Dietetics is the science of human nutrition and the management of diet. It involves studying how food and nutrition affect human health, often as part of the treatment of various health conditions. Dietitians are experts in dietetics; they advise individuals on dietary practices to promote health or manage specific health conditions.

Dietetics integrates knowledge from biochemistry, physiology, and food science to understand how nutrients and dietary components influence the health and wellbeing of individuals and communities. The field is continually evolving with research, contributing to public health policies, nutritional guidelines, and therapeutic diets.