Nutrition is the study of the relationship between food and drink and states of health and disease. fix this sentence....especially to determining an optimal diet for purposes of health, weight loss[?], body building, or other purposes. It is practiced by nutritionists. Need some discussion of role of a dietician.
Additionally, several diseases directly or indirectly are impacted by diet, or require very close attention to diet. These include
Current dietary guidelines in the United States are presented in the concept of a food pyramid. Detailed information on general nutrition is available at the Department of Agriculture's Food and Nutrition Information Center, at http://www.nal.usda.gov/fnic/.
Some concepts in nutrition include these need to be filled out
Controversies in modern nutrition include: