Yes, we need to watch what we eat and drink as they can both have pretty negative effects on our overall health and general well-being. There are hundreds upon hundreds of examples of unhealthy foods, probably thousands upon thousands in fact, but here's a look at 4 of the absolute worst examples you could imagine.
Pizza - Though it tends to taste pretty great, pizza has a reputation for being extremely unhealthy indeed. The meal itself is high in carbohydrates, and saturated fat, which is a dangerous combination in itself. On top of that, there's the fact that the dough is often made from a combination of water, hydrogenated oils, and processed white flour, which is far, far unhealthier than whole meal flour. The dough is then topped with a tomato puree, before being finished off with a liberal helping of full-fat cheese and often a number of cooked meats as well. There are healthier alternatives, but for the most part, pizza is a greasy food with very little nutritional value.
Doughnuts - If you want an example of a food that is truly extremely harmful for your health, and your waistline as well, then doughnuts are what you'll find. They're made from a dough/batter that's made from processed white flour, sugar, and other artificial additives. It's then shaped into a ring or a ball, and is dropped into vegetable oil or fat and deep fried until crispy on the outside and doughy on the inside. It's then dusted with sugar and icing, and often filled full of sugary jam or cream. Doughnuts contain huge traces of sugar making them a big contributor towards diabetes.
French fries - French fries are another example of a food that's high in fat and carbohydrate, as well as salt too. Any food that is deep fried is unhealthy as it is cooked in pure fat or oil, but French fries are even worse as they're so small, so they have an increased surface area. The bigger the surface area, the more fat and oil they're able to absorb.
Fizzy drinks - OK, they're not exactly a food, but fizzy drinks are absolutely awful, which is why they made the list. These drinks contain no nutritional value in the slightest, and they're rich in sugar, making them prime examples of empty calories. One can of cola for example, contains almost 10 teaspoons full of sugar, and that's just one can. Drinking just two cans a day will yield around 20 teaspoons full of sugar, which is not good in the slightest.