A-level Biology/Human Health and Disease/diet  From Wikibooks,
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Dietary Reference Values[edit]  Dietary reference values are
just that - they are values that can help you plan your diet and
ensure you are receiving everything you need in the right
proportions. Dietary reference values are calculated for the
following dietary components;    • Estimated average requirement
(energy/nutrients) - this is an estimate of the average
requirements of a population   • Reference nutrient intake -
enough or more for nearly all the population   • Low reference
nutrient intake - sufficient for those with low needs.   Dietary
reference values are used by people cooking for large groups of
people - school caterers, hospitals and prisons for example.
However, people suffering from disease will require different
diets, so it is important to remember that a dietary reference
value is an average, and so applies to groups and not
individuals.   Circumstances affect how much