“The optimum percentage is 10% for low impact and up to 20% for those wishing to have a deeper impact,” explains Dr Nyla. “Combining [or layering] glycolic acid with retinol can be ...

Dr. Nathan says, "For oily, greasy hair or to treat a flaky scalp, apply glycolic acid directly to the scalp, leave on for 10 minutes and then shampoo as usual. Use 1-2x/week." If you're someone ...

glycolic acid is relatively low-risk and thus safe for skin. Dermatologist Dr. Janklow Libby says a concentration of less than ten percent falls within the okay-to-use range, and helps to ...