Good fat cuts heart risk by a fifth, study shows

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A Harvard Medical School study says for every 5% increase in polyunsaturated fat consumption there was a 10% fall in heart disease.

The reports adds to the growing evidence about polyunsaturated fats, found in some fish and vegetable oils.

The team analyzed the findings from eight previous studies, covering more than 13,000 people, in their research.

Saturated fats raise the levels of bad cholesterol that block the arteries to the heart.

In comparison, polyunsaturated fats have the opposite effect by increasing the levels of good cholesterol.

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