carnitine
noun
car·ni·tine ˈkär-nə-ˌtēn 
: a quaternary ammonium compound C7H15NO3 that is present especially in vertebrate muscle, that in the levorotatory form is involved in the transfer of fatty acids across mitochondrial membranes, and in humans is obtained from food (such as meat or milk) or is synthesized chiefly in the liver and kidneys from a lysine derivative
Example Sentences
Recent Examples on the Web Some of the nutrients in meat such as carnitine, L-arginine, and zinc may help with blood flow. 
Bruce Y. Lee, Forbes, 13 Mar. 2022 Add foods and high-quality supplements such as turmeric, omega-3s, vitamin B12, ginkgo biloba, phosphatidylserine, citicoline and acetyl-l-carnitine to enhance mental clarity and cognitive function. Serena Poon, Forbes, 24 Feb. 2021 Brandi has carnitine-acylcarnitine translocase (CACT) deficiency, a serious condition where her body cannot use certain types of fats as a source of energy. Ashley Killough And Ed Lavandera, CNN, 1 Dec. 2020 Energy drinks, while sporting much less sugar than their rivals, contain potentially dangerous stimulants such as caffeine, guarana, taurine, ginseng, l-carnitine and creatine. Sandee Lamotte, CNN, 23 June 2020 The supplement that started it all, L-carnitine, was not banned and not considered off limits if infused at amounts of 50 milliliters or less. BostonGlobe.com, 2 Oct. 2019 His penalty stemmed from violations that included trafficking in testosterone, tampering with the doping control process and administering improper infusions of L-carnitine, a naturally occurring substance that converts fat into energy. Matthew Futterman, New York Times, 6 Oct. 2019 Among other allegations, Salazar and Brown are accused of possessing and trafficking testosterone gel and using infusions of a supplement called L-carnitine that can greatly enhance athletic performance. oregonlive, 27 Dec. 2019 The supplement that started it all, L-carnitine, was neither banned nor considered off limits if infused at amounts of 50 milliliters or less. Washington Post, 2 Oct. 2019 See More
Bruce Y. Lee, Forbes, 13 Mar. 2022 Add foods and high-quality supplements such as turmeric, omega-3s, vitamin B12, ginkgo biloba, phosphatidylserine, citicoline and acetyl-l-carnitine to enhance mental clarity and cognitive function. Serena Poon, Forbes, 24 Feb. 2021 Brandi has carnitine-acylcarnitine translocase (CACT) deficiency, a serious condition where her body cannot use certain types of fats as a source of energy. Ashley Killough And Ed Lavandera, CNN, 1 Dec. 2020 Energy drinks, while sporting much less sugar than their rivals, contain potentially dangerous stimulants such as caffeine, guarana, taurine, ginseng, l-carnitine and creatine. Sandee Lamotte, CNN, 23 June 2020 The supplement that started it all, L-carnitine, was not banned and not considered off limits if infused at amounts of 50 milliliters or less. BostonGlobe.com, 2 Oct. 2019 His penalty stemmed from violations that included trafficking in testosterone, tampering with the doping control process and administering improper infusions of L-carnitine, a naturally occurring substance that converts fat into energy. Matthew Futterman, New York Times, 6 Oct. 2019 Among other allegations, Salazar and Brown are accused of possessing and trafficking testosterone gel and using infusions of a supplement called L-carnitine that can greatly enhance athletic performance. oregonlive, 27 Dec. 2019 The supplement that started it all, L-carnitine, was neither banned nor considered off limits if infused at amounts of 50 milliliters or less. Washington Post, 2 Oct. 2019 See More Word History
Etymology
International Scientific Vocabulary, from Latin carn-, caro
First Known Use
circa 1922, in the meaning defined above
Medical Definition
carnitine
noun
car·ni·tine ˈkär-nə-ˌtēn
: a quaternary ammonium compound C7H15NO3 that is present especially in vertebrate muscle, is involved in the transfer of fatty acids across mitochondrial membranes, and in humans is obtained from food (as meat or milk) or is synthesized from a lysine derivative