Glutathione is sold in India as tablets, creams, soaps and intravenous drips, nearly always with the promise of lighter skin. It is an antioxidant that every cell in the body already makes. This post sets out what is known about it as a skin product. For the tablets and creams that is not much, and for the injectable form the record includes documented harm.
What it is
Glutathione is a small molecule built from three amino acids. It protects cells from oxidative damage and helps the liver process drugs and toxins. Its medical uses have nothing to do with skin tone.
Why it became a skin product
In laboratory studies glutathione interferes with tyrosinase, the enzyme that starts melanin production, and tilts production away from the darker form of melanin towards the lighter one. How melanin production works describes that pathway.
A mechanism in a dish is a reason to run trials. It is not a result in people, and the trials are where the story weakens.
What the trials found
Tablets. A handful of small, short trials exist. Some measured slight lightening at some body sites with an instrument, and others found no clear change. The studies involved few people and ran for weeks. Glutathione is also poorly absorbed from the gut, and nobody has studied the safety of taking it for years.
Creams. A few small trials reported modest measured changes. The evidence is too limited to say more.
Injections and drips. No good trial supports intravenous glutathione for skin lightening. The little controlled evidence that exists reported an effect that did not last and a high rate of side effects.
The reported harms
With tablets, the reported effects are mostly digestive: bloating, cramps and loose stools. Allergic reactions occur.
With injections the list is more serious. Published reports and regulator advisories describe severe allergic reactions including anaphylaxis, serious skin reactions such as Stevens-Johnson syndrome, and abnormal kidney, liver and thyroid function. There is also the risk that comes with any drip given outside a hospital: infection from poor technique, and counterfeit or contaminated vials.
One further point is rarely mentioned. The lighter form of melanin protects less well against ultraviolet light, so even where the product works as advertised, the skin ends up less defended against the sun.
What regulators say
The US Food and Drug Administration has warned consumers about injectable skin lightening products and has approved none for that purpose. The Food and Drug Administration of the Philippines has issued public advisories against intravenous glutathione for skin lightening, citing the kidney, liver and skin reactions above.
In India, injectable glutathione has approved medical uses, and skin lightening is not one of them. A clinic or salon offering it for that purpose is using it outside its approval.
If you are considering it
Tablets are the lower-risk form, and the realistic outcome is a small effect or none. Anyone taking other medicines should ask their doctor first.
A drip at a salon or an aesthetic clinic is the form to refuse. The risks are real and the benefit has not been shown.
The wider point
Lightening the overall tone of skin is not something a cosmetic can deliver, and the products that do it fast are drugs with drug side effects. What facial bleach does and how to tell whether a cream contains a steroid cover the two other common routes.
If the concern is marks or patches against your own tone, that is a different and more answerable problem. How to fade dark spots starts with identifying the kind of mark.
Where Cham stands
Cham sells no glutathione in any form, and nothing in the range is made to change skin tone. What skin brightening means sets out the line: the range evens the look of marks and dullness with niacinamide, alpha arbutin and vitamin C, and leaves the tone underneath as it is.
