glutathione+and+autism Intracellular and extracellular glutathione redox imbalance in autism Glutathione and Autism: Evidence-Based Overview
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Grodstein F, Stampfer MJ, Manson JE, Colditz GA, Willett WC, et al

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However, an elevation of B12 in ones serum can be tied to the MTHFR gene variation , as those with the MTHFR gene variation may be unable to properly use non-methylated B12

doi: 10.1046/j.1365-2230.2002.01085.x
