Biology 11th Edition by Cecie Starr ,Ralph Taggart

Exercise 14

It seems there are "good" and "bad" unsaturated fats. The double bonds of both put a bend in their fatty acid tails. The bend in trans fatty acid tails keeps them aligned in the same direction along their length. The bend in cis fatty acid tails makes them zigzag
Some trans fatty acids occur naturally in beef. But most form by industrial processes that solidify vegetable oils for margarine, shortening, and the like. These substances are widely used in prepared foods (such as cookies) and in french fries and other fast-food products. Trans fatty acids are linked to heart attacks. Speculate on why the body handles cis fatty acids better than trans fatty acids.