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Related Experiment Video

Updated: Jan 27, 2026

Creating and Applying a Reference to Facilitate the Discussion and Classification of Proteins in a Diverse Group
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Revised Reference Values for the Intake of Protein.

Margrit Richter1, Kurt Baerlocher2, Jürgen M Bauer3

  • 1German Nutrition Society, Bonn, Germany, richter@dge.de.

Annals of Nutrition & Metabolism
|March 25, 2019
PubMed
Summary
This summary is machine-generated.

The D-A-CH nutrition societies updated protein intake reference values in 2017. A higher protein intake is recommended for adults over 65, based on new scientific data.

Keywords:
ElderlyIndispensable amino acidsProteinProtein requirementReference value

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Area of Science:

  • Nutrition Science
  • Public Health

Background:

  • The nutrition societies of Germany, Austria, and Switzerland (D-A-CH) revised protein intake reference values in 2017.
  • A structured literature search (2000-2017) informed the update process.

Purpose of the Study:

  • To revise and establish updated reference values for protein intake.
  • To incorporate recent scientific findings into dietary guidelines.

Main Methods:

  • Literature review of studies published between 2000 and 2017.
  • Factorial method for calculating requirements in infants, children, adolescents, pregnant, and lactating women.
  • Nitrogen balance studies for adults and consideration of metabolic/functional parameters for seniors.

Main Results:

  • Reference values for protein intake (g/kg body weight/day) were established for various age groups: infants (<4 months): 2.5-1.4, children: 1.3-0.8, adults (<65 years): 0.8, adults (>65 years): 1.0.
  • Values for infants, children, adolescents, and adults under 65 remained largely unchanged.
  • A higher reference value for protein intake was set for adults over 65 years.

Conclusions:

  • Updated protein reference values reflect the latest scientific evidence.
  • The increased protein recommendation for older adults may necessitate adjustments in food-based nutrition strategies.
  • These revised guidelines support evidence-based nutritional practices across different life stages.