One scrumptious cheese sandwich can contain almost 15g of saturated fat which is equal to five pieces of deep-fried chicken, says a new research.
Dietician Sian Porter found cheddar and pickle sarnie from sandwich chain Eat contained 14.6g of saturated fat.
Pret a Manger's buttie had 14.3g, Tesco's had 13.7g and one from Sainsbury's contained 13g.
The recommended daily limit for women is 20g, and 30g
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for men.
"We don't realise how much saturated fat a cheese sandwich can contain," The Sun quoted Porter, as saying.
Saturated fat affects cholesterol, which can cause heart disease.
Jim Winship of the British Sandwich Association said: "It's ludicrous. Other foods have much higher fat levels."