Limiting does not mean absent
Researchers measured composition across 30 commercial hemp samples, including whole seeds, meal and dehulled seeds. Lysine was the first limiting amino acid in the tested products relative to the study’s reference pattern. [1]
That means its proportion constrained the score; it does not mean the products contained no lysine or were useless sources of protein. [1]
The quality score depends on what was measured
The study used a rat bioassay for digestibility and the FAO/WHO amino acid requirement pattern for children aged 2 to 5 years when calculating PDCAAS in subsets of products. Dehulling changed the resulting digestibility and quality measurements. [1]
These are study-specific food-quality data, not a human muscle-growth trial or a universal score for every hemp powder. Compare the actual preparation and overall dietary amino acid supply. [1]
Ask for more than a yes-or-no completeness label
Imagine two products both contain all essential amino acids. Different proportions and digestibility can still make their protein-quality scores differ.
| Detail | Interpretation |
|---|---|
| Lysine limitation | Relative proportion, not absence |
| Preparation | Can change measured quality |
| Complete label | Does not replace composition and digestibility |
Sources for this article
- Evaluating the quality of protein from hemp seed (Cannabis sativa L.) products through the use of the protein digestibility-corrected amino acid score method - PubMed
Source consulted: 2026-09-18. This is a reference resource, not a claim that we conducted the studies or tested a product.