I started with the lowest percentage 0.015 - through one of those online prescribers. I tried once a week then upped to twice. Then every other night. I did this over a couple of months. I was up to every night so I increased the percentage to 0.025 which was not a good idea as I got red and spotty cheeks/rosacea. Tried buffering cream/sandwiching. I went back down to my original low percentage but I was still getting red and spotty. I’ve given up now and my skin looks a lot better!
Anyone else? Do you try retinol/retinal instead? Thanks.