Macro-Nutrients
Macro-nutrients are present in far greater quantities than micro-nutrients in all foods. They make up the bulk of the food that we eat. Macro-nutrients are catagorised in one of three ways: proteins, carbohydrates and fats.
Proteins
Protein is essential for growth and repair of body tissue and is present in part of every living cell.
Proteins are made up of amino acids, of which there are 8 essential and 12 non-essential amino acids.
The body is able to produce the non-essential amino acids, whereas the essential amino acids must be obtained through diet. The essential amino acids are all found in animal products such as meat and dairy, but are also all found is soybean products. They can also be obtained by combining beans, peas and nuts into your diet (if you are a vegetarian).
The
body requires between 0.75g to 1.5g of protein per kilogram of body weight
depending on an individuals level of activity, or approximately 25% to 30%
of total calorie intake (where 1g protein is approximately 4 calories).
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Some sources of protein are as follows:
Meat, poultry, fish, milk, cheese, yoghurt, soybean products, peanuts, lentils, etc.
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