L-glutathione and reduced glutathione are the same compound, with "L" showing the molecule's stereochemistry
Chen, C., Xia, S., He, J., Lu, G., Xie, Z., & Han, H
doi: 10.1038/nrendo.2017.91 48 ChawlaA
High levels of NAC (n-acetylcysteine) supplementation have been shown to temporarily reduce homocysteine levels.[ref] Excessive supplementation with B6, methylfolate, or betaine may cause homocysteine levels to trend to the low side in some people, but this isnt well documented in research studies
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Nomenclature survey of the genus Amaranthus (Amaranthaceae): 12 questions about Amaranthus caudatus