Olive oil

Although olive oil is almost 100 per cent fat, it is rich in nutrients and compounds that can help protect against age-related disease. It is high in monounsaturated fats, which lower levels of harmful LDL cholesterol while protecting the levels of "good" HDL cholesterol, and thus helps fight heart disease and stroke. Olive oil also contains squalene and oleuropein, which are powerful antioxidants, protecting blood cholesterol from oxidation. This antioxidant effect may also reduce the risk of some cancers, particularly of the breast and colon. Top-quality, cold-pressed oils contain more of the protective compounds.