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most published clinical trials have evaluated oral or topical glutathione
J Child Neurol 17:833837 Hassan WM, Al-Ayadhi L, Bjrklund G, Alabdali A, Chirumbolo S, El-Ansary A (2018) The use of multi-parametric biomarker profiles may increase the accuracy of ASD prediction
The next study was conducted in Taiwan by Lin et al., in 2024, and examined the oral supplementation of vegan collagen on human skin physiology in a double-blind, placebo-controlled trial [50]
A 50kg individual and a 90kg individual may respond optimally to the same dose because the target is receptor occupancy in the brain, not systemic concentration per kilogram