The Claim
In an in vitro simulated gastrointestinal model, pork sausage has a Digestible Indispensable Amino Acid Score (DIAAS) of 116% with leucine as the limiting amino acid, soy sausage has a DIAAS of 86% limited by sulfur-containing amino acids, and wheat-based sausages have DIAAS values of 33% and 41% due to lysine deficiency.
What the research says
Roughly balanced
Support and challenge are close. The picture may shift as more studies come in.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In laboratory tests simulating human digestion, pork sausage provided the highest protein quality score among the tested sausages, followed by soy sausage, while wheat-based sausages had significantly lower protein quality scores due to insufficient lysine.
See the scientific wording
In an in vitro simulated gastrointestinal model, pork sausage demonstrated a Digestible Indispensable Amino Acid Score (DIAAS) of 116%, indicating high-quality protein with leucine as the limiting amino acid, while soy sausage had a DIAAS of 86% limited by sulfur-containing amino acids, and wheat-based sausages showed significantly lower DIAAS values of 33% and 41% due to lysine deficiency.
When food is broken down in the gut, some proteins release more usable amino acids than others. Pork protein breaks down easily and releases all essential amino acids in high amounts, making it the most nutritious. Soy protein releases most amino acids but not enough sulfur-containing ones like methionine. Wheat protein barely releases lysine because it gets trapped in its structure, so it provides very little of this essential nutrient.
What the research says
1 studyIn a lab test that mimics human digestion, pork sausage had the best protein score, soy sausage was good but not as good, and wheat sausages were much worse because they didn’t have enough of a key nutrient called lysine.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.