HDL helps the body to get rid of bad cholesterol. LDL contribute as accumulation in artery walls, cause risk of cardiovascular disease. The results were an analysis of five clinical trials of the low-fat diet compare low-carbohydrate diets. These studies attracted 447 participants in the age of 42 to 49 attention. chosen 222 must be low in carbohydrates and the 225 remaining should be the low-fat diet.