Proteins are the building blocks of the human body, our skin, hair, nails, muscles and bones are all made up of proteins.
We need to provide our bodies with proteins so that muscles can be repaired and muscles can develop.
The best sources of protein in the diet are meat, fish, eggs, milk and other dairy products.
Plant-based foods also provide the body with a source of protein (such as beans, lentils and pulses) but you need to have a good mixture to provide the range of proteins you need.