10.3389/fimmu.2019.02750 475 WangZ.ZhangL.QinC
The formation of amide bond can be addressed using EDC only, however, the resulting O-acylisourea intermediate exhibits less stability in aqueous conditions: this reduces its reactivity toward amine moieties (due to hydrolysis) and the reaction yield
There are no formal studies, only user reports, but there is a plausible mechanism
In fact, oral glutathione supplements are currently progressing, including s-acetyl 1-glutathione, and and liposomal glutathione, which have much better oral absorption
Taking L-Carnitine at the proper time and proper amount, according to your individual needs, can be a tactical move to your health and wellness plan