Which type of fat is considered unhealthy and should be limited?

Trans fats are considered unhealthy because they are associated with an increased risk of heart disease and other health issues. These fats are artificially created through a process called hydrogenation, which solidifies liquid oils. They can raise levels of LDL cholesterol (often referred to as "bad" cholesterol) in the blood while simultaneously lowering levels of HDL cholesterol (known as "good" cholesterol"). This imbalance can lead to the buildup of plaque in the arteries, heightening the risk of cardiovascular problems.

In contrast, monounsaturated fats, polyunsaturated fats, and omega-3 fatty acids are generally viewed as healthier options. Monounsaturated fats can help reduce bad cholesterol levels and provide other heart health benefits. Polyunsaturated fats, including sources like fish and nuts, also contribute positively to heart health. Omega-3 fatty acids, a type of polyunsaturated fat found in fish, flaxseeds, and walnuts, are particularly beneficial due to their anti-inflammatory properties and protective effects against heart disease. Therefore, it's essential to limit trans fats to maintain a healthy diet and reduce the risk of chronic diseases.