If activity exceeds 50 U/L, use a shorter reaction time or dilute the sample and repeat.
BMB Rep 51(9):474479 Ni F, Yu WM, Li Z, Graham DK, Jin L, Kang S, Rossi MR, Li S, Broxmeyer HE, Qu CK (2019) Critical role of ASCT2-mediated amino acid metabolism in promoting leukaemia development and progression
Diabetes Obes Metab 25(5):13851397 Amaro A, Sugimoto D, Wharton S (2022) Efficacy and safety of semaglutide for weight management: evidence from the STEP program
It is not approved by the FDA and is not a drug, food, dietary supplement, or cosmetic
These experiments indicated that, in addition to requiring Cys-dependent de novo biosynthesis of GSH for survival (see above), TrxR1/Gsr-null livers require de novo biosynthesis of Cys via transsulfuration, and that they cannot effectively utilize cystine as a hepatic Cys source [107]
The short version: feeling tired early on is common, and for most people it's temporary not a sign you're doing anything wrong
