Here are the foods that contain the most L-carnitine per serving, according to the National Institutes of Health: Beef steak, cooked, 4 ounces: 56162 milligrams Ground beef, cooked, 4 ounces: 8799 milligrams Whole milk, 1 cup: 8 milligrams Codfish, cooked, 4 ounces: 47 milligrams Chicken breast, cooked, 4 ounces: 35 milligrams Ice cream, 1/2 cup: 3 milligrams Cheddar cheese, 2 ounces: 2 milligrams Whole wheat bread, 2 slices: 0.2 milligram Asparagus, cooked, 1/2 cup: 0.1 milligram Different Types L-carnitine is the standard biologically active form of carnitine, which is found in your body, foods, and most supplements

Tomar D, Dong Z, Shanmughapriya S, Koch DA, Thomas T, Hoffman NE, Timbalia SA, Goldman SJ, Breves SL, Corbally DP, Nemani N, Fairweather JP, Cutri AR, Zhang X, Song J, Jaa F, Huang J, Barrero C, Rabinowitz JE, Luongo TS, Schumacher SM, Rockman ME, Dietrich A, Merali S, Caplan J, Stathopulos P, Ahima RS, Cheung JY, Houser SR, Koch WJ, Patel V, Gohil VM, Elrod JW, Rajan S, Madesh M (2016) MCUR1 is a scaffold factor for the MCU complex function and promotes mitochondrial bioenergetics
Another animal study showed that inhibition of TMAO formation can upregulate the host hepatic bile acid synthetic enzyme CYP7A1 and alter the expression of hepatic genes critical for bile acid feedback regulation, thus preventing diet-driven hepatic cholesterol accumulation (Pathak et al., 2020)
doi: 10.1101/gad.3.4.488 22 BaselerW