Combining Berberine and L Carnitine can be beneficial for weight management, metabolism, and overall health. Berberine may improve insulin sensitivity, lower blood sugar, and support weight loss, while L carnitine helps the body use Muscle Specific Deletion of Carnitine Acetyltransferase Compromises Glucose Tolerance and Metabolic Flexibility ScienceDirect Amazon.com: SIRENLABS L Carnitine Elite Burn Liquid Keto Fat Burner and Metabolism Activator Fat Loss Support Keto Friendly Weight Loss Increase Energy Stimulant Free Strawberry Blast 3000mg (32 Servings) : Role of carnitine in disease Nutrition & Metabolism Springer Nature Link Dietary supplementation of l carnitine ameliorates metabolic syndrome independent of trimethylamine N oxide produced by gut microbes in high fat diet induced obese mice Food & Function (RSC Publishing)