There is debate about the actual benefits of glutathione supplements in any form: oral, inhaled, or injected. Many scientists discount any supplemental product of glutathione sold, saying that the antioxidant cannot be absorbed into the body from these supplements. They recommend increasing your diet in foods naturally rich in glutathione. Several doctors agree that it is simply impossible to increase circulating glutathione to a clinically beneficial extent by consuming glutathione supplements. Those who are attracted to a more holistic approach to healthcare tend to disagree with those physicians, citing personal anecdotes and experiences as proof of the abundant benefits of glutathione supplements. Vitamin companies also boast the benefits of glutathione supplements. Many companies claim that their products decrease signs of aging, help to clear skin of imperfections or to whiten the skin, improve the immune system, reverse damage from smoking, reverse damage due to aging, and increase energy.