L Carnitine and Sleep: Does It Affect Rest or Sleep Quality? When to Take L Carnitine for Optimal Training Benefits Transparent Labs Supplement of the week: L Carnitine! This one doesn't just boost fat metabolismit can also improve recovery, endurance, and even brain function. If you're serious about performance and longevity, this might be L Carnitine Linus Pauling Institute Oregon State University Amazon.com: Cutler Nutrition Liquid L Carnitine Fat Burner Supplement with Acetyl L Carnitine & L Carnitine Tartrate Fat Burner Formula for Optimal Absorption, Energy & Muscle Support Sour Gummy Flavor : Health & Why To Much L Carnitine Is Unhealthy