Жири, or fats, are essential nutrients found in many foods. They provide energy, support cell growth, and help the body absorb certain vitamins, such as vitamin A, D, E, and K. Fats can be classified into different types, including saturated, unsaturated, and trans fats, each having varying effects on health. In addition to their nutritional role, жири are important for flavor and texture in cooking. Common sources of fats include oils, butter, nuts, and avocados. While fats are necessary for a balanced diet, it's important to consume them in moderation and choose healthier options when possible.