Yes. Depending on what aspects of him or her you wish to study,
you may need psychology, biology, medicine.
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Searching for dietician jobs on CareerBuilder.com provides
multiple dietician job openings that are easy to apply to and pay
well. The website DietitianCentral.com is also a good go-to website
to search for dietician jobs since the only jobs they offer are
dietician jobs.
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statistician
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It's compulsory so yes, but to be a dietician it's not going to
help.