Vitamin D

Hypercalcemia due to Hypervitaminosis D: Report of Seven Patients. Joshi R. J Trop Pediatr. 2009 Apr 1. [Epub ahead of print] PMID: 19339514

Pharmacokinetics of vitamin D toxicity. Jones G. Am J Clin Nutr. 2008 Aug;88(2):582S-586S. Review. PMID: 18689406

Vitamin D toxicity, policy, and science. Vieth R. J Bone Miner Res. 2007 Dec;22 Suppl 2:V64-8. Review. PMID: 18290725 doi: 10.1359/jbmr.07s221

Unusually prolonged vitamin D intoxication after discontinuation of vitamin D: possible role of primary hyperparathyroidism. Taskapan H, Vieth R, Oreopoulos DG. Int Urol Nephrol. 2008;40(3):801-5. Epub 2008 Jun 5. PMID: 18528779 DOI: 10.1007/s11255-008-9404-1

Vitamin D poisoning by table sugar. Vieth R, Pinto TR, Reen BS, Wong MM. Lancet. 2002 Feb 23;359(9307):672. PMID: 11879864 doi:10.1016/S0140-6736(02)07814-5

Vitamin D and cancer mini-symposium: the risk of additional vitamin D. Vieth R. Ann Epidemiol. 2009 Jul;19(7):441-5. Epub 2009 Apr 11. Review. PMID: 19364661 Conclusion The results of well-conducted trials of vitamin D lead to the conclusion that the current U.S. National Academy of Sciences-Institute of Medicine upper limit for vitamin D intake of 2000IU per day 1, 37 is excessively conservative. That intake would raise serum 25(OH)D by an average of about 50 nmol/L (20 ng/mL), well within the safe range of serum 25(OH)D concentrations that extends to 500 nmol/L (200 ng/mL). Intake of 4,000IU per day would raise serum 25(OH)D by an average of about 100 nmol/L (40 ng/mL). Even prolonged physiologic-replacement intake of 10,000IU per day of vitamin D3 would pose no known risk of adverse effects in virtually all adults.

Articles about vitamin D and cancer

San Diego, CA (PRWEB) May 25, 2009 -- Coming on the heels of the publishing in the Annals of Epidemiology of a new study led by Dr. Cedric Garland, on the preventive measures of vitamin D, GrassrootsHealth D*action Project is calling on physicians, health clinics and groups throughout the country to recognize the need for determining vitamin D levels and to ensure the public have their blood levels of vitamin D tested. According to research from the newly published study by Cedric F. Garland, Dr. P.H., FACE, Department of Family and Preventive Medicine and Moores Cancer Center of the University of California, San Diego (UCSD), "It is projected that raising the minimum year-around serum 25(OH)D level to 40-60 ng/ml (100-150 nmol/L) would prevent approximately 58,000 new cases of breast cancer and 49,000 new cases of colorectal cancer each year, and three quarters of deaths from these diseases, in the US and Canada."

Women who are vitamin D deficient when they are diagnosed with breast cancer are more likely to have their disease spread and are more likely to die than women who have adequate vitamin D levels, new Canadian research says. The study found that women who were vitamin D deficient were 94 per cent more likely to have their cancer metastasize (spread) and 73 per cent more likely to die. The research was led by Dr. Pamela Goodwin, a breast cancer researcher at Mount Sinai Hospital in Toronto. The study analyzed blood samples and disease outcome from more than 500 women diagnosed with breast cancer between 1989 and 1995. Women were followed up for an average of 11 years.

An estimate of cancer mortality rate reductions in Europe and the US with 1,000 IU of oral vitamin D per day. Grant WB, Garland CF, Gorham ED. Recent Results Cancer Res. 2007;174:225-34. Review. PMID: 17302200

Meta-analysis: longitudinal studies of serum vitamin D and colorectal cancer risk. Yin L, Grandi N, Raum E, Haug U, Arndt V, Brenner H. Aliment Pharmacol Ther. 2009 Jul 1;30(2):113-25. Epub 2009 Apr 15. PMID: 19392870 DOI: 10.1111/j.1365-2036.2009.04022.x Conclusions Our results support suggestions that serum 25(OH)D is inversely related to CRC risk.

Ät extra D-vitamin och förläng livet. Tillskott minskar risken för att dö i alla sjukdomar med åtta procent, visar en stor internationell studie. Ledande forskare efterlyser nu en internationell debatt om berikning av mat och en försiktig omvärdering av vår restriktiva syn på solbad. Det är forskare vid WHO:s internationella institut för cancerforskning i Lyon, IARC, som gått igenom 18 stora studier kring D-vitamin som publicerats fram till november 2006. Sammanlagt ingick 57311 personer som i genomsnitt följdes i nästan sex år. Under perioden avled 4777 av dem. När forskarnas slog ihop alla olika dödsorsaker upptäckte de att den totala dödligheten var åtta procent mindre bland dem som regelbundet åt extra D-vitamin. Tillskotten låg mellan 300 och 2000 internationella enheter, IU, men var i medeltal på en nivå som är normal i vanliga vitamintabletter, närmare bestämt 528 IU.

Association between serum 25(OH)D and death from prostate cancer. Tretli S, Hernes E, Berg JP, Hestvik UE, Robsahm TE. Br J Cancer. 2009 Feb 10;100(3):450-4. Epub 2009 Jan 20. PMID: 19156140 doi:10.1038/sj.bjc.6604865 The serum level of 25(OH)D may be involved in disease progression and is a potential marker of prognosis in patients with prostate cancer.

Vitamin D is associated with improved survival in early-stage non-small cell lung cancer patients. Zhou W, Suk R, Liu G, Park S, Neuberg DS, Wain JC, Lynch TJ, Giovannucci E, Christiani DC. Cancer Epidemiol Biomarkers Prev. 2005 Oct;14(10):2303-9. PMID: 16214909 In conclusion, the joint effects of surgery season and recent vitamin D intake seem to be associated with the survival of early-stage non-small cell lung cancer patients.

Prospective study of predictors of vitamin D status and survival in patients with colorectal cancer K Ng, B M Wolpin, J A Meyerhardt, K Wu, A T Chan, B W Hollis, E L Giovannucci, M J Stampfer, W C Willett and C S Fuchs Br J Cancer 101: 916-923; advance online publication, August 18, 2009; doi:10.1038/sj.bjc.6605262

Dairy and bone health. Heaney RP. J Am Coll Nutr. 2009 Feb;28 Suppl 1:82S-90S. PMID: 19571166

Dietary acid-base balance, bone resorption, and calcium excretion. Jajoo R, Song L, Rasmussen H, Harris SS, Dawson-Hughes B. J Am Coll Nutr. 2006 Jun;25(3):224-30. PMID: 16766781 Conclusions: Diet changes that increase renal NAE are associated with increases in serum PTH, bone resorption, and calcium excretion over a 60-day period.

Acid-base balance has an effect on bone turnover, especially on the rates of bone resorption and calcium mobilization. Bone mineral participates in the defense against acid-base disturbances, especially against metabolic acidosis (Lemann et al. 1966, Green & Kleeman 1991). The role of the bone mineral is important in the acid-base disorders, as no appreciable change in the intestinal calcium absorption occurs (Bichara et al. 1990). In the mammalian body, mainly three hormones regulate the calcium metabolism and the bone turnover. 1,25-dihydroxycholecalciferol (vitamin D derivative) increases calcium absorption from the intestine and, indirectly, from bone. Parathyroid hormone mobilizes calcium from the bone and increases the urinary phosphate excretion. Calcitonin inhibits bone resorption (Ganong 1981). Used as drugs, these hormones are also capable of inducing acid-base disorders. Calcitonin administration (Escanero et al. 1991) and vitamin D excess (Bichara et al. 1990) have been reported to cause metabolic alkalosis.

Evidence-based decision making on micronutrients and chronic disease: long-term randomized controlled trials are not enough. Ames BN, McCann JC, Stampfer MJ, Willett WC. Am J Clin Nutr. 2007 Aug;86(2):522-3; author reply 523-4. PMID: 17684228