1.5.1 Energy content
People need a certain minimum level of calories for sustainability. This
level will depend on gender, age and the intensity of physical activity. People
will demand at least that amount of energy they need for their survival. In
developed countries there is also an upper level of calories that weightconscious
consumers will not want to exceed. That is what justifies the plethora
of low calorie food products in European and US markets.