https://youtube.com/watch?v=Xoypu__e6vkAs a board certified dermatologist, I get asked a lot about retinol (and tretinoin!) and whether it thins the skin....
vitamin a
https://youtube.com/watch?v=CijShsDtxakMy dermatologist told me his TOP 3 anti-aging tips that he feels are most important for everyone to do for...