13 products analyzed · 13,217 reviews read · 1,260 reddit comments · 206 TikToks watched · 54 ingredients decoded.
Niacinamide: what it actually does and what it doesn't
Built from 13,217 verified buyer reviews on Sephora, Ulta, Amazon; 1,260 reddit comments across r/SkincareAddiction and r/30PlusSkinCare and r/MakeupAddiction and r/HaircareScience (75% positive sentiment); 206 TikToks watched; 37 repurchase mentions tallied; and 8 editor takes from Vogue, Allure, Byrdie, The Cut, Into The Gloss. Here's the consensus — and where it's wrong.
Niacinamide is real, but it's not a one-shot fix. Here's what the evidence says.
Niacinamide is real, but it's not a one-shot fix. Here's what the evidence says.
How we built this Receipt.
Sources weighted by recency
A 2025 derm podcast outranks a 2021 review aggregator. We say so explicitly in the source list.
Reddit signal, weighted by sub
Quality of consensus differs by community. r/30PlusSkinCare carries different weight than a generalist sub.
Ingredient cross-check
Every active is cross-referenced against PubMed and INCIDecoder. We flag any percentage claim we can't verify.
Reformulation watch
We monitor INCI changes monthly. If the formula you bought last year isn't the formula on shelves now, you'll see it here.