I am talking about fast food from such popular chains as KFC, McDonald's, Burger King and similar.
Assortment of the chains typically include the following: hamburgers/whoppers, cheeseburgers, sandwiches, French fries (chips), fried chicken and so on.
Is eating such fast food on regular basis (3-5 times a week) really bad/harmful for health and may lead to sensible health problems. I'm not talking about weight gain or loss. I mean real problems with digestive apparatus, liver, pancreas, spleen or some vital organs causing further significant problems with health. It is also often stated that such food is carcinogenic and may lead to cancer.
Is it all close to truth or it is just a myth/stereotype?