Retin-A, Derma Roller 1mm, Vitamin C, and Glycolic Peel, Appliance?

I would like to know how to use Retin – A 0.05, Derma roller 1mm, Vitamin c Serum and Glycolic peel into my weekly skin care regime. How many days would you advise in between each of these? What topical actives should you use with a derma roller? Is it ok to buffer Retin – A 0.05 with Palmer’s Cocoa butter Formula?

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