Diets high in trans and what other type of fatty acid contribute to chronic diseases, including heart disease and cancer?

Answer: Saturated Fatty Acids

Explanation: Saturated fats are one's in which fatty Acids chains

Largely or totally contains a single bond. Most animal fats contains high proportion of Saturated Fatty acid such as milk, cheese and butter. Foods like pizza, sausage also have high proportion of Saturated Fatty acid.