Cysteine is the limiting factor in glutathione production, and without enough of it your body can't make glutathione. Two ways to raise levels: supply glutathione directly, or boost cysteine transport into cells using its specific transporter.
And there's particular ways that your body puts the the makings of glutathione into the cell. So the middle rate limiting, meaning if I don't have this guy, I can't make glutathione amino acid as cysteine. If you ever taken like cysteine or N-acetylcysteine to support something, it smells real sulfur. It's a sulfur amino acid. If you look at glutathione, the remnant of the cysteine is there in the middle with the sulfur right on top of the molecule, depending on how they draw it. The target that most are looking at to increase spheroptosis is to target either the glutathione itself or the little transporter that helps the cysteine get into the cell.
