Overview
Fat is one of the three main macronutrients, along with carbohydrate and protein. Your body uses fat for energy, insulation, hormone production, and building cell membranes. Fats also help the body absorb fat-soluble vitamins such as A, D, E, and K.
Causes and Risk Factors
Not all fats affect health in the same way. Unsaturated fats, found in foods such as nuts, seeds, fish, avocados, and plant oils, are generally linked with better heart health. Saturated fats, often found in fatty meats, butter, ghee, cream, and some tropical oils, can raise LDL cholesterol in some people, while industrially produced trans fats are especially harmful to heart health.
Who Is Affected
Everyone needs some fat in the diet, but individual needs vary by age, health status, culture, and food access. People with high cholesterol, cardiovascular disease, diabetes, obesity, or a strong family history of heart disease may need to pay closer attention to the types of fat they eat. Infants and children also need fat for growth and development, so very low-fat diets may not be appropriate for them.
Prevention
Choosing fats from whole and less processed foods can support long-term health. Replacing foods high in trans fat and some sources of saturated fat with unsaturated fats may help lower cardiovascular risk. Reading nutrition labels and ingredient lists can help you spot hydrogenated oils and compare packaged foods.
Diet and Lifestyle
Helpful food patterns often include nuts, seeds, beans, fish, and plant oils such as olive, canola, peanut, or sunflower oil, depending on local availability and traditions. Limiting heavily fried foods, processed snacks, fatty processed meats, and baked goods made with hydrogenated oils can reduce less healthy fats. Overall eating pattern matters more than any single food, so balance, variety, and portion awareness are important.
Living With It
Learning about fats can make shopping, cooking, and eating out easier. Small changes, such as using plant oils instead of solid fats or choosing grilled foods more often than fried foods, can add up over time. If you have a medical condition that affects your diet, a doctor or registered dietitian can help you make a plan that fits your needs and culture.
Questions to Ask a Healthcare Professional
You may want to ask how different types of fat affect your personal health risks, especially if you have high cholesterol, heart disease, diabetes, liver disease, or digestive conditions. Ask whether food labels, blood cholesterol tests, or referral to a dietitian would be useful for you. It can also help to ask how to make realistic changes using foods that are affordable and familiar in your area.