Short monologue (YouTube short) by dermatologist Shereene Idriss explaining that when using retinoids the percentage matters; warns against increasing concentrations without guidance, credits The Ordinary for ingredient education but criticizes consumer self-experimentation that damaged skin barriers, and advises prioritizing consistency at lower percentages to avoid inflammation.
Chapters
But there's more. It doesn't boil down just to the type. You also need to understand the percent. This is where understanding the percentage of the retinoid that you're using is important. And I am not somebody who likes single ingredient stories. God bless the ordinary for teaching everybody about ingredients and skin care. God bless them. They made everyone smarter but as a dermatologist who practices every single day they also effed up your skin barrier because everybody thought they were their own cosmetic chemist or dermatologist at home or esthetician at home playing with their face trying to up percentages of ingredients that did not need to be upped. However certain ingredients you do need to know the percentage because you need to figure out what level and what type you can tolerate before moving on to the next. Because guess what, an inflamed skin barrier is the worst thing that you could do for your face and consistency over intensity. Consistency at a low percent over intensity is the name of the game.