Glutathione acts as an important antioxidant in your body. That means it helps combat free radicals. These are molecules that can damage your body's cells. People take glutathione for its antioxidant power and as a detoxification agent. Glutathione for skin whitening procedure depends on the metabolic response of individuals. Some might see the result in as early as two weeks, while some may take longer. It can help improve ur skin tone and texture but u have to take the injections regularly and maintain with oral medications also. Consult a Dermatologist for the same.