There are several different types of cholesterol. High-Density Lipoprotein (HDL) is referred to as "good" cholesterol and helps protect against heart disease. HDL should remain high, as it works to get bad cholesterol out of the body. The American Heart Association recommends that men and women should keep their HDL levels above 60mg/dL.
Low-Density Lipoprotein (LDL) is known as "bad" cholesterol and contributes to the build-up of plaque around the artery walls (atherosclerosis). Atherosclerosis can cause the arteries to harden or rupture and lead to heart disease. The American Heart Association and the National Heart, Lung, and Blood Institute both state that everyone's LDL should be below 100 for optimal health.
Triglycerides are another type of lipid in the bloodstream that is made up of extra calories that the body doesn't use. A triglyceride level below 150 mg/dL is considered normal. High levels of triglycerides often go hand-in-hand with high levels of LDL or low levels of HDL.
It's important to have your cholesterol levels tested regularly. Your doctor can use a simple blood test called a fasting lipid to diagnose high cholesterol. Lifestyle changes, such as eating a high-fiber diet and exercising regularly can help to keep cholesterol levels down. In addition to lifestyle changes, your doctor may recommend taking high cholesterol medications.
source: http://veryarticles.com/high-cholesterol-understanding-common-disorder/168305/
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