Here are some studies about vitamin D and inflammatory bowel disease:

Paediatric IBD Patients Do Not Meet the Daily Recommendations of Vitamin D and Calcium Intake: Survey Based Analysis in a Tertiary Centre (2017)

Conclusion: A survey of 151 pediatric inflammatory bowel disease patients found that 75% of the children had low vitamin D levels.


Treatment of Vitamin D Deficiency Due to Crohn’s Disease with Tanning Bed Ultraviolet B Radiation (2001)

Case Study: This crohn’s disease patient suffering from chronic vitamin D deficiency was prescribed to use a UVB tanning bed for 10 minutes three times per week. After only one month her vitamin D levels “increased by 357% from 7 to 32 ng/mL” and after six months of this she was cured of the musculoskeletal pains she was suffering.


1,25-Dihydroxycholecalciferol Prevents and Ameliorates Symptoms of Experimental Murine Inflammatory Bowel Disease (2000)

Conclusion: In an experiment involving infant mice, engineered vitamin D deficiency was found to be deadly for the pups. Dissection revealed that one fatal vitamin D-deficiency symptom was severe inflammatory bowel disease, which induced diarrhea in the pups. The vitamin D-deficient pups were also growth retarded compared to vitamin D-sufficient mice.


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