niacinamide essences, serums and creams in the Litsy shop — perfect for calming, brightening and steadily strengthening your barrier.