How long does Retin-A take to work for anti-aging?
I'll be 45 and am looking for anti-aging with Retin-A, especially around the eye area. How long does it take for thickening to happen? I'd like to increase my collagen levels. How long does it take for that? And are there any strengths better than others? I've got a few tubes of the .05 % right now.


