PDCAAS Protein Quality Calculator
Compute the Protein Digestibility-Corrected Amino Acid Score (PDCAAS) from the limiting amino acid score and true digestibility.
How to Use the PDCAAS Protein Quality Calculator
- Enter the amino acid score (0–1, with 1 meeting all requirements).
- Enter true digestibility (0–1).
- Click Calculate.
Casos de Uso
- •Food-science coursework.
- •Formulating plant-based protein blends.
- •Labelling and regulatory review.
Fórmula
PDCAAS = min(1, amino_acid_score × digestibility). Both inputs are 0 to 1 fractions; outputs are capped at 1.00.
Perguntas Frequentes
Why the cap at 1.0?
PDCAAS is truncated at 1.0 because additional amino acids beyond the requirement cannot improve biological quality in the regulatory framework.
Which proteins score 1.0?
Whey, casein, egg white, soy isolate and beef all reach the 1.0 ceiling. Wheat gluten scores about 0.25 (limited by lysine).
Medical disclaimer
Educational only. Not a substitute for clinical or regulatory nutrition judgment — PDCAAS is now being replaced by DIAAS in newer FAO guidance.