Saturated fats are often considered the "bad" fats because evidence has consistently shown that a high intake of saturated fats may lead to high cholesterol and an increased risk of heart disease. However, saturated fats do play a pivotal role in the production of hormones.
Sources: coconut oil, palm oil, animal proteins and products such as eggs, cheese, and butter. In general, the more marbling a meat has (white streaks visible before cooking), the higher the fat content.