Dr. Sensitive Collagen and Vit C Serum

The claim that you can't mix niacinamide and vitamin c is actually a myth! The studies that showed they shouldn't be mixed were done in extreme conditions that aren't applicable to how it's being used in skincare. Since this is a vitamin c product, you can use it day or night. I like it in the daytime because it's a good antioxidant, and there are claims that it boosts the efficacy of sunscreen. However, do note that it is advised not to use vitamin c with other actives like chemical exfoliants and retinol because it might cause irritation. I personally haven't tried this product yet, but I'm really curious about it since the ingredients seem decent and it's very affordable ☺️

I haven’t used it but you can use in the mornings