l carnitine covid 19 COVID:19: L-carnitine supplement may have protective effect L-Carnitine Market Procurement Intelligence Report
Description
ALC has also been reported to exert cholinomimetic effects and to modulate the gamma-amino butyric acid (GABA) system

They didnt rely on the supplement alone

Once these nutrients are transported into cellular mitochondria, they are converted into energy
Mitochondrial dysfunction in post-infectious fatigue The SARS-CoV-2 virus primarily damages lung cells, thus affecting the respiratory system and causing acute respiratory distress, resulting in low blood and tissue oxygen levels

Your body makes less L-Carnitine as you age, which is one reason metabolism slows and fat storage increases over time
