l carnitine metabolism in liver L-carnitine biosynthesis. L-carnitine can be partly provided by an Carnitine Metabolism and Its Role

Levocarnitine deficiency can occur either due to a systemic deficiency at birth, various metabolic disorder, or due to end-stage kidney disease and haemodialysis management

doi: 10.1002/mnfr.201300033

daily energy restriction on weight loss and metabolic disease risk markers in overweight women.Harvie M1, Wright C, Pegington M, McMullan D, Mitchell E, Martin B, Cutler RG, Evans G, Whiteside S, Maudsley S, Camandola S, Wang R, Carlson OD, Egan JM, Mattson MP, Howell A Short- and long-term effects of continuous versus intermittent restrictive diet approaches on body composition and the metabolic profile in overweight and obese postmenopausal women: a pilot study.Arguin H1, Dionne IJ, Snchal M, Bouchard DR, Carpentier AC, Ardilouze JL, Tremblay A, Leblanc C, Brochu M

Another source is the food we eat where the primary source is meat

L-Carnitina de Novadiet, es un complemento alimenticio a base de carnitina, aminocido esencial que se sintetiza en el hgado, los riones y el cerebro, a partir de dos aminocidos esenciales, la lisina y la metionina