fine crop of rice by shop boy on flickr
Did you know that per 100g, carbohydrates and proteins contain similar amounts of energy whereas fats contain more than double that? Actual figures are: 1760 kJ for carbohydrates, 1720 kJ for protein and 4000 kJ for fats (per 100g).
Differences exist between various ethnic groups in terms of their main dietary source of energy. Your task will be to research different ethnic groups that use rice, wheat, cassava, maize, fish and meat as their staple energy source, and to compare their diets.
MSG by PunkJr on flickr
In addition, we will consider that there are social issues relating to inappropriate diets, especially in the developed world. There is also highly effective marketing of unhealthy foods by profit-making companies (I saw a TV ad recently espousing the benefits of MSG!). With this in mind, you must be able to explain the possible health consequences of diets rich in carbohydrates, fats and proteins. [Consequences of an excess of each type of nutrient should be explained separately.]
What makes us stop eating? We have an appetite control centre in the brain. Do some research and find out how it works.