I am 22 and I am concerned about skin ageing since i spent alot of time in the sun without sun protection as a teen. That's why I want to start retin-a (for a lifetime) as a way to prevent wrinkles and kind of "undo" this damage However I keep reading it is too agressive a treatment for a young skin and that it could damage my skin by thinning it in the long run (in beauty blogs) Is it true?