A nutritionist is a medical specialist whose job is to advise patients regarding the impacts of food and nutrition on their overall health. They are also known as nutrition scientists, dietitians, clinical nutritionists, sports nutritionists, community nutritionists, or public health nutritionists, depending on their location and work setting. They can also work as independent entrepreneurs offering their services in hospitals, schools, and other settings and environments. The role of nutritionists is growing more significant as the obesity rate continues to reach record highs.
In general, nutritionists provide evidence-based information and guidance about the impacts of food and nutrition on the health and wellbeing of humans (at an individual or population level) or animals. It is important that nutritionists have a good understanding of the scientific basis of nutrition.
Registered Associate Nutritionists (ANutrs) are individuals with a minimum of honours-degree level knowledge and understanding of nutrition science. They are qualified and competent to provide evidence-based information.
Registered Nutritionists (RNutrs) additionally have a number of years professional practice experience and have demonstrated they are both qualified and competent in the application of nutrition science within their specialist area.
Source: associationfornutrition.org, docdoc.com