I would like to ask how to layer the products. I recently bought Azaleic Acid Suspension 10% to add to my routine, but not sure how to include it.
This is my routine:
AM - Glycolic 7% Toner
Vitamin C suspension
PM - Niacinamide and Zinc
Tretinoin (Retin A)
Please suggest what's the best way to layer them and where to add Azelaic Acid in this routine.
I'm 40 years old, with dare I say very good skin. Partly genetics, partly because I use skincare regularly and I don't use makeup (I'm not sure if this helps).