If the body has too little HDL or too much LDL, there can be a problem. The levels of these substances are greatly influenced by diet. If the HDL level is 80 and the LDL level is 120, you are considered low risk for heart disease. As the HDL level decreases, your potential for heart problems intensifies, even if the total is on the low side. An HDL level under 35 is considered risky.
Cholesterol is insoluble in water.
It must be attached to a protein in order for it to be carried in the blood. This link to a protein is called a lipoprotein. Overindulgence in cholesterol-containing foods is dangerous, causing elevated blood cholesterol and triglycerides. These fats produce placque-filled arteries that impede flow of blood to the brain, kidneys, genitals, extremities, and the heart. High cholesterol levels are the major cause of heart disease, fatty deposits in the arteries , and cerebrovascular and cardiac insufficiency.