How many and what food do we need?
Age, sex, weight, height, and level of activity determine the number of calories a person needs each day. The recommended daily caloric intake for a child aged 11 to 14 can range from 1,600 to 2,600 calories per day. For adults, this can range from 1,800 to about 3,000.
A healthy diet contains a balanced mix of different foods that together provide all essential nutrients.
A
food pyramid is a diagram of a healthy diet that shows the number of servings of each food group a person should eat every day.
Malnutrition is the lack of a balanced diet. Too few or too many nutrients, or an imbalance of nutrients (too many carbohydrates, for instance, and not enough fruits and vegetables) can lead to malnutrition.
Undernutrition is a form of malnutrition. Usually linked to hunger, it happens when the body does not get enough food to meet its needs. It can cause many diseases and even lead to death, which is called
starvation in this context.
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