The scientific community recognises that peptides, by their nature, are susceptible to degradation by heat, moisture, and light
General peptide storage and handling guidance
Glutathione exists in two forms: the reduced form (GSH), which is the active antioxidant, and the oxidized form (GSSG)
However, in certain cases, OGD may be inconclusive and therefore in those with ongoing melena, further investigations are required: CT angiogram can be useful in assessing for any active bleeding, especially in those with suspected ongoing bleeding and / or haemodynamic compromise Colonoscopy should be performed, especially those who are haemodynamically stable, to ensure that the cause of the melena is not actually proximal colonic in origin (e.g
Still, a mild deficiency will almost always get worse over time