Notably, discontinuation is associated with weight regain and partial or complete reversal of improvements in cardiometabolic risk factors, including inflammatory markers, blood pressure, lipid profile, and blood glucose levels
Glutathione tackles this at a biological level by: Inhibiting tyrosinase activity to slow down melanin production Shifting melanogenesis from eumelanin (darker) to pheomelanin (lighter) Acting as an antioxidant to reduce the oxidative stress that triggers hyperpigmentation A 2025 systematic review in the International Journal of Dermatology confirms that oral glutathione at doses of 250 mg twice daily and 500 mg once daily showed a significant reduction in melanin index compared to placebo, particularly in sun-exposed areas like the face and wrists
Each compound has its own evidence base
Chiasson JL, Josse RG, Hunt JA, Palmason C, Rodger NW, Ross SA, et al
developed a one-pot two-enzyme reaction system with a novel exo-inulinase from Bacillus velezensis (BvInu) and DAEase from Ruminococcus sp