Glutathione as an anti-oxidant which will help to improve the texture of the skin and make it healthy. By doing this it's likely improves the skin tone which makes it look fair but it is NOT really a fairness agent. The cost depends upon whether you are using a capsule or an injection. Even the capsule comes in different strengths like 250 mg, 500 mg and 1000 mg; and the cost would very accordingly. Even for the injections there are different strengths available and the cost would obviously be different depending on the strength and brand. hope this is helpful.