Is There a Certain Age when Starting Retin A Would No Longer Be Helpful?

As long as your skin is alive and metabolically active, Retin-A can have beneficial effects on skin metabolism, exfoliation, softness, line or wrinkle reduction, and stimulation of collagen and elastic fiber growth. At advanced age, we all have cumulative sun damage, loss of collagen and elasticity, and reduced vascularity in our skin (especially sun-exposed skin), and Retin-A helps all of these things!

Retin-A will have beneficial effects on your skin regardless of your age.  It will result in smoother skin, reduction in fine lines, and help to build collagen.  

A maitainance program of Retin A is always helpfull.

Once you reach the desired results then you can go on a maitainance program of applying Retin A every other day, or every twice a week..