Dietary Reference Intakes (DRIs) are the official U.S. guidelines for daily nutrient needs. They replaced the older Recommended Dietary Allowances (RDAs) and were set by the Institute of Medicine between 1997 and 2001. The goal is to provide amounts that meet the needs of 97–98% of healthy people in each age and gender group.

Functional medicine is a patient-centered approach to healthcare that focuses on identifying and addressing the root causes of disease.