Ingredient pairs

Which skincare ingredients can you use together?

Only a handful of pairings are worth separating. Most irritation comes from stacking too many strong actives at once. Pick a pair below for the verdict, the reason, and a routine that uses both.

A grid comparing six actives. Don't layer tretinoin with benzoyl peroxide, or retinoids with AHA or BHA acids. Split vitamin C and retinoids, vitamin C and benzoyl peroxide, vitamin C and acids, and benzoyl peroxide and acids between morning and night. Niacinamide and hyaluronic acid are fine with everything.Which actives can share a routine?RetinoidBPOAcidsVit CNiacin.Benzoyl peroxideAHA / BHAVitamin CNiacinamideHyaluronic acidDon't layerSplit AM / PMFine together
Every common pairing at a glance. Red means don't layer, amber means split between morning and night, green means fine together.Sources: Martin et al., Br J Dermatol 1998; AAD acne tips

Don’t layer

Use with caution

Split AM / PM

Fine together

Want to check your exact routine? Use the free ingredient conflict checker, or read the full guide to skincare ingredients not to mix.