transdermal glutathione vs liposomal L-Glutathione Glutathione: Key Differences – CYMBIOTIKA Super Antioxidant Liposomal Glutathione -

Methionine is converted to S-adenosylmethionine (SAM) by methionine adenosyltransferase (MAT), which then creates S-adenosylhomocysteine (SAH) via TSS.SAH is converted to homocysteine (HCY), a precursor of cysteine, by S-adenosylhomocysteine hydrolase (SAHH) (99, 100)

J Exp Bot 65:527538 Belkadhi A, Hediji H, Abbes Z, Djebali W, Chabi W, (2012) Influence of salicylic acid pre-treatment on cadmium tolerance and its relationship with non-protein thiol production in flax root

You can be confident that the effects you observe are from the compound itself, not from some unknown impurity

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