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The intracellular concentration of gamma-glutamylcysteine (GGC) is extremely low (~ 5 uM) when GS is present, thus GCL is considered the rate-limiting enzyme [6]
Hansen, C
The Institute of Medicine reports that no adverse effects have been associated with excess vitamin B12 intake from food and supplements in healthy individuals. However, if youre not deficient in vitamin B12 to begin with or you dont address the underlying reasons you might be deficient, i.e
Keep a record of injection dates and sites
Methylcobalamin is a form of vitamin B12
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