l-carnitine tartrate sigma & L-Tartrate Capsule It enhances mental focus and alertness by increasing memory related functions Klaire Labs, L-Carnitine Tartrate 500

Some people use it to keep their heart healthy

2001 61(9):3599 - 3603 Image thanks to Nature American Egg Board animal fat animal products antibiotics beans bile acids bone cancer bone health brain health cancer cancer survival cardiovascular disease carnitine chicken cholesterol choline dairy eggs energy drinks fat fiber fish fruit grains gut flora Harvard heart disease industry influence inflammation LDL cholesterol lecithin meat men's health microbiome milk mortality obesity organ meats Plant-Based Diets poultry prebiotics prostate cancer red meat saturated fat seafood stroke supplements surgery TMAO turkey vegans vegetables vegetarians weight loss Republishing "Carnitine, Choline, Cancer, & Cholesterol: The TMAO Connection" Terms You may republish this material online or in print under our Creative Commons licence

Obviously it doesn't replace exercise and a good diet, and only provides a little extra at least for me, but it helps considering the slips in diet derived from our lifestyle