Why Sourdough Bread Stays Fresh Longer Than Regular White Loaves
Natural pH Defense Against Mold Growth Natural pH Defense Against Mold Growth (image credits: wikimedia) The secret behind sourdough’s impressive shelf life lies in its natural acidity. Sourdough breads contain organic acids including lactic acid (typically 15-50 mmol/kg) and acetic acid (typically 5-30 mmol/kg), creating an inhospitable environment for harmful microorganisms. This acidic environment forms a protective barrier that regular white bread simply cannot match. The lactic acid bacteria in sourdough naturally lower the bread’s pH to around 4.0, compared to regular bread which typically sits between pH 5.3-6.0. Many microorganisms flourish in neutral to slightly acidic conditions, while adjusting … Read more







