Uptake and metabolism of folate, vitamins B 6 and B 12 , choline, betaine, serine, and glycine may influence the methyl donor pool, and, ultimately, degrees of methylation modifications (Sapienza and Issa, 2016)
Hafliger and Charles, SLC7A5 ) imports BCAAs and several essential amino acids (e.g., phenylalanine, leucine, isoleucine, tryptophan, histidine, and tyrosine) with high affinity in exchange for the efflux of intracellular histidine, tyrosine, and glutamine (Nicklin et al., 2009
Proceedings of the National Academy of Sciences of the United States of America, 87 (5), 17151719
N-acetyl-cysteine (NAC) is an orally bioavailable precursor to glutathione, meaning it is used to make glutathione as an end-product
Reduced GSH which is most effective in acting as an antioxidant, makes up about 98 percent of your glutathione
doi:10.1016/j.pbi.2005.03.013