I recently succumbed with a hefty discount and decided to try the Sunday Riley retinoid serum but I'm nervous as there seem to be so many do/don'ts using this kind of thing. Generally I have very good skin, (on the dry side), but not very lined etc for my age.
It says to use 2/week initially, and use an oil or moisturiser after.
How long after does it mean? do I leave it to soak in, or wait a proper long time?
Any other tips/advice welcome please. Thank you