Saturated Fats are found in foods such as butter, milk, yogurt, cheese, mayo, salad dressings and meat. Consume saturated fat in moderation. A high intake of saturated fats can increase blood cholesterol levels. This can then lead to blockage in the arteries and possibly heart disease. Unsaturated Fats usually come from plants including avocado, olive and vegetable oils, seeds, nuts, fish, flaxseed and others. Unsaturated fats have shown many health benefits, including decreased harmful cholesterol levels. Some of these healthy fats are not made in the body and must be consumed in your diet.