Do niacinamide works?
As you can read by my headline I asked chat gpt , geminie and perplexity about my darkness around my neck they all concluded at the end to you use niacinamide. I have started using it, i think its working but i also think it might be a placebo effect so i want to know from someone who have used it.
u/Infamous-Fennel-4645 — 5 days ago