She found this when she put study subjects on a vanilla-flavored drink low in saturated fat.

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The claim states that a diet rich in whole-grain foods and low in saturated fat and cholesterol may help reduce the risk of heart disease.

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She said it was also important to remember that regular physical activity combined with a diet high in fruit and vegetables and low in saturated fat was still the best way to combat high cholesterol and reduce the risk of heart disease.

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Still, if you're trying to limit saturated fat in your diet by enjoying low- and fat-free foods, the trade-off may be worth it if you limit sodium in other areas.

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It contains heart-healthy unsaturated fats, including linoleic acid, and is low in artery-clogging saturated fat.

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Tofu is low in fat (virtually free of saturated fat) and has few calories than meat.

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Foods also scored points for having low amounts of added sugar, sodium and saturated fat.

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Many low-carb or no-sugar products still contain large amounts of saturated fat, which can raise bad cholesterol and increase your risk of heart disease.

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Which? compared the nutritional content of the bars using the manufacturers' information and applied traffic light labelling to see if the levels of fat, saturated fat, sugar and salt were high, medium or low.

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