Glutathione
Glutathione — a naturally occurring tripeptide antioxidant made of three amino acids that helps the body manage oxidative stress, and in skincare it is used for its antioxidant and brightening-associated properties. In topical products it is included to help defend against free radicals and support a more radiant-looking complexion.
Key points
- It is one of the body's key endogenous antioxidants and is often called a master antioxidant for its role in cellular defense.
- In topical skincare it is used to help protect against oxidative stress and support the look of an even, luminous tone.
- Its stability and absorption in topical form can be limited, so formulation quality matters for effectiveness.
- Claims about oral or injectable glutathione for skin lightening are not consistently supported and fall outside cosmetic use.
Frequently asked
Does topical glutathione lighten skin?
Topical glutathione is used to support a brighter, more even appearance through antioxidant activity, but evidence for dramatic skin lightening is limited and inconsistent.
Can glutathione be used with vitamin C?
Yes, they are complementary antioxidants and are often formulated together to support environmental defense and radiance.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
