Can barley cause constipation?

Does Barley Cause Constipation?

No, barley does not cause constipation. In fact, barley is beneficial for bowel function and can help prevent or alleviate constipation due to its high fiber content.

Barley's Effect on Bowel Function

Barley is a whole grain that contains significant amounts of dietary fiber, which contributes positively to digestive health in several ways:

• Barley contains fiber that contributes to an increase in fecal bulk 1
• The European Union has authorized health claims that "barley grain fiber contributes to an increase in faecal bulk" 1
• Barley is rich in β-glucans, a type of soluble fiber with multiple health benefits 2

Scientific Evidence Supporting Barley's Laxative Effects

Multiple studies demonstrate barley's positive effects on bowel movements:

• A randomized double-blind study found that waxy barley consumption increased defecation days, defecation frequency, and stool amount in young Japanese women 3
• A 5-month study in elderly nursing home residents showed that waxy barley (Kirarimochi) significantly increased monthly defecation frequency and reduced laxative use in constipated subjects 4
• Animal studies have demonstrated that germinated barley foodstuff (GBF) improves constipation in rats, increasing bowel movements and fecal water content 5
• Triple fermented barley extract has shown promising laxative properties in animal models of constipation 6

How Barley Helps Prevent Constipation

Barley works through several mechanisms to promote healthy bowel function:

1. Increased Fecal Bulk: The fiber in barley increases fecal weight, which stimulates peristalsis and facilitates passage through the intestines 1

2. Short-Chain Fatty Acid Production: Barley fiber fermentation in the colon produces short-chain fatty acids, especially butyrate, which may help normalize bowel function 5

3. Water Retention: Soluble fiber in barley absorbs water in the digestive tract, softening stools and making them easier to pass 1

4. Prebiotic Effects: Barley has prebiotic effects that positively influence gut microbiota, which may contribute to improved bowel function 7

Clinical Applications

For individuals concerned about constipation:

• Incorporating barley into the diet can be beneficial for preventing and managing constipation 4
• High-β-glucan barley varieties may be particularly effective, though standard barley varieties also show benefits 3
• Barley consumption has shown benefits even at intake levels below the target of 3g/day of β-glucan 3

Important Considerations

• While barley is generally beneficial for bowel function, individual responses may vary
• Adequate fluid intake should accompany increased barley consumption to maximize its benefits
• Barley contains gluten and is not suitable for individuals with celiac disease or gluten sensitivity
• The beneficial effects of barley on constipation appear to be more pronounced in individuals who already have constipation issues 4

Barley's high fiber content and beneficial effects on gut health make it a valuable addition to the diet for maintaining regular bowel function and preventing constipation.