Posted on: January 7, 2016 at 2:31 pm
Last updated: September 30, 2016 at 2:02 pm

Irritable bowel syndrome (IBS) is characterized by digestive tract malfunction, including diarrhea, constipation, bloating, abdominal cramps, nausea, and gas. The condition is estimated to affect 20% to 30% of the American population.


Root causes associated with IBS include stress, a diet high in refined sugars, low in fiber, food sensitivities or allergies, candida overgrowth, dysbiosis, or parasite infections. A new study published in the BMJ (British Medical Journal) Open Gastroenterology has also found that IBS is linked with low levels of vitamin D.

In a study conducted by researchers at the University of Sheffield in the U.K., 82% of the 51 IBS patients tested had inadequate vitamin D levels. For the study, the participants were randomly given a placebo tablet, vitamin D supplements, or a combination of probiotics and vitamin D for a 12-week period.


The low vitamin D status also affected the IBS sufferer’s perception of quality of life, which was measured by the extent the person had reported IBS would impact their life.

“Clinicians and patients currently have to work together and use trial and error to manage the condition and this may take years with no guarantee of success,” explained lead study author Dr. Bernard Corfe. “Our work has shown that most IBS sufferers in our trial had insufficient levels of vitamin D.”

IBS is thought to account for 10% of general practitioner visits, and it can lead to hospital appointments and lost workdays. One of the study researchers, Vicky Grant, has suffered from IBS for over 30 years and has found other treatments ineffective. After taking a high dose of vitamin D3 (cholecalciferol) supplementation every day for five years, Grant reported significant symptom reduction.

The research team plans to conduct larger clinical trials. They suggest that people with IBS should consult their doctor about possible low vitamin D levels. Vitamin D testing and vitamin D supplementation may go a long way in the treatment of IBS.


“Our data provide a potential new insight into the condition and importantly a new way to try to manage it,” added Dr. Corfe. “As a result of this exploratory study, we’re now able to design and justify a larger and more definitive clinical trials.”

Vitamin D3 supplementation can benefit other conditions, including depression, obese or overweight individuals, bone conditions, chronic fatigue, high blood pressure, heart disease, kidney disease, and other gut conditions such as celiac disease, Crohn’s disease, and inflammatory bowel disease. Natural vitamin D3 is also obtained from sunlight and some foods like eggs, cod, shrimp, and sardines.

Besides vitamin D3, other effective supplementation for IBS includes peppermint oil, gentian root, digestive enzymes, ginger root, aloe vera juice, diamine oxidase (DAO) enzyme, pau d’arco, slippery elm, skullcap, betaine HCl (hydrochloric acid), and a high-quality probiotic. People may also benefit from probiotic foods such as kefir, kimchi, sauerkraut, or kombucha.

This article was republished with permission from

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