The specificity of the assay was 100% GLP-1 [736], GLP-1 [936], and GLP-1 [737]
It is l-glutathione
Musio A, Selicorni A, Focarelli ML, Gervasini C, Milani D, Russo S, et al
The publication concluded that Supplementation with a combination of vitamin D and L-cysteine or glutathione precursor, rather than supplementation with vitamin D alone, is beneficial and helps achieve more successful vitamin D supplementation. Study Confirms Significant Effect of Vitamin D Level on Levels of Glutathione, GSSG, and Cysteine A study by Alvarez et al
Hence, because some of the cardiovascular benefits of SGLT2is are related to their hemodynamic effects, while those of GLP-1RAs are mainly related to their anti-atherogenic/anti-inflammatory actions, the two classes of medications may produce an additive cardiovascular benefit [11]