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Description
The function of GSH in hepatocytes has been investigated by pharmacological inhibition or genetic ablation of the glutamate-cysteine ligase (GCL), the rate-limiting and regulatory enzyme in GSH biosynthesis

At optimal levels, it maintains healthy skin remodeling
Future Projections 1.3

While the NIH does not specify a tolerable upper intake level for vitamin B12, a study published in the JAMA Network Open found that high intakes of vitamin B12, such as from daily supplementation of 25 micrograms or higher, increased the risk of bone fracture [3] [4]