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A new population-based study from China has found that a higher intake of B vitamins is associated with a reduced risk of constipation, offering fresh insights into dietary approaches for managing this common digestive issue.
Researchers analyzed data from the National Health and Nutrition Examination Survey (NHANES) collected between 2005 and 2010, involving 13,885 adults aged 20 and above. Of these, 1,043 participants were classified as having constipation according to the Bristol Stool Form Scale. Dietary intake was assessed using a 24-hour recall interview, and participants also completed a Bowel Health Questionnaire.
The study revealed a non-linear inverse correlation between the intake of all examined B vitamins—including B1, B2, niacin, B6, folate, choline, and B12—and the risk of constipation. Notably, those in the highest intake quartiles for niacin, folate, and choline experienced a significant reduction in constipation risk, even after adjusting for multiple confounding factors1. Subgroup analysis showed that alcohol consumption could modify the relationship between certain B vitamins and constipation, suggesting that lifestyle factors may influence these effects.
B vitamins, found abundantly in vegetables, grains, legumes, nuts, meat, and eggs, are essential for various metabolic processes and play a key role in intestinal health. They support the growth and maintenance of intestinal cells, regulate the enteric nervous system, modulate gut microbiota, and help maintain immune homeostasis. The study suggests that increasing B vitamin intake may indirectly reduce constipation risk by improving overall dietary quality, as individuals with higher Healthy Eating Index scores—reflecting greater consumption of fiber- and water-rich foods—tend to have lower rates of constipation.
The researchers highlighted that while the study adjusted for many confounders, factors such as gut microbiota composition, medication use, and certain medical conditions were not fully accounted for. They recommend future clinical trials to evaluate the therapeutic efficacy of B vitamin supplementation and to clarify the mechanisms by which these vitamins influence gut motility1.
“Increased dietary intake of B vitamins may contribute to a reduced risk of constipation, particularly among specific population subgroups. These results offer a scientific foundation for the potential application of B vitamins in constipation management,” the researchers stated.
Disclaimer
This article summarizes findings from observational research and should not be interpreted as medical advice. The study shows an association, not causation, and further clinical trials are needed to confirm these results. Individuals considering dietary changes or supplementation should consult a healthcare professional for personalized guidance.
