hello. tret is a pretty strong ingredient. This is how I introduced to my skin.
1. patch test. I did that on my upper arm. and checked the area in 24 hrs to confirm my skin didnt react to it.
2. After a succesful patch test, I started using tret in my PM routine. I cleansed, applied my hydrating toners and essences (no actives) and sealed that in with moisturizer. As a beginner, I applied tret over my moisturizer to prevent irritation. I allowed the moisturizer to dry fully before applying tret.
3. I applied vaseline or any protective balm around my mouth and eyes to protect them.
4. I used a pea sized amount (not more) and dotted it across my face avoiding the eye area. Then massaged it into my skin. *Dont apply it on the neck. skin is too thin and cant handle tret.
5. In the morning, I washed my face with a gentle cleanser, and followed with SPF.
6. For the first month, I used tret only once a week then sexond month applied it 2-3 times a week.
hope this helps love !