protein-quality
Protein quality refers to how well a protein source supplies essential amino acids in forms the human body can digest and use, typically assessed using metrics like the Protein Digestibility Corrected Amino Acid Score (PDCAAS). In plant science, improving protein quality is a critical research goal because most plant proteins are deficient in one or more essential amino acids and have lower digestibility compared to animal proteins. Researchers work to breed or engineer crops with enhanced amino acid profiles and bioavailability, making plant-based foods more nutritionally complete for global populations relying on them as primary protein sources.
open_in_new WikipediaPubMed · 2026-05-04
A review of existing research finds that plant-based proteins can adequately support older adults' nutritional needs, with no significant disadvantage compared to animal proteins for muscle maintenance and appetite — suggesting plant-forward diets can work for aging populations without sacrificing health outcomes.
No significant differences were found between plant-based and animal-based diets in outcomes including appetite, nutritional status, and long-term muscle protein synthesis in older adults.
Plant protein supplementation showed measurable improvements in nutritional status and muscle protein synthesis compared to before supplementation or lower protein intakes.
Key factors influencing plant protein effectiveness include the specific protein source, the food matrix (how it's prepared and combined), and the presence of other nutrients — not all plant proteins are equal.