Proteolysis is the breakdown of proteins into smaller peptides and amino acids. In studied sourdough systems, low pH can activate cereal enzymes that contribute importantly to gluten breakdown.
Why bakers notice it
Protein changes affect dough behavior. More breakdown is not always useful: dough can become less able to retain gas. Texture depends on the flour and overall process rather than a rule that longer fermentation always improves structure.
What cannot be concluded
Protein fragments can participate in later flavor-forming processes. This does not establish that ordinary sourdough lowers blood pressure, inflammation or gluten-related risk. Specialized laboratory methods must not be equated with a home starter.
Read alongside the bake record
If dough loses strength, note the flour, temperature, timing and handling rather than diagnosing enzyme activity by appearance alone. For practical decisions, use the sticky-dough guide. Ordinary wheat sourdough is not gluten-free.
Sources & scope
- Gluten hydrolysis and depolymerization during sourdough fermentation
- Eating, Diet, & Nutrition for Celiac Disease
Source-based explanation and editorial checklists by SourdoughStart, operated by Tag Ad Limited. AI-assisted article revised 2026-10-12. Source links are not endorsements.
Revision note: prepared for the new reference-led edition. Suggest a correction.