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Matti Narkia

Vitamin D and calcium supplementation reduces cancer risk: results of a randomized trial -- Lappe et al. 85 (6): 1586 -- American Journal of Clinical Nutrition - 0 views

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    Vitamin D and calcium supplementation reduces cancer risk: results of a randomized trial. Lappe JM, Travers-Gustafson D, Davies KM, Recker RR, Heaney RP. Am J Clin Nutr. 2007 Jun;85(6):1586-91. Erratum in: Am J Clin Nutr. 2008 Mar;87(3):794. PMID: 17556697 Conclusions: Improving calcium and vitamin D nutritional status substantially reduces all-cancer risk in postmenopausal women.
Matti Narkia

the Vitamin D Society - 0 views

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    Our vision: To significantly improve the health of Canadians through the preventative health strategy of maintaining optimum vitamin D blood levels.
Matti Narkia

Vitamin D deficiency is the cause of common obesity - 0 views

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    Vitamin D deficiency is the cause of common obesity. Foss YJ. Med Hypotheses. 2009 Mar;72(3):314-21. Epub 2008 Dec 2. PMID: 19054627 doi:10.1016/j.mehy.2008.10.005 Common obesity and the metabolic syndrome may therefore result from an anomalous adaptive winter response. The stimulus for the winter response is proposed to be a fall in vitamin D. The synthesis of vitamin D is dependent upon the absorption of radiation in the ultraviolet-B range of sunlight. At ground level at mid-latitudes, UV-B radiation falls in the autumn and becomes negligible in winter. It has previously been proposed that vitamin D evolved in primitive organisms as a UV-B sensitive photoreceptor with the function of signaling changes in sunlight intensity. It is here proposed that a fall in vitamin D in the form of circulating calcidiol is the stimulus for the winter response, which consists of an accumulation of fat mass (obesity) and the induction of a winter metabolism (the metabolic syndrome). Vitamin D deficiency can account for the secular trends in the prevalence of obesity and for individual differences in its onset and severity. It may be possible to reverse the increasing prevalence of obesity by improving vitamin D status.
Matti Narkia

Athletic Performance and Vitamin D : Medicine & Science in Sports & Exercise - 0 views

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    Athletic performance and vitamin D. Cannell JJ, Hollis BW, Sorenson MB, Taft TN, Anderson JJ. Med Sci Sports Exerc. 2009 May;41(5):1102-10. Review. PMID: 19346976 doi: 10.1249/MSS.0b013e3181930c2b Conclusions: Vitamin D may improve athletic performance in vitamin D-deficient athletes. Peak athletic performance may occur when 25(OH)D levels approach those obtained by natural, full-body, summer sun exposure, which is at least 50 ng·mL-1. Such 25(OH)D levels may also protect the athlete from several acute and chronic medical conditions.
Matti Narkia

Vitamin-D supplements benefit diabetic Indian women - 0 views

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    "Women from India, Pakistan and Sri Lanka with insulin resistance showed marked improvement after taking vitamin D supplements, says a study. Von Hurst, nutrition lecturer at the Institute of Food, Nutrition and Human Health at Albany, conducted the study for her doctoral thesis. Insulin resistance is largely symptom-free and sufferers are unaware of their condition. 'Once it has fully developed into type-2 diabetes, it can be treated, but not cured,' says Von Hurst. Von Hurst says that while diet and exercise play a major part in the onset of type-2 diabetes, her findings reinforce the importance of vitamin D from the sun and supplements to prevent type-2 diabetes. She also found evidence of vitamin D increasing bone strength in older women. "
Matti Narkia

Bread Fortified with Cholecalciferol Increases the Serum 25-Hydroxyvitamin D Concentration in Women as Effectively as a Cholecalciferol Supplement -- Natri et al. 136 (1): 123 -- Journal of Nutrition - 0 views

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    Bread fortified with cholecalciferol increases the serum 25-hydroxyvitamin D concentration in women as effectively as a cholecalciferol supplement. Natri AM, Salo P, Vikstedt T, Palssa A, Huttunen M, Kärkkäinen MU, Salovaara H, Piironen V, Jakobsen J, Lamberg-Allardt CJ. J Nutr. 2006 Jan;136(1):123-7. PMID: 16365070 Both fortified breads increased serum 25-hydroxyvitamin D concentration as effectively as the cholecalciferol supplement. Supplementation or fortification did not affect serum intact parathyroid hormone concentration or urinary calcium excretion. In conclusion, fortified bread is a safe and feasible way to improve vitamin D nutrition.
Matti Narkia

The Vitamin D-Antimicrobial Peptide Pathway and Its Role in Protection Against Infection (printer-friendly) - Future Microbiol. 2009 Nov;4:1151-65. - Medscape - 0 views

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    The vitamin D-antimicrobial peptide pathway and its role in protection against infection. Gombart AF. Future Microbiol. 2009 Nov;4:1151-65. PMID: 19895218 Vitamin D deficiency has been correlated with increased rates of infection. Since the early 19th century, both environmental (i.e., sunlight) and dietary sources (cod liver) of vitamin D have been identified as treatments for TB. The recent discovery that vitamin D induces antimicrobial peptide gene expression explains, in part, the 'antibiotic' effect of vitamin D and has greatly renewed interest in the ability of vitamin D to improve immune function. Subsequent work indicates that this regulation is biologically important for the response of the innate immune system to wounds and infection and that deficiency may lead to suboptimal responses toward bacterial and viral infections. The regulation of the cathelicidin antimicrobial peptide gene is a human/primate-specific adaptation and is not conserved in other mammals. The capacity of the vitamin D receptor to act as a high-affinity receptor for vitamin D and a low-affinity receptor for secondary bile acids and potentially other novel nutritional compounds suggests that the evolutionary selection to place the cathelicidin gene under control of the vitamin D receptor allows for its regulation under both endocrine and xenobiotic response systems. Future studies in both humans and humanized mouse models will elucidate the importance of this regulation and lead to the development of potential therapeutic applications
Matti Narkia

