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The media is full of advice on what you should and should not eat, but these recommendations often change from year to year. You may have heard that polyunsaturated fats are heart healthy and saturated fats are not, but is it really that simple?Part AHow is the chemical structure of saturated fats different from that of unsaturated fats?-Saturated fats have fatty acid tails with only C−C bonds while unsaturated fats have one or more C=C bonds in the tails.-Saturated fats have one long fatty acid tail with only C−C bonds while unsaturated fats have several short tails with one or more C=C bonds.-Saturated fats have fatty acid tails with only C=C bonds while unsaturated fats have one or more C−C bonds in the tails.-Saturated fats have one long fatty acid tail while unsaturated fats have one or more short tails.

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