Glutathione is an anti oxidant present in the body. There are reports of glutathione improving the skin tone all over the body. Tablets should be taken in a dose of 1g per day for 3 months. But absorption from tablets is unpredictable. Those who's body doesn't absorb it well will not have good results. Injections also can be taken on a weekly basis. Cost varies depending on which company produces it. You will need to enquire that from the Dermatologist prescbing it to you. It is generally quite expensive. Tablets cost around 5 to 6k as far as I know and injections slightly more expensive. Injections will also be needed for 3 months, weekly once. Warm regards. Dr. Rajdeep Mysore. Chirag Hospital Bangalore