Over 65? Take lots of vitamin D to prevent a fall: MedlinePlus - 0 views

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    "NEW YORK (Reuters Health) - Important news for seniors: A daily dose of vitamin D cuts your risk of falling substantially, researchers reported today. But not just any dose will do. "It takes 700 to 1000 international units (IU) of vitamin D per day and nothing less will work," Dr. Heike A. Bischoff-Ferrari, who directs the Center on Aging and Mobility at the University of Zurich, Switzerland, noted in an email to Reuters Health. Those recommendations - which are higher than those by the U.S. Institute of Medicine -- are based on the results of eight studies that looked at vitamin D supplements for fall prevention among more than 2,400 adults aged 65 and older. Falls were not notably reduced with daily doses of vitamin D lower than 700 IU. An analysis of all eight studies, posted online today in the British Medical Journal, add weight to several others which have shown that vitamin D improves strength and balance, and bone health in the elderly, the researchers note."
Matti Narkia

GrassrootsHealth | Vitamin D Action - Vitamin D Scientists' Call to Action Statement - 0 views

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    "We are aware of substantial scientific evidence supporting the role of vitamin D in prevention of cancer. It has been reasonably established that adequate serum vitamin D metabolite levels are associated with substantially lower incidence rates of several types of cancer, including those of the breast, colon, and ovary, and other sites. We have concluded that the vitamin D status of most individuals in North America will need to be greatly improved for substantial reduction in incidence of cancer. Epidemiological studies have shown that higher vitamin D levels are also associated with lower risk of Type I diabetes in children and of multiple sclerosis. Several studies have found that markers of higher vitamin D levels are associated with lower incidence and severity of influenza and several other infectious diseases."
Matti Narkia

Maybe Vitamin D Isn't The Answer After All - Dr. Len's Cancer Blog - 0 views

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    "We have been bombarded over the past couple of years with scientific articles suggesting that vitamin D is the key to improving many aspects of our health, including reducing the risks of dying from cancer. An article in this week's Journal of the National Cancer Institute reminds us that perhaps we should be a bit cautious in embracing vitamin D as "the answer" before we do more research. The report, from the National Cancer Institute and the Centers for Disease Control and Prevention, concluded that vitamin D levels in the blood were not related to overall cancer mortality. However, the study did find that higher levels of vitamin D were associated with a substantial decrease in the risk of dying from colorectal cancer, and possibly with a reduction in the risk of dying from breast cancer."
Matti Narkia

Women With Breast Cancer Have Low Vitamin D Levels - 0 views

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    "ScienceDaily (Oct. 8, 2009) - Women with breast cancer should be given high doses of vitamin D because a majority of them are likely to have low levels of vitamin D, which could contribute to decreased bone mass and greater risk of fractures, according to scientists at the University of Rochester Medical Center." Scientists funded by the NCI analyzed vitamin D levels in each woman, and the average level was 27 nanograms per milliliter; more than two-thirds of the women had vitamin deficiency. Weekly supplementation with high doses of vitamin D -- 50,000 international units or more -- improved the levels, according to Peppone's study. The U.S. Institute of Medicine suggests that blood levels nearing 32 nanograms per milliliter are adequate.
Matti Narkia

Effects of vitamin D supplementation on strength, physical performance, and falls in older persons: a systematic review. - Wiley InterScience :: Article :: HTML Full Text - 0 views

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    Effects of vitamin D supplementation on strength, physical performance, and falls in older persons: a systematic review. Latham NK, Anderson CS, Reid IR. J Am Geriatr Soc. 2003 Sep;51(9):1219-26. Review. PMID: 12919233 DOI: 10.1046/j.1532-5415.2003.51405. Conclusion: Although there is insufficient evidence that vitamin D supplementation alone improves physical performance in older people, some data suggest a benefit from vitamin D combined with calcium supplementation, but this requires confirmation in large, well-designed trials.
Matti Narkia

Vitamin D and MS: Burton - 0 views

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    "Dr. Jodie Burton is the acting principal investigator (PI) of the dose-escalation trial of oral vitamin D3 with calcium supplementation in patients with multiple sclerosis with Dr. O'Connor. She started the trial as his fellow, while doing an additional 2 years of training in MS specifically after she received her neurology certification. She completed her fellowship training in 2007. Now she is staff doing clinical research and continuing with the vitamin D trial. As of August 2009, she will be Assistant Professor in Neurology in the Department of Clinical Neuroscience in Calgary and at the University of Calgary. She will be part of the MS team there with Dr. Luanne Metz and the MS group. Please scroll down for an abstract of the trial: A Phase I/II dose-escalation trial of oral vitamin D3 with calcium supplementation in patients with multiple sclerosis." Conclusions: High-dose VD3 (~10 000 IU/day, possibly higher) in MS is safe and tolerable, with evidence of clinical improvement."
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Natural Skin Care Products - 1 views

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