Protein is needed for growth and repair of the body.
It is also an energy source. 1g of protein provides 4 k cal.
Different foods contain different amounts and combinations of amino acids. (the building blocks of protein)
The amount of protein we need changes throughout our lifetimes.
The main sources include meat, fish, eggs, milk, cheese, cereals and cereal products (e.g. bread) nuts, pulses (peas, beans, lentils)
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