I got some tretinoin retin-a 0.1 gel from doctors yesterday and done a test patch last night with no adverse reaction, but would really like to know what do i use first?.., my night cream (Elemis pro marine collagen) or the Retin-A? ...How often do i use the Retin-A and finally can i still use my Witch Hazel toner as it contain alcohol? I would really appreciate some advice as i'm dying to use it :)
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