Can You Mix Adapalene and Glycolic Acid?

Why

Adapalene is a third-generation retinoid available over the counter for acne. It normalises how skin cells shed inside the pore, which prevents the clogs that become spots, and it takes several weeks of consistent use to work, often with an initial purge and dryness. Glycolic acid is an AHA that exfoliates the surface. Both are effective for congestion and texture, but they act on renewal from different directions, and combining them multiplies the irritation each causes on its own: redness, flaking, tightness and stinging. Unlike older retinoids, adapalene is relatively pH stable and photostable, so the classic worry about an acid deactivating a retinoid is less of an issue here; the real limiting factor is cumulative irritation and a compromised barrier. Glycolic also raises UV sensitivity, adding to adapalene's own sun caution. Because adapalene needs consistency to work and irritation tempts people to quit, the priority is protecting tolerance, which usually means not stacking a strong acid on top.

How to combine them

Give adapalene priority and keep glycolic light. First, use adapalene alone every night (or every other night if drying) for at least eight to twelve weeks until your skin is fully adjusted. Only then consider adding glycolic, and use it on separate nights rather than layered on top of adapalene, for example glycolic on one or two nights when you skip the retinoid. Apply to dry skin, always follow with a barrier moisturiser, and use broad-spectrum SPF 30+ every morning, since both increase sun sensitivity. Adapalene is sold over the counter for acne but is not for use in pregnancy; if your acne is severe or scarring, a dermatologist can advise on stronger or combined prescription options. Do not chase speed by layering the two, as irritation sets progress back.