Glutathione being one of the contents of this cream is a naturally occurring antioxidant used for lightening and evening out the skin tone. It is commonly used in Asia for reducing the appearance of scars and stretch marks while enriching the skin. Glutathione is made of three amino acids: glutamine, glycine, and cysteine. While it can be very potent antioxidants, side effects of excessive usage include abdominal cramps, trouble breathing due to bronchial constriction, bloating and allergic reactions, such as rash.