The use of a considerable quantity of fruit sugar harms to a liver. This opinion of the American researchers which add that it is true and for the products rich with so-called transfat acids. These acids contain in industrially processed products. Fruit sugar contains not only in fruit, it is the important making part of diabetic products. Experts of magazine “Hepatology” write that about 10 % of all the used person of calories occur their fruit sugar which, as well as transfat acids, can lead to a fat liver. Irony that people use a considerable quantity of dietary products, including their the most correct and healthy food. Together with them the considerable quantity of fruit sugar conducting to diseases of a liver also gets to an organism, characteristic for corpulent people.