Which type of fats can help increase high density lipoprotein (HDL) levels?

Unsaturated fats are beneficial in raising high-density lipoprotein (HDL) levels, often referred to as "good" cholesterol. HDL is important because it helps transport cholesterol from the arteries and other tissues back to the liver, where it can be processed and excreted. Increasing HDL levels can reduce the risk of heart disease and improve overall cardiovascular health.

Unsaturated fats, which include monounsaturated and polyunsaturated fats, are commonly found in foods such as olive oil, avocados, nuts, seeds, and fatty fish. These fats not only support higher HDL levels but can also help lower low-density lipoprotein (LDL) cholesterol, known as "bad" cholesterol, further promoting a healthier lipid profile.

The other options, while related to dietary fats and cholesterol, do not offer the same benefits for increasing HDL. Saturated fats tend to raise LDL cholesterol levels, which may increase the risk of cardiovascular disease. Trans fats are known to contribute to health issues by increasing LDL and decreasing HDL levels. Cholesterol itself is a type of fat necessary for certain bodily functions, but consuming cholesterol does not significantly impact HDL levels compared to unsaturated fats.