Hi, Sonia. The best 2 brown spots treatment ingredients available over the counter are Arbutin and Kojic Acid. Arbutin is a natural derivative of hydroquinone derived from plants, including bearberry, blueberry, and cranberry. Some cosmetic products contain 3% concentrations, which studies show can significantly lighten the skin. Kojic Acid is an antioxidant derived from a fungus. It works by breaking down melanin in the skin and preventing its production in the skin. Kojic Acid is found in cosmeceuticals in 1% to 4% concentrations either combined with other skin-lightening agents or by itself.
Check out the "brown spots" tab on the "tips" section of your personal routine on the app for some specific products suggestion to fade your brown spots. 🙂