Unsaturated fatty acids are types of fats that contain one or more double bonds in their chemical structure. They are typically found in plant oils, nuts, seeds, and fish. These fats are considered healthier than saturated fats because they can help lower bad cholesterol levels and reduce the risk of heart disease. There are two main types of unsaturated fatty acids: monounsaturated fatty acids and polyunsaturated fatty acids. Monounsaturated fats, found in olive oil and avocados, have one double bond, while polyunsaturated fats, found in fatty fish and flaxseeds, have multiple double bonds. Both types are essential for maintaining overall health.