Normal and Therapeutic Nutrition

Normal and Therapeutic Nutrition 3(2+1)

Lesson 8:Recommended Dietary Allowances (RDA)

Deriving RDA

• Dietary intake of healthy individuals
• Growth – during infancy
  Nutrition balance studies. Intake = Output .
• Calcium, phosphorus - Intake = Output
• Obligatory/endogenous losses. eg: protein
• Factorial methods : iron, energy
• Depletion – repletion studies :water soluble vitamins

One or more methods are used for deriving RDA.