<prompt> Lipotropic factor are all exceptCholineLecithinArginineMethionine  <response>: ArginineLipotropic factors are substances which prevent the accumulation of fat TGs in the liver.Primary lipotropic factors choline, betaine, methionine, lecithin, inositol.Other factors with some lipotropic action:- Vitamin-B12, folic acid, casein, glycine, essential fatty acids, selenium, vitamin E and serine. 