GLUTATHIONE
Mechanism of Action of Glutathione
Glutathione has several roles in inhibiting the pigmentation process. At the start of the cascade, it has antioxidant properties that eliminate free radicals and peroxides that initiate melanogenesis. In addition, glutathione inactivates tyrosinase in two ways: by chelating copper from the enzyme and by inhibiting glycosylation, another step that is critical for melanogenesis to progress. Glutathione is also involved in the conversion of dopaquinone to pheomelanin.
Efficacy of Glutathione
Preclinical Studies Using Glutathione
Alena et al evaluated the ability of injected glutathione to counter depigmentation induced by N-acetyl- 4-S-cysteaminylphenol (N-acetyl- 4-S-CAP) in black and yellow mice after multiple intraperitoneal injections in black and yellow mice.
Clinical Studies Using Glutathione
A randomized, double-blind, two-arm, placebo-controlled trial investigated the skin lightening effects of orally administered glutathione in 60 healthy subjects. Melanin indices decreased significantly more among glutathione-treated subjects than controls on the right side of the face (P = 0.021) and the sun-exposed left forearm (P = 0.036).
Safety of Glutathione
Glutathione was well-tolerated over 4 weeks in the study cited above, but long-term safety needs to be researched in a larger sample.
GLUTATHIONE Mechanism of Action of Glutathione Glutathione has several roles in inhibiting the pigmentation process. At the start of the cascade, it has antioxidant properties that eliminate free radicals and peroxides that initiate melanogenesis. In addition, glutathione inactivates tyrosinase in two ways: by chelating copper from the enzyme and by inhibiting glycosylation, another step that is critical for melanogenesis to progress. Glutathione is also involved in the conversion of dopaquinone to pheomelanin. Efficacy of Glutathione Preclinical Studies Using Glutathione Alena et al evaluated the ability of injected glutathione to counter depigmentation induced by N-acetyl- 4-S-cysteaminylphenol (N-acetyl- 4-S-CAP) in black and yellow mice after multiple intraperitoneal injections in black and yellow mice.Clinical Studies Using Glutathione A randomized, double-blind, two-arm, placebo-controlled trial investigated the skin lightening effects of orally administered glutathione in 60 healthy subjects. Melanin indices decreased significantly more among glutathione-treated subjects than controls on the right side of the face (P = 0.021) and the sun-exposed left forearm (P = 0.036).Safety of Glutathione Glutathione was well-tolerated over 4 weeks in the study cited above, but long-term safety needs to be researched in a larger sample.
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