A selection of diet advice books
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Saturated fats could help prevent heart disease

23 October 2013 Last updated at 10:50 BST

A cardiologist is disputing the idea that all saturated fats are unhealthy.

Dr Aseem Malhotra, a cardiology registrar at Croydon University Hospital, has written in the British Medical Journal that saturated fat from non-processed food might even help prevent heart problems.

John Maguire reports.