The Claim
Thermal processing that induces nonenzymatic browning reduces protein digestibility through covalent cross-linking, carbonyl formation, and oxidation of lysine and cysteine residues, which impairs protease access and decreases amino acid bioavailability.
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.
Heating food causes chemical changes in proteins that make them harder to break down during digestion, reducing the amount of amino acids the body can absorb.
See the scientific wording
Thermal processing that induces nonenzymatic browning reduces protein digestibility through covalent cross-linking, carbonyl formation, and oxidation of lysine and cysteine residues, which impairs protease access and decreases amino acid bioavailability, as shown in vitro and in animal models.
When food is heated, sugars and proteins react to form stiff bonds that glue protein strands together and damage key amino acids, making it impossible for digestive enzymes to cut the protein into pieces, so the body cannot absorb the amino acids it needs.
What the research says
1 studyWhen food is roasted or fried and turns brown, chemical changes happen that make it harder for your body to break down and absorb the proteins, just like the claim says.
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.