L Carnitine: Benefits, Uses, and Side Effects Lifespan Research Institute Gut lactate increases circulating l Lac Phe and key metabolites linked to GLP 1 and human health American Journal of Physiology Endocrinology and Metabolism American Physiological Society L carnitine is an amino acid derivative that plays a crucial role in the body's energy production processes. As an injectable supplement, L carnitine has been employed to support various health conditions, including heart Impaired sliding between the lower esophageal sphincter and crural diaphragm (esophageal hiatus) in patients with achalasia esophagus American Journal of Physiology Gastrointestinal and Liver Physiology American Physiological Society A High Throughput Integrated Nontargeted Metabolomics and Lipidomics Workflow Using Microelution Enhanced Matrix Removal Lipid for Comparative Analysis of Human Maternal and Umbilical Cord Blood Metabolomes Analytical Chemistry