You need both
Studies have also shown that L-carnitine supplementation may improve exercise recovery, by alleviating muscle injury, and reducing markers of cellular damage
Monthly plans can be paused or canceled before the next billing cycle, but all prescription medication sales are final
BMJ 340:c363 Farr SA, Niehoff ML, Kumar VB, Roby DA, Morley JE (2019) Inhibition of glycogen synthase kinase 3beta as a treatment for the prevention of cognitive deficits after a traumatic brain injury
Formal large-scale safety studies are still needed
But 'very weak' isn't 'zero.' At very high, supra-physiological doses not typically used in responsible research, some minor, transient elevations might be observed