High levels of which type of fat can lead to cardiovascular issues?

High levels of saturated fats can lead to cardiovascular issues primarily because they can raise the levels of low-density lipoprotein (LDL) cholesterol in the blood. LDL cholesterol is often referred to as "bad" cholesterol because elevated levels are associated with the buildup of plaque in the arteries, which can contribute to atherosclerosis— a condition that narrows and hardens the arteries and increases the risk of heart attacks and strokes.

Dietary sources of saturated fats include animal products like red meat, butter, and full-fat dairy products, as well as certain plant oils. When consumed in excessive amounts, these fats can disrupt the balance of lipid levels in the bloodstream, leading to increased cardiovascular risks.

By contrast, monounsaturated fats and polyunsaturated fats, which are found in foods like olive oil, nuts, and fish, are generally considered beneficial for heart health as they can help improve cholesterol levels. Omega-3 fats, a type of polyunsaturated fat, are particularly known for their protective effects against heart disease. Therefore, the concern lies significantly with high saturated fat intake rather than the other types of fats mentioned.