Почему нельзя употреблять фаст-фуд? каких не будь 6 предложений.

Fast food is unhealthy. It is tasty but very harmful. You never know what is actually part of a hamburger. Under what conditions it was cooked, or fresh and quality products. And the fast food is harmful, not only because of this. With frequent consumption of it, there may be diseases such as gastritis, obesity or ulcers because it is fatty food.