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Nutrition

Protein

Proteins are present in the muscle, skin, hair and every other body part or tissue. Protein is required in the body for building and repairing tissue, for making enzymes that assist with many of the chemical reactions in the body, and for the production of haemoglobin which carries oxygen in the blood.

When choosing foods that are good sources of protein it is important to consider not only the amount of protein the food provides but also the quality of the protein present.

There are two types of proteins – incomplete and complete. ‘Complete’ proteins contain all the amino acids required to build new protein. Animal foods are considered to be complete proteins and some examples of good protein sources are meat, seafood, chicken, eggs, milk and milk products. However, plant foods such as legumes, cereals and nuts are considered to contain ‘incomplete’ protein. This means that a wide variety of plant foods required to ensure that vegetarians receive all the amino acids required in the body for building protein.

When choosing foods as a protein source, we need to be aware of the other components present in the food. Often high-protein foods are also high-fat foods, especially meat sources of protein. Choosing foods from both plant and animal sources should give a high protein intake without dramatically increasing fat intake.

  • Protein in the diet is provided by a wide range of available foods, including lean meat, chicken and seafood, eggs and milk.
  • Bread is also an important source.
  • Choose low and reduced fat options from meat and milk food groups where possible.
  • If vegetarian, include protein from diverse plant sources, such as breads, cereals, legumes, and nuts.
  • If lacto-ovo-vegetarian make sure eggs and milk products are included in the diet.

Bread is an important source of protein in the New Zealand diet, providing 11% of the total protein in our diet. On average, protein present in bread ranges from about 8-15 g protein per 100 g bread dependent on the type of bread. Because bread is a cereal source of protein, it is important to combine bread with animal proteins, for example cheese or milk, to ensure that you are consuming a good source of complete protein and thus you are receiving all the amino acids required to build protein in the body.