Dietitian / nutritionist

A dietitian or nutritionist advises people on food and eating to improve health and manage disease. They assess clients' nutritional needs and medical conditions, design eating plans, counsel on changes for issues like diabetes, heart disease, or weight, and in clinical settings manage the nutrition of hospitalized patients, including tube and IV feeding.

Registered dietitians hold credentials that let them provide medical nutrition therapy, working in hospitals, clinics, community programs, and private practice. The role blends science with behavior-change counseling, since knowing what's healthy matters less than helping people actually change how they eat, and it suits people drawn to preventive, education-focused healthcare.