10.3390/antiox9030260 19 FaulM.XuL.WaldM
That said, taking carnitine pre workout could improve exercise performance but long term daily supplementation seems to be required to maintain muscle carnitine levels and the associated benefits, including its muscle recovery benefits for alleviating delayed-onset muscle soreness and markers of muscle damage (4, 5)
Pre-workout is the second most popular option
Diet First Glutamine-rich foods: Bone broth, cottage cheese, spirulina
On the other hand, carnitine has been studied much less from a scientific perspective
In their lyophilised (freeze-dried) form, many peptides can remain stable at room temperature for short periods, although cooler conditions are always preferred