You should avoid eating large amount of SATURATED FATS.
Saturated fats are those fats which chemically are made up of single bonds. This type of fat can be found in food such as animal fat, [for instance, butter, cheese, cream etc.], whole meat dairy product and fatty meats, coconut oil, palm kernel oil, etc.
Saturated fats are bad for the heart because it can raise the amount of LDL cholesterol in the blood thus increasing the risk of heart diseases.
It is important because you need vitamins and minerals from them e.g. Scurvy no vitamin c