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A nutritionist is a health specialist who devotes professional activity to food and nutritional science, preventive nutrition, diseases related to nutrient deficiencies, and the use of nutrient manipulation to enhance the clinical response to human diseases.

They may also advise people on dietary matters relating to health, well-being and optimal nutrition. Nutritionists have varying levels of education from someone with little or no education to an individual who has obtained a bachelor's, master's, or doctoral degree. This is because the term "nutritionist" is not a legally protected term in most parts of the world. As a result, the term "nutritionist" is subject to several interpretations. Many nutritionists appear on television, in newspapers and magazines, and write nutritional books, which may or may not have any real informational value regarding diet.

Training
There are a wide range of courses available which vary in duration from several days to several years. A person who represents him or herself as a nutritionist may have several different levels of education including a degree in nutrition or dietetics from a university (of which several may be accredited by nutritionist governing bodies such as the Nutrition Society accrediting degree courses in the UK) or certification in nutrition education and/or counseling from a private vocational/professional training school.

2008-03-12 20:20:49 補充：
Types of Nutritionist

1. Nutrition Scientists

2. Public Health Nutritionists