Advances in Clinical and Experimental Medicine Dietary allicin reduces transformation of L carnitine to TMAO through impact on gut microbiota ScienceDirect What Is Carnitine? TMAO? What's Their Link To Red Meat? Pritikin Characterization of TMAO productivity from carnitine challenge facilitates personalized nutrition and microbiome signatures discovery Microbiome Springer Nature Link Low Bioavailability and High TMAO Production: Novel Insights Into Acetylcarnitine and Carnitine Metabolism KrimsDavis 2025 Molecular Nutrition & Food Research Wiley Online Library