Cholesterol is a waxy substance found in your bloodstream that maintains proper functioning of your cells, hormones and bodily functions. Too much cholesterol, known as high blood cholesterol, can lead to heart disease, stroke and coronary artery disease.

Low-density lipoproteins

Low-density lipoproteins are commonly known as "bad" cholesterol as it builds up on your arterial walls and inhibits proper blood flow. As the cholesterol plaque builds up, the heart works harder to pump blood.

Source

Foods that are high in unhealthy fats contribute to high cholesterol levels. These unhealthy fats include saturated fat and trans fat, also known as partially hydrogenated oil. Saturated fat is found in baked goods, dairy, butter, desserts, fried food and meat. Trans fat is found in fried foods and processed foods.

Effects

Stroke, heart disease and coronary artery disease are common side effects from high blood cholesterol. A stroke can occur when there is poor blood flow to the brain.

Prevention

Eat whole grain foods over white flour, as they help lower cholesterol. Increase fruit and vegetable consumption, as they contain dietary fiber that lowers LDL levels. Limit saturated fat and eliminate trans fat to reduce high blood cholesterol.

Misconceptions

Although you may be on heart medication to help maintain a healthy blood cholesterol level of under 200 mg/dL, you still need to limit your cholesterol intake according to your doctor's directions.

Source:

American Heart Association: LDL and HDL Cholesterol: What's Bad and What's Good?

Mayo Clinic: High Blood Cholesterol