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Glycine is even considered a rate-limiting step (1) in the production of glutathione in the body

As with nails, hair needs keratin, which becomes limited with CKD

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Although it has been generally accepted that acquisition of a toxic property by mutant SOD1 forms rather than loss or gain of its superoxide scavenging activity is responsible for the manifestation of ALS phenotype, how exactly SOD1 mutations lead to the selective motor neuron death is not yet entirely clear
