Review (5/5): This will seep to the basil layer of your skin to rejuvinate
Do not buy products that do not have a low molecular weight. A low molecular weight allows the product to seep into the lower layers of your skin. I add this to my own skin formula that I use and people will argue that I am not a 65 year old man. Apply some alpha hydroxy acid on the skin first, then apply the glycolic acid, then any other topical such as sun screen, etc. I noticed the difference in about 5 weeks. I've been using for about a year and it is a mainstay of my grooming regimen.