How to Layer AHAs in Your Evening Routine

Incorporating alpha hydroxy acids into your nighttime routine requires a strict order of operations to ensure efficacy. Because these ingredients function by modifying the surface environment of the skin, they must be applied at the correct stage to be effective.

A structured sequence protects the integrity of the barrier while allowing the active ingredients to perform their intended function. Follow this protocol to establish consistency without complications.

1. Begin with a gentle cleanse. Remove all surface debris, oil, and environmental particles with a pH-balanced cleanser. Pat the skin completely dry with a clean towel. Residual moisture can increase the penetration rate of acids, which may lead to unnecessary irritation.
2. Apply the AHA treatment. Dispense a small amount of your chosen AHA liquid or serum into your palms. Press the product gently into the skin, starting from the center of the face and moving outward. Avoid the immediate eye area entirely to prevent contact with sensitive tissue.
3. Allow for complete absorption. Wait at least five full minutes before proceeding to the next layer. This interval allows the product to settle into the stratum corneum properly. If the skin feels tacky, you have likely applied too much product.
4. Follow with a humectant. Apply a simple, fragrance-free hydrating serum or essence. This step replenishes moisture after the use of the acid. Choose a formula containing glycerin or hyaluronic acid to maintain the skin’s hydration balance.
5. Seal with an occlusive moisturizer. Complete the routine with a barrier-supporting moisturizer. This creates a final seal that traps hydration and prevents transepidermal water loss overnight. Choose a cream with ceramides or plant oils.

Consistency in sequence is more important than the concentration of the product itself.