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Measurement of vitamin D levels in inflammatory bowel disease patients reveals a subset of Crohn's disease patients with elevated 1,25-dihydroxyvitamin D and low bone mineral density. Abreu MT, Kantorovich V, Vasiliauskas EA, Gruntmanis U, Matuk R, Daigle K, Chen S, Zehnder D, Lin YC, Yang H, Hewison M, Adams JS. Gut. 2004 Aug;53(8):1129-36. PMID: 15247180 doi: 10.1136/gut.2003.036657. Conclusions: These data demonstrate that elevated 1,25(OH)2D is more common in CD than previously appreciated and is independently associated with low bone mineral density. The source of the active vitamin D may be the inflamed intestine. Treatment of the underlying inflammation may improve metabolic bone disease in this subgroup of patients.

Vitamin D receptor gene polymorphism: association with Crohn's disease susceptibility.\nSimmons JD, Mullighan C, Welsh KI, Jewell DP.\nGut. 2000 Aug;47(2):211-4.\nPMID: 10896912 \ndoi:10.1136/gut.47.2.211

This is a very long newsletter. I will answer questions about oil versus water-soluble Vitamin D, depression, mental clarity, malignant melanoma, Crohn's disease, an imagist poet, multiple sclerosis, sun-exposure, high-intensity red light and collagen repair in the skin, non-alcoholic fatty liver disease, influenza, the 1918 influenza pandemic, statins, the new Food and Nutrition Board, thyroid disease, chronic fatigue syndrome, athletes, the upcoming 14th Vitamin D Workshop, prostate cancer, the wrong blood test, pregnancy, autism, Alzheimer's disease, soap and sebum, asthma, sleep, the co-factors vitamin D needs to work (all contained in spinach), and-my favorite-UVC light and Vitamin D

[Low levels of 25-hydroxyvitamin D (25OHD) in patients with inflammatory bowel disease and its correlation with bone mineral density] Souza HN, Lora FL, Kulak CA, Mañas NC, Amarante HM, Borba VZ. Arq Bras Endocrinol Metabol. 2008 Jun;52(4):684-91. Portuguese. PMID: 18604382

Novel role of the vitamin D receptor in maintaining the integrity of the intestinal mucosal barrier. Kong J, Zhang Z, Musch MW, Ning G, Sun J, Hart J, Bissonnette M, Li YC. Am J Physiol Gastrointest Liver Physiol. 2008 Jan;294(1):G208-16. Epub 2007 Oct 25. PMID: 17962355 These observations suggest that VDR plays a critical role in mucosal barrier homeostasis by preserving the integrity of junction complexes and the healing capacity of the colonic epithelium. Therefore, vitamin D deficiency may compromise the mucosal barrier, leading to increased susceptibility to mucosal damage and increased risk of IBD.