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3. Exactly what to use
Look for a body product with 10% to 12% lactic acid. That strength is common in over-the-counter formulas and is usually enough for rough knees without jumping straight to harsher peeling products. If your skin is reactive, start with 5% to 8% once every other night. Fragrance-free formulas are best if you also deal with itching or eczema.
For the sealing step, plain petroleum jelly works, but a thick ceramide cream or ointment also does the job. I prefer something simple and boring here. No perfume, no essential oils, no glittery “brightening” add-ons. For both knees combined, you only need about 1 to 2 teaspoons of product total. More is not necessarily better if it increases irritation.
4. How I apply it for the best overnight results