[product question] The Ordinary - niacinamide + lactic acid 5%

Beauty Tips For Body Care
Hey there! My question is, do you know if I can use TO niacinamide and the lactic acid 5% at the same time? And which one should I use first? Or should I use one in the morning, and one in the night routine? And if that’s the case, which one should I use and when?
Girls Blog 2015
Submitted by zs0ffia