The logic is straightforward: you're about to create a significant demand for energy
Acetyl- L -carnitine decreases glycation of lens proteins: in vitro studies [PMID: 10375455] Laboratory literature summary: Acetyl- L -carnitine decreases glycation of lens proteins: in vitro studies
Besides contamination concerns, potential side effects include: injection site reactions, nausea, diarrhea, headache and fatigue
Furthermore, glutamine catabolism, known as glutaminolysis, provides fuel for the TCA cycle, which is essential for the induction of ferroptotic cell death (Gao et al., 2015a,b)
Would you go order insulin and cholesterol medications from some website and say, Here you go, inject it, without any blood testing, without any follow-up? he asks