A common natural compound found in rice bran may one day help scientists develop new treatments for digestive disorders.
Researchers from Toho University discovered that ferulic acid can reduce the strength of intestinal muscle contractions by affecting the way calcium enters muscle cells.
Their findings offer a new perspective on how everyday food components may influence digestive health.
The study focused on ferulic acid, a polyphenol naturally present in whole grains and many fruits and vegetables.
Previous research has mainly examined its antioxidant and protective effects throughout the body. This new work investigated whether it also changes the movement of the intestines.
Healthy digestion depends on coordinated muscle contractions that push food through the digestive tract. In disorders such as irritable bowel syndrome and inflammatory bowel disease, this movement can become abnormal, causing symptoms including pain, diarrhea or constipation.
Using guinea pig intestinal tissue, the scientists found that ferulic acid consistently weakened contractions caused by several different digestive signaling chemicals. Because the compound acted on many pathways at once, the researchers suspected it was targeting a shared mechanism rather than individual receptors.
Additional experiments confirmed that ferulic acid reduced calcium signals inside smooth muscle cells. Since calcium is essential for muscle contraction, blocking part of this process allowed the muscles to relax more easily. This explains how the compound reduced intestinal activity.
The researchers believe this effect might eventually benefit people whose intestines contract too strongly. On the other hand, they warn that people with slow bowel movement or constipation might not benefit because reducing contractions further could aggravate their symptoms.
Although the findings are encouraging, the scientists emphasize that laboratory results cannot yet be applied directly to people. More research and carefully designed clinical trials will be needed to determine safe doses, identify who could benefit most and understand whether ordinary diets provide enough ferulic acid to produce meaningful effects.
Review and analysis: The research highlights the growing interest in using natural food compounds to influence digestive health.
While much more evidence is needed before ferulic acid can be recommended as a treatment, the study identifies a clear biological pathway that could inspire future therapies and nutrition-based interventions.
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Source: Toho University.
