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Capron A, Capron M, Dombrowicz D and Riveau G
Glutathione is a tripeptide made from three amino acids (glutamate, cysteine, and glycine), and cysteine is the bottleneck: your body typically has plenty of glutamate and glycine, but cysteine availability limits how much glutathione you can produce
The superior rate of absorption of B12 injections means that they can be administered every 3-6 months
Notably, rodents have only the first four GPx isoenzymes (GPx1-GPx4) as the selenoenzymes and the remaining four (GPx4-GPx8) as the cysteine-containing enzymes [1, 8, 9]
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