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Optimal Glutathione contains 100 mg of glutathione as S-Acetyl glutathione per acid-resistant capsule

From a biochemical perspective, the peptides reported resistance to enzymatic degradation may be attributed to the presence of a disulfide bridge between cysteine residues, along with an N-terminal tyrosine substitution, which potentially supports its structural resilience under experimental conditions, such as in vitro digestion models

doi: 10.1172/JCI124049 76 SainiKKChaturvediPSinhaASinghMPKhanMAVermaAet al

The "PDA" counterion argument that arginate salt formulation constitutes a distinct compound outside the Category 2 ruling has not been validated by any FDA guidance as of this writing