Dietitians need knowledge in the following areas:

• Biology: Cells, plants, and animals and how they function.
• Medicine and Dentistry: Injuries and illnesses and plans for treatment.
• English Language: The meaning and use of the English language.
• Therapy and Counseling: The mental or physical problems and methods for treatment.
• Customer and Personal Service: Providing special services to customers based on their needs.
• Psychology: People, their actions, and mental processes and how to treat problems.
• Education and Training: The methods of teaching and learning.
• Mathematics: The rules and uses of numbers.
• Computers and Electronics: Computer hardware and software.
• Chemistry: The properties of substances and the changes that occur when they interact.
• Sociology and Anthropology: Where people come from and how they behave.
• Food Production: The methods for planting, growing, and harvesting food.