Beta Blockers Cause Insomnia: Here's What to Do Life Extension A carnitine transporter at the bloodbrain barrier modulates sleep via glial lipid metabolism in Drosophila PNAS L Carnitine Linus Pauling Institute Oregon State University Targeting Skeletal Muscle Dysfunction With L Carnitine for the Treatment of Patients With Chronic Obstructive Pulmonary Disease In Vivo If you are like a lot of people, you may have never heard of carnitine but this important nutrient is critical for our body's ability to optimally burn fat required for energy.