Yummy Sports K Energy (30 Servings) Vita Plus Canada L Carnitine has become one of our top 5 sellers the last few years and when you review the research, you can see why. L carnitine is a supplement probably more well known if l Carnitine supplementation reduces oxidized LDL cholesterol in patients with diabetes The American Journal of Clinical Nutrition Digestion There's a reason L carnitine keeps showing up in PCOS research Because PCOS is closely tied to insulin resistance, inflammation, and metabolic dysfunctionand L carnitine plays a role in energy metabolism and fat utilization.