what skincare ingredients should i not mix with retinol?

From my personal skincare experience, using retinol is a game-changer but requires a bit of caution when layering products. Retinol works by speeding up cell turnover, but combining it with exfoliating acids like AHAs (such as glycolic acid) and BHAs (like salicylic acid) can cause excessive irritation, redness, and peeling. I learned this the hard way when I first added a salicylic acid treatment alongside retinol; my skin became extremely sensitive and flaky. Additionally, benzoyl peroxide, an acne-fighting ingredient, can deactivate retinol and increase dryness, so it’s best to avoid using them together. Although some sources mention vitamin C is not recommended with retinol due to pH differences and potential irritation, some people tolerate using vitamin C in the morning and retinol at night well. On the other hand, I found that hydrating ingredients like hyaluronic acid and ceramides work beautifully with retinol, helping to alleviate dryness and maintain skin barrier health. Incorporating a moisturizer rich in ceramides after retinol application helped soothe my skin significantly. It's also important to always apply sunscreen daily when using retinol, as it increases skin's sensitivity to sunlight. A product containing encapsulated retinol can sometimes offer gentler action for sensitive skin. When starting retinol, I advise introducing it gradually and avoiding layering multiple active ingredients until your skin builds tolerance. If you’re using products like the Garnier Green Labs Brightening Serum with vitamin C or a serum containing exfoliants, be mindful of timing and layering with retinol to avoid irritation and maximize benefits.