Ashley’s answer: Great question. This research study about the possible link between L-carnitine and heart disease is really interesting. It reveals that those who regularly eat meat may have more of a certain bacteria (this bacteria feeds on L-carnitine and gives off a metabolite called TMAO, which could increase risk of heart disease). Though we still need more research, there are many good reasons to only eat high-quality animal sources, like those that are organic and grass-fed. Consider reducing your overall intake of the richest sources of L-carnitine, beef and pork, and think twice about dietary supplements that contain this ingredient. Chicken and seafood are significantly lower in L-carnitine, and fish contains heart-healthy essential fatty acids. While most dairy is also lower than beef and pork in terms of L-carnitine, concentrated sources of whey, such as certain yogurts, protein supplements, and bars, will have higher levels of L-carnitine (or even add it as a supplement.) As I noted earlier, I believe we need to know more before we can make sweeping recommendations against L-carnitine-rich foods, but based on this information, I do think we should reconsider dietary supplementation of the nutrient until further research. Chewing over a food quandary? Send it to AskAshley@Prevention.com Ashley Koff is a registered dietitian, Qualitarian, nutrition expert, and
