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How do regular versions sometimes earn more stars than low-fat or diet versions of a food?

Although the algorithm debits for saturated fat and trans fat, it does not debit for total fat so this can explain why some full fat products receive stars. Although the total fat is high, it is mainly heart-healthy unsaturated fat. In some cases, a product’s low fat counterpart may receive fewer stars because manufacturers may add sugar or salt for taste in the low fat version. In keeping with current evidence, Guiding Stars evaluates fat quality rather than fat content.