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[DOI] [PubMed] [Google Scholar] 2.Aronis K.N., Mantzoros C.S

DOI 10.1196/annals.1320.001

This review provides a comprehensive overview of glycine metabolism, the structural biology and transport cycles of SLC6 glycine transporters, and the neuroanatomical framework of GlyT1 function

Chun et al., 2008

It's a relatively high amount for a supplement to have, but it shouldn't be a problem for most people since the maximum per-day allowance for adults is 400mcg.34 That said, you may want to avoid Doctor's Best Glutathione + Milk Thistle if you take another supplement that includes selenium or eat a lot of selenium-rich foods (e.g., Brazil nuts, tuna)

Future work to directly link the clock to regulation of GSH levels in the lens will be important in determining whether the clock can be used to help restore GSH levels in the lens