Nutrition and teenagersNutrient needs during adolescence are higher than at any other time in the lifecycle, and failure to consume a healthy balanced diet during this time can have adverse affects on young people's well-being, energy and health. In addition to the impact on growth and development, a poor diet during this lifestage can cause a number of immediate health problems such as iron deficiency anaemia, obesity, diabetes and dental caries in the short-term.