where do long-chain fatty acids first enter the bloodstream
Blood lipids ( or blood fats ) are lipids in the blood , either free or bound to other molecules . They are mostly transported in a protein capsule , and the density of the lipids and type of protein determines the fate of the particle and its influence on metabolism . The concentration of blood lipids depends on intake and excretion from the intestine , and uptake and secretion from cells . Blood lipids are mainly fatty acids and cholesterol . Hyperlipidemia is the presence of elevated or abnormal levels of lipids and / or lipoproteins in the blood , and is a major risk factor for cardiovascular disease .