What Is the RDA?
The Recommended Dietary Allowance (RDA) is the average daily intake of a nutrient sufficient to meet the needs of nearly all healthy people (about 97%–98%) in a specific age and sex group, as set by the US National Academies. For protein, the adult RDA is 0.8 grams per kilogram of body weight per day.
RDA and DRIs
The RDA is one of the Dietary Reference Intakes (DRIs), which also include Adequate Intake and Tolerable Upper Intake Levels.
A Minimum, Not an Optimum
The RDA describes a level that prevents deficiency in most people; needs can differ for athletes, pregnant people, and older adults.
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🔗 Related Terms
More Health & Fitness Terms
- Basal Metabolic Rate (BMR)
- Body Composition
- Body Fat Percentage
- Body Mass Index (BMI)
- Calorie
- Calorie Deficit
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Last updated: September 27, 2026. This definition is for general educational purposes only. It is not financial, investment, tax, legal, or medical advice, and it does not recommend any product or course of action. For decisions about your own situation, consult a qualified professional.