Answer the following question given this paragraph: 

Another type of lipid is called trans fat . Trans fats are manufactured and added to certain foods to keep them fresher for longer. Foods that contain trans fats include cakes, cookies, fried foods, and margarine. Eating foods that contain trans fats increases the risk of heart disease.


Q: What lipid, added to certain foods to keep them fresher longer, increases the risk of heart disease?


A:
trans fat