gsh glutathione full form Structure of the tripeptide (GSH). Glutamic acid (Glu) is Glutathione - Wikipedia

Chatterjee SN, Agrawal S, Amitkumar

These results are consistent with the major features of hind-limb suspension-related phenotypes of skeletal muscles as an index of anti-gravity muscle atrophy 66 , thus assuring that the experimental design including the mouse age and muscle-disuse period (in vivo assay time-point) were appropriate to the conclusion that 3-days LASSS oral-administration prevents tyrosine-residue nitration of extracellular HGF (Y198) during 5-days muscle disuse

If the molecule is broken back down into its individual amino acids, you aren't getting the full benefit of the tripeptide itself

References Bahadoran Z, Mirmiran P, Hosseinpanah F, Hedayati M, Hosseinpour-Niazi S, Azizi F