Niacinamide + SPF: A Power Pairing for Spring
Why this combo supports your barrier under UV stress.
Niacinamide (vitamin B3) is a well-studied skincare active shown to support the skin barrier and help fade hyperpigmentation, making it a complement to — not a substitute for — daily sunscreen.
Dermatologists frame niacinamide as a supporting player to SPF: it helps reinforce the barrier and calm UV-stressed skin, but only sunscreen actually filters the UV that causes the damage in the first place.
Questions we get a lot
How do I layer niacinamide with sunscreen?
Apply niacinamide on clean skin (in a serum or moisturizer), let it absorb for a minute or two, then apply broad-spectrum sunscreen as the final morning step. Niacinamide supports the barrier and helps with oil and pigmentation, but it does not filter UV — so it complements sunscreen rather than replacing it.
Does niacinamide replace sunscreen?
No. Niacinamide is a supportive active that can strengthen the skin barrier, control oil and help fade UV-induced dark spots, but it provides no meaningful UV protection on its own. It works best paired with a daily broad-spectrum sunscreen, which is what actually blocks the rays that cause the damage.
r/AsianBeauty: 'Should I layer niacinamide under or over my sunscreen in the morning?'