Thanks! I hope you can answer some more questions because i want to understand correctly before i start Why would you not recommend it? I often read to protect from both sides! 1ml in 84ml = 1,2%. Is that what you use? (Around that %). Seems low You said you reduced tretinoin to ~1 grams. This raised some questions for me: -You put 1 gram per application (thus per dat)? - why one week on and one week off? - how do you do this? Multiple bottles of stemox, one with and one without tretinoin?