No one eats perfectly all the time - even dietitians! But when bad habits become common practice, you can end up with weight gain, high cholesterol, high blood pressure and a host of other potential health problems.
1. Sugary Drinks
Added sugar is the single worst ingredient in the modern diet. However, some sources of sugar are worse than others, and sugary drinks are the absolute worst. When people drink sugar calories, the brain doesn't "register" them as food. For this reason, people don't automatically compensate by eating less of other foods instead, and end up drastically increasing their total calorie intake.
2. Most Pizzas
Pizza is one of the world's most popular junk foods. This is not surprising, given that it tastes awesome and is incredibly convenient to eat. The problem is that most commercially prepared pizzas are made with seriously unhealthy ingredients. The dough is made from highly refined wheat flour, and the meats on them are usually processed. Pizza is also extremely high in calories.
3. White Bread
Bread is generally made from wheat, which contains the protein gluten. For this reason, all wheat-based breads are a bad idea for people who have celiac disease or gluten sensitivity. However, most commercial breads are unhealthy, even for people who do tolerate gluten. This is because the great majority of them are made from refined wheat, which is low in essential nutrients (empty calories) and leads to rapid spikes in blood sugar.
4. Most Fruit Juices
Fruit juice is often assumed to be healthy, but this is a mistake. Many fruit juices are actually little more than fruit-flavoured sugar water. It is true that the juice contains some antioxidants and vitamin C, but this must be weighed against the large amount of liquid sugar. In fact, fruit juice contains just as much sugar as a sugary drink like Coke or Pepsi, and sometimes even more.
5. Pastries, Cookies and Cakes
Most pastries, cookies and cakes are extremely unhealthy. They are generally made with refined sugar, refined wheat flour and added fats, which are often disturbingly unhealthy fats like shortening (high in trans fats). These tasty treats are literally some of the worst things that you can put into your body. Almost no essential nutrients, but tons of calories and unhealthy ingredients.