l carnitine marathon running More than 95% of your L-Carnitine stores are contained in your muscles, along with trace amounts in your blood, liver, heart and kidneys. L- is an essential amino acid that helps you grade L I genuinely forgot': Mo Farah

Deminice, M

Carnitine Uses In addition to helping those with carnitine deficiencies, L-carnitine supplementation may benefit individuals with the following conditions: Carnitine for Heart Disease Studies suggest that people who take L-carnitine supplements soon after suffering a heart attack may be less likely to suffer a subsequent heart attack, die of heart disease, experience chest pain and abnormal heart rhythms, or develop congestive heart failure

Section Summary: L-carnitine supports fertility primarily by improving sperm health, motility, and count in men, and by supporting mitochondrial function and egg quality in women

However, a 2020 review notes that more research is necessary to support the use of L-carnitine for better exercise performance

However, compared with the intensive mechanistic studies of carnitine in mammals, the majority of the studies of carnitine in fish have only focused on the effects of carnitine on the fishs growth and body composition, whereas studies on the systemic regulation of nutritional metabolism by carnitine in fish, and the underlying mechanisms, are lacking