An energy source. In the liver, fatty acids are incorporated into triglycerides and secreted as VLDL; in the intestines, fatty acids are incorporated into triglycerides and secreted as chylomicrons.
Fat by-products. The presence of triglycerides in the blood is a risk factor for heart disease and indicates that the body is not metabolizing fat properly. Triglycerides can be reduced through exercise if thyroid hormone levels are normal.
The form in which fat is stored in the body. during digestion, triglycerides from food are broken down and then reconstituted in the cells of the intestine walls, before passing into the bloodstream. studies suggest there is a link between raised levels of triglycerides in the blood and the risk of heart disease. But other forms may be involved, too, physical exercise has been shown to reduce the presence of triglycerides in the blood, while consuming a lot alcohol can increase it.