サワードウパンは血糖値の上昇を抑える？
Nutrition & Health
Sourdough bread may produce a lower after-meal blood-sugar rise in some situations, especially compared with industrial bread or glucose. However, research is mixed: one study found no difference between whole-meal breads, while another found sourdough higher than several whole-grain breads. It is not established that sourdough always gives a lower blood-sugar response.
A systematic review of 18 clinical trials reported lower blood glucose at 60 and 120 minutes after sourdough than after comparison bread or glucose, but rated the evidence low to very low. Individual studies differed depending on the bread recipe, comparison bread, serving method, and participants. The strongest practical takeaway is that the flour and overall bread composition may matter as much as, or more than, the sourdough process itself.
What this answer does not cover
- This synthesis uses titles and abstracts, not a full-text systematic review.
- Bibliographic index coverage and metadata can be incomplete or delayed.
- Retraction and publication-status metadata can be incomplete across connected indexes.
- Paper quality and risk of bias were not independently assessed.
- This assessment is based on titles and abstracts rather than full-text review.
- The studies used different breads, comparison foods, serving amounts, participants, and blood-sugar measures, so results may not apply to every sourdough loaf.
- The systematic review reported low to very low certainty of evidence.
- Several supplied studies examined other bread characteristics rather than sourdough specifically and therefore provide limited direct evidence for this question.
Papers used (7)
- The acute impact of ingestion of sourdough and whole-grain breads on blood glucose, insulin, and incretins in overweight and obese men. — Journal of nutrition and metabolism, 2012
- Effect of whole meal yeast-leavened, sourdough-leavened and yeast-sourdough-leavened bread consumption on appetite, energy intake, and postprandial metabolic responses: A randomized, blinded, cross-over study. — Appetite, 2026
- Consumption of sourdough bread and changes in the glycemic control and satiety: A systematic review — Critical Reviews in Food Science and Nutrition, 2022
- Variations in Postprandial Blood Glucose Responses and Satiety after Intake of Three Types of Bread — Journal of Nutrition and Metabolism, 2011
- Do the Types of Dietary Carbohydrate and Protein Affect Postprandial Glycemia in Type 1 Diabetes? — Nutrients, 2025
- High-amylose barley bread improves postprandial glycemia compared to regular barley and wheat bread in subjects with or without type 2 diabetes — European Journal of Clinical Nutrition, 2025
- The acute impact of ingestion of breads of varying composition on blood glucose, insulin and incretins following first and second meals — British Journal Of Nutrition, 2008
Answer last checked 2026-10-13T07:44:35.088Z. Answerlog reads titles and abstracts, not full papers, and does not assess study quality or claim consensus.
More questions about Nutrition & Health
All cooking and baking questions