I recommend the most highly recognized compound RiboCeine (D-Ribose L-Cysteine) for cellular Glutathione production
Mechanism in research literature NNMT (nicotinamide N-methyltransferase) catalyses the methylation of nicotinamide using S-adenosylmethionine (SAM) as the methyl donor, producing 1-methylnicotinamide (1-MNA) and S-adenosylhomocysteine
Once inside the cell, sulfate is activated by ATP sulfurylase to form adenosine 5'-phosphosulfate (APS), which is then reduced to sulfite by APS reductase
Glutathione is widely found in animals and plants, and the contents of the bread yeast, wheat germ and animal liver are very high,100~100 mg/1000 g;Content is also rich in human and animal blood, such as human blood contains 26~34 mg/100 g, chicken blood contains 58-73 mg/73 g, pig blood contains 10~15 mg/100 g, the dog blood contains 14~22 mg/100 g.Many vegetables, potato and corn also contains GSH (see table 1)