Unhealthy diets and physical inactivity are major risk factors for chronic diseases. Reports of international and national experts and reviews of the current scientific evidence recommend goals for nutrient intake in order to prevent chronic diseases.
For diet, recommendations for populations and individuals should include the following:
achieve energy balance and a healthy weight
limit energy intake from total fats and shift fat consumption away from saturated fats to unsaturated fats and towards the elimination of trans-fatty acids
increase consumption of fruits and vegetables, and legumes, whole grains and nuts
limit the intake of free sugars
limit salt (sodium) consumption from all sources and ensure that salt is iodized
Excerpt taken from World Health Organisation – http://www.who.int/dietphysicalactivity/diet/en/