How to Do a Whole-Body AHA Routine

Alpha hydroxy acids exfoliate chemically, dissolving the bonds between dead skin cells rather than scrubbing them away. On the body, this means a smoother texture, reduced body-acne breakouts, better product absorption, and — over time — an improvement in keratosis pilaris. The body tolerates higher concentrations than the face, but the application rules are different and the signs of overuse are easy to miss until the barrier is already compromised.

A whole-body AHA routine — which acid, what concentration, how to avoid over-exfoliation and irritation on large surface areas.

The right approach is lactic acid at five to twelve percent, applied as a leave-on lotion, no more than twice a week. Glycolic acid works too but penetrates faster and is more likely to cause irritation on sensitive areas. Start once a week, assess for two weeks, then add a second session if the skin is responding well.

1. Shower and fully dry the skin.. Use a gentle, fragrance-free wash. Do not use a physical scrub on the same day as AHA — combining both in one session strips the barrier. Pat the skin fully dry, including skin folds and the backs of the knees, before applying any AHA product. Wet skin dilutes the acid and reduces efficacy while sometimes increasing irritation in sensitive patches.
2. Apply AHA lotion in sections — lower legs first.. Work in sections rather than trying to cover the whole body at once. Start at the lower legs, then move to the thighs, then the torso, then the arms. Applying in sections prevents product from drying unevenly as you work. Use a palmful per section, applying in long upward strokes. Avoid the face, neck, genital area, any broken skin, and any currently irritated patches.
3. Leave on — do not rinse.. AHA lotions formulated for the body are designed to be left on. Rinsing removes the acid before it has finished working. Let the product sit and absorb on its own. Dress as normal after five minutes — most formulations are non-tacky by then. If you feel a mild tingling, that is normal in the first few uses. Burning, significant redness, or hot skin is not normal and means you should rinse immediately and assess the product concentration.
4. Moisturise and apply SPF the following day.. The next morning, apply a regular body moisturiser and SPF to any areas that will be exposed. AHAs thin the very top layer of skin, which temporarily increases UV vulnerability. A single session without SPF follow-up is unlikely to cause harm, but doing this consistently without sun protection will accelerate photoageing on the arms and legs — the opposite of the intended result.

The body tolerates more than the face. That is not an invitation to use more — it is a reason to start conservatively.