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Our proposition is that suboptimal GSH levels associated with so many chronic diseases is not due to a cysteine undersupply but an impairment in one of the multiple control mechanisms of the GCL enzyme
Bttger and Schacht 2013
Adults over 50 are more likely to develop B12 deficiency without realizing it, especially if symptoms like fatigue, memory loss, or mood changes are attributed to aging itself
If symptoms continue despite taking B12, or if symptoms are new, severe, or progressive, a doctor should review the situation
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