Frontiers Association between fatigue, peripheral serotonin, and L carnitine in hypothyroidism and in chronic fatigue syndrome Gut microbiota metabolism of l carnitine and cardiovascular risk ScienceDirect Dietary allicin reduces transformation of L carnitine to TMAO through impact on gut microbiota ScienceDirect Unraveling the Formation Mechanisms of Trimethylamine N Oxide and Its Inhibition by Food Ingredients: Toward Cardioprotective Food Development Journal of Agricultural and Food Chemistry Dietary allicin reduces transformation of L carnitine to TMAO through impact on gut microbiota ScienceDirect