You likely also need to follow a strict SIBO/SCD diet with no grains, and no FODMAP foods
In contrast, taking glutathione by mouth (as pills or liquids) is far less efficient because the compound is largely broken down in the gut before it ever reaches the cells
Why Tablets Can Be Effective Despite Lower Bioavailability: While IV glutathione delivers a higher concentration directly into the bloodstream, oral tablets can still provide benefits, even with lower bioavailability
10.1126/scitranslmed.abl3981 175 TackeF.WeiskirchenR
Panel B of Figure 5 shows that the fluctuations in methionine input cause very large fluctuations in SAM but only modest fluctuations in intracellular methionine concentration, as suggested by the early methionine loading experiments of Finkelstein and co-workers [53, 54]
Because of its dietary sources, vegetarians and vegans are at a higher risk of developing a deficiency