There is no lab test for hEDS or HSD, so these conditions are diagnosed based on medical history, physical examination, and by ruling out other conditions
Beck AT, Steer RA, Brown GK
Statutory approval status of oral glutathione supplements Glutathione based oral dietary supplements have been granted the status of Generally recognized as safe, consistent with Section 201(s) of the federal food, drug and cosmetic act of the United States Food and Drug Administration
Annu Rev Pharmacol Toxicol 37:397419 Aposhian HV, Gurzau ES, Le XC, Gurzau A, Healy SM, Lu X, Ma M, L Yip, Zakharyan RA, Maiorino RM, Dart RC, Tircus MG, Gonzalez Ramirez D, Morgan DL, Avram D, Aposhian MM (2000) Occurrence of monomethylarsonous acid in urine of humans exposed to inorganic arsenic