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I'm sure it has no direct attack on viruses or bacteria at any useful level. Vitamin D is a hormone that controls calcium and phosphate levels in higher organisms blood streams. Bacteria and viruses don't even have blood streams.
Quote from: iko on 29/01/2008 13:29:51It's never too late (sometimes)...If you followed this thread so far,you deserve to watch this free video: "The Vitamin D Pandemic and its Health Consequences" Presented by Michael Holick, PhD, MD, Professor of medicine, physiology and biophysicsand director of the General Clinical Research Center at Boston University Medical CenterKeynote address at the opening ceremony of the 34th European Symposium on Calcified Tissues, Copenhagen 5 May, 2007http://www.uvadvantage.org/portals/0/pres/ http://www.uvadvantage.org/portals/0/pres/video/video/slides/slide413.jpg
It's never too late (sometimes)...If you followed this thread so far,you deserve to watch this free video: "The Vitamin D Pandemic and its Health Consequences" Presented by Michael Holick, PhD, MD, Professor of medicine, physiology and biophysicsand director of the General Clinical Research Center at Boston University Medical CenterKeynote address at the opening ceremony of the 34th European Symposium on Calcified Tissues, Copenhagen 5 May, 2007http://www.uvadvantage.org/portals/0/pres/ http://www.uvadvantage.org/portals/0/pres/video/video/slides/slide413.jpg
Millions of U.S. Children Low In Vitamin DCONCLUSIONSThe increasing numbers of reports of rickets in Western industrialized nations are related to the practice of exclusive breastfeeding without concomitant vitamin D supplementation in northern latitudes, decreased UV-B exposure (particularly in dark-skinned people), and the excessive use of sunscreen. Recommendations for vitamin D supplementation in breastfed infants should take into account skin pigmentation and geography.Recommendations for fortification of commonly used foods with vitamin D are necessary in keeping with various cultural norms of food intake and geography. Current recommendations of sun exposure and vitamin D supplementation are limited because of a paucity of studies in children, nonuniformity of 25(OH)-D assays used in research studies, and lack of uniformity in the description of normal and abnormal ranges for 25(OH)-D levels in children. More studies are necessary in children using standard assays to determine safe levels of sun exposure and resultant vitamin D levels, as well as the 25(OH)-D levels below which pathologic changes begin. A low threshold for assessing vitamin D sufficiency in infants, children, and adolescents is recommended given the growing knowledge about effects of vitamin D not only on bone mineral metabolism but also on the immune system and in preventing various kinds of cancer. Data indicate greater health care costs from diseases related to vitamin D deficiency than from those caused by excessive exposure to UVR, indicating the need for a reexamination of recommendations for sun-avoidant behavior, including the use of sunscreens.
Here are the new stories:Diabetes + Virus...Here are some Vitamin D research links:Diabetes (PubMed - Vitamin D supplementation in early childhood and risk of type 1 diabetes: a systematic review and meta-analysis.)...
Seasonal variation of diagnosis of Type 1 diabetes mellitus in children worldwideABSTRACTAims To determine if there is a worldwide seasonal pattern in the clinical onset of Type 1 diabetes.Methods Analysis of the seasonality in diagnosis of Type 1 diabetes was based on the incidence data in 0- to 14-year-old children collected by the World Health Organization Diabetes Mondiale (WHO DiaMond) Project over the period 1990–1999. One hundred and five centres from 53 countries worldwide provided enough data for the seasonality analysis. The incidence seasonality patterns were also determined for age- and sex-specific groups.Results Forty-two out of 105 centres exhibited significant seasonality in the incidence of Type 1 diabetes (P < 0.05). The existence of significant seasonal patterns correlated with higher level of incidence and of the average yearly counts. The correlation disappeared after adjustment for latitude. Twenty-eight of those centres had peaks in October to January and 33 had troughs in June to August. Two out of the four centres with significant seasonality in the southern hemisphere demonstrated a different pattern with a peak in July to September and a trough in January to March.Conclusions The seasonality of the incidence of Type 1 diabetes mellitus in children under 15 years of age is a real phenomenon, as was reported previously and as is now demonstrated by this large standardized study. The seasonality pattern appears to be dependent on the geographical position, at least as far as the northern/southern hemisphere dichotomy is concerned. However, more data are needed on the populations living below the 30th parallel north in order to complete the picture.
... enteroviruses - a common family of viruses which cause symptoms such as vomiting and diarrhoea
Human enteroviruses (family Picornaviridae) infect millions of people worldwide each year, resulting in a wide range of clinical outcomes ranging from unapparent infection to mild respiratory illness (common cold), hand, foot and mouth disease, acute hemorrhagic conjunctivitis, aseptic meningitis, myocarditis, severe neonatal sepsis-like disease, and acute flaccid paralysis.
It typically occurs in small epidemics in nursery schools or kindergartens, usually during the summer and autumn