“You should avoid all fat to protect your heart.”
Strong confidence because fat is an essential nutrient class and cardiovascular guidance recommends replacing saturated and trans fats with unsaturated fats rather than eliminating all fat. Long-term randomized evidence shows fewer cardiovascular events when saturated fat is reduced, especially when replaced with polyunsaturated fat.
Avoiding all dietary fat is neither necessary nor healthy. For heart health, the type and replacement matter: favor unsaturated fats and limit trans fat and excess saturated fat.
Fat supplies essential fatty acids, supports cell function and helps absorb vitamins A, D, E and K. Replacing saturated fat with unsaturated fat is different from replacing it with refined carbohydrate, so “low fat” alone does not describe a heart-healthy pattern.
Safety note: Extremely restrictive diets can cause inadequate energy and nutrient intake. People with pancreatitis, gallbladder disease, fat-malabsorption disorders or prescribed therapeutic diets need individualized guidance about the amount and type of fat.
Talk to a healthcare professional if: Ask a clinician or dietitian for individualized advice if you have very high LDL cholesterol, established cardiovascular disease, fat-malabsorption symptoms, pancreatic or gallbladder disease, or an unusually restrictive diet.
Keep healthful fat sources in the diet. Heart protection comes from the overall pattern and what replaces saturated fat, not from eliminating fat.
Use foods such as nuts, seeds, olive oil, avocado and fish in sensible portions, and replace rather than simply add them when calories matter.
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