Increased Risk of Heart Disease (In Some Cases) Some studies have suggested that high levels of L-carnitine might promote the formation of trimethylamine-N-oxide (TMAO) in the body, which has been linked to an increased risk of atherosclerosis (hardening of the arteries) and heart disease
Consider long-term access before starting
Supply shortages through 20232024 have eased, and all three branded products are broadly available as of April 2026
Nausea, constipation, fatigue, and digestive discomfort are frequently reported
Brandon Lucke-Wold also received funding from an American Medical Association Foundation Seed Grant, Neurosurgery Research and Education Foundation Medical Student Fellowship, and Sigma Xi Grants-in-Aid-of-Research
The key is consistency, which allows you to maintain those optimal levels