Niacinamide (vitamin B3) — what to know before you use it

What niacinamide can do

Niacinamide is the active form of vitamin B3 and has been used in dermatology for over 50 years. It is one of the most versatile ingredients available: it works equally well on oily, combination, mature and sensitive skin.

Key benefits backed by research: • Regulates sebum production — less shine, fewer comedones. • Reinforces the epidermal barrier — less irritation, less redness. • Evens out skin tone — reduces sun-induced and post-inflammatory pigmentation. • Reduces visible pore size. • Acts as an anti-inflammatory — helpful in acne and rosacea.

What concentration is effective

The sweet spot is 4–10%. The JuniKa Natur Niacinamide Booster is formulated in a concentration that works without irritating.

Why not 20% as in some “strong” cosmetics? Above 10%, niacinamide can cause flushing and the opposite effect — increased sebum production. Less is more.

Key rule: niacinamide works cumulatively. Daily use over 8–12 weeks delivers more than a “strong cure” over 2 weeks.

How to use niacinamide

Evening ritual (the best moment for niacinamide): 1. Make-up removal / cleansing. 2. Toner (optional). 3. Niacinamide booster — 2–3 drops, gentle pressing. 4. Moisturiser.

Keep mornings for vitamin C serum + SPF.

Tips: • Introduce gradually: every other evening for the first week, then daily. • Combine with hyaluron — strengthens the barrier and lifts hydration. • Avoid mixing in the same layer with pure vitamin C.

Niacinamide does its job but skin still misbehaves? Check your thyroid

If you also experience hair loss, dry skin and brain fog — these may be symptoms of hypothyroidism. The thyroid regulates skin cell turnover. Under hypothyroidism the skin becomes dry, flaky and less elastic — and niacinamide alone will not solve it.

Run a TSH home test (10 min, finger-prick blood). If TSH > 4.5 mIU/L — see an endocrinologist. Once thyroid function is restored, the skin starts responding far better to every active cosmetic ingredient.

Niacinamide in your daily skincare, thyroid check-ups with a doctor and a varied diet — the three pillars of an inside-out routine.

Related product

• TSH Thyroid Test 20.00 PLN

Frequently asked questions

Is niacinamide safe for sensitive skin?

Yes. Niacinamide is one of the best-tolerated active ingredients in cosmetic science. Concentrations of 4–10% are safe for sensitive, atopic and acne-prone skin.

How long until I see results?

Initial effects (mattified skin, smaller-looking pores) — after 2–4 weeks. Even tone and pigmentation reduction — after 8–12 weeks of daily use.

Can I combine niacinamide with vitamin C?

Older studies suggested combining them lowers efficacy, but newer work does not confirm it. To be safe, separate them: vitamin C in the morning, niacinamide in the evening.