fat is part of a diet called ketogenic diet
in this sense besides the triglycerides the term would include several other types of compounds like mono and diglycerides phospholipids such as lecithin sterols such as cholesterol waxes such as beeswax and free fatty acids which are usually present in human diet in smaller amounts
acne according to a 2015 study trans fats are one of several components of western pattern diets which promote acne along with carbohydrates with high glycemic load such as refined sugars or refined starches milk and dairy products and saturated fats while omega3 fatty acids which reduce acne are deficient in western pattern diets