PDCAAS to DIAAS — For a More Accurate Amino Acid Score

PDCAAS stands for Protein Digestibility Corrected Amino Acid Score and has been the recommended measure of protein quality by the FAO/WHO since 1989. In calculating this score, the goal is to asses how well dietary protein is able to match the demand for amino acids so that protein can be effectively utilized. As the world population continues to grow at an exponential rate, the need to find the accurate amount and quality of protein required for human health is more important than ever.

This method of measuring protein has been the trusted method for over twenty years, but recently questions have been raised among academia about the accuracy of the score. Recent research has determined that contrary to the PDCAAS, dietary amino acids need to be treated as individual nutrients and data needs to be given on an individual amino acid basis when calculated. The FAO recommends a revised score called the Digestible Indispensable Amino Acid Score (DIAAS) to address the individual dietary amino acid digestibility.

Uses of the DIAAS include:

  • Calculation of DIAAS in mixed diets since humans consume proteins from many different sources.
  • To document the added benefit of individual protein sources.
  • To classify and monitor the protein adequacy of foods and food products.

The DIAAS assesses protein quality based on true ileal digestibility values of individual amino acids versus the overall digestibility of protein. In layman’s terms, the DIAAS is a new, more accurate method of measuring protein quality and the individual source of that protein. The DIAAS is important for finding the healthy and sustainable amount of protein needed for human consumption as our world continues to grow. Read the full report here.

Disclaimer: LENTEINTM has assembled this information in good faith and tries to present everything as accurately and objectively as possible.