Cereals are used in many kinds of food products. The most common cereals that we eat on a daily basis are wheat, oat and rye. 

Fruits (such as apples and bananas), vegetables and root vegetables are also an important part of our diet. According to modern nutritional guidelines, one half of each meal should consist of plant-based food such as fruits, vegetables and root vegetables. 

Fruits and vegetables contain many important substances that we humans need in order to stay healthy. These substances include vitamins and nutrients. In addition, vegetables and fruits provide a source of fibre, which is important for our digestive system. Some plants also contain important proteins and carbohydrates. Because of this, even a completely plant-based diet is possible.