Eating more soluble fiber (found in foods such as Brussels sprouts, oatmeal, apples and kidney beans) can reduce the absorption of cholesterol into your bloodstream.

Research dating back to the 90s shows that low levels of HDL cholesterol (sometimes called "good cholesterol") is significantly lower in many patients with major depressive disorder than in non-depressed patients.

Being overweight or obese can increase LDL, which is the kind of lipoprotein that's been linked to heart disease. LDL is often referred to as the "bad cholesterol", because a high LDL level leads to a buildup of cholesterol in your arteries.

Your body does need some types of cholesterol to stay healthy. For example, cholesterol is essential in building cells and making hormones. However, while HDL cholesterol can lower your risk for heart disease and stroke, LDL cholesterol raises it.

Saturated fat actually raises your LDL levels more than anything else in your diet. It is found in red meat, dairy products, deep-fried foods and processed foods.