Glycolic acid is an alpha hydroxyl acid (AHA) derived from sugarcane, and is often combined with benzoyl peroxide to create acne treatments. Glycolic acid is able to deeply penetrate the skin due to the fact that it has small molecules, making it also one of the best treatments for wrinkles, fine lines, oiliness, dullness and blackheads.
Consistent use of glycolic acid in lower doses will also get you good results, just as much as heavy concentration peels, except that this is safer to use with a lower chance of causing skin irritation.
Peels and creams made using glycolic acid exfoliate the skin, effectively removes the dead cells that both sit and accumulate on the surface of your skin, and unclog pores.
Exfoliation is important since oily skin and acne prone skin exfoliate naturally much more slowly than other skin types. This makes them prone to big, clogged pores, which can result in nodular acne or whiteheads and blackheads.
Glycolic exfoliation also stimulates the healthy, live lower layers of your skin, causing them to generate new live, healthy skin and even produce collagen, all making your skin firmer. Lastly, glycolic exfoliation is instrumental in the prevention and treatment of acne breakouts and minimizing the appearance of enlarged pores.
Glycolic acid also keeps the skin moisturized. This together with the removal of dry, flaky skin cells helps to keep the skin healthy and balanced since the production of oil and sebum on the skin is regulated.
Since most glycolic acid treatments are meant to be used on mature skin, they mostly have moisturizers and comedogenic oils that aim at moisturizing non acne affected skin.
When used as a standalone product, you can use this treatment plan on a daily basis but if your skin is already clear and you are just using the product to fade away hyper pigmentation on the skin, you can use this product once or twice a week.
Bless and be blessed!