Experts have warned that eating a well-done steak or hamburger could put you at a greater risk of heart disease.
They have found that searing red meat activates harmful chemicals associated with cardiovascular disease, the Daily Express reported.
Professor Karen Chapman- Novakofski, of the University of Illinois and colleagues have concluded that foods cooked at very high temperatures produce end products linked to heart disease.
The study found a stronger link to heart disease from the by-products in cooking than the harmful saturated fat in food.
Diabetes sufferers at risk of heart disease are warned to avoid cooking methods that leave a crust on meat.
The study has been published in the International Journal of Food Sciences and Nutrition.