SLC25A45 is required for mitochondrial uptake of methylated amino acids and de novo carnitine biosynthesis: Molecular Cell Carnitine octanoyltransferase is important for the assimilation of exogenous acetyl L carnitine into acetyl CoA in mammalian cells Journal of Biological Chemistry Understanding Glycolysis in Human Metabolism The Medical Biochemistry Page Low Bioavailability and High TMAO Production: Novel Insights Into Acetylcarnitine and Carnitine Metabolism KrimsDavis 2025 Molecular Nutrition & Food Research Wiley Online Library Should I Take Acetyl L Carnitine or L Carnitine HealthAid