Healthy Fats Explained: Avocado, Olive Oil, and Nuts

Dietary fat was villainized for decades, but research has since clarified that the type of fat matters far more than the total amount for most health outcomes.

Monounsaturated and polyunsaturated fats

Olive oil, avocados, and nuts are rich in monounsaturated fats, linked in research to improved cholesterol profiles and heart health, while fatty fish, walnuts, and flaxseed provide polyunsaturated omega-3 fats associated with reduced inflammation and cardiovascular benefits.

Saturated fat: not villainized, but worth moderating

Found in butter, fatty meats, and coconut oil, saturated fat's relationship with heart disease has become more nuanced in recent research than once believed, but most major health organizations still recommend moderating intake in favor of unsaturated fats where practical.

Trans fat: the one to actually avoid

Artificial trans fats, once common in margarine and packaged baked goods, have a clear, strong link to heart disease and have been banned or heavily restricted in many countries — check ingredient lists for 'partially hydrogenated oil' to spot any that remain.

Fat still has 9 calories per gram

Even healthy fats are calorie-dense, so the practical goal isn't unlimited amounts of olive oil or nuts, but replacing less healthy fat sources (and some refined carbs) with these options within a reasonable total calorie intake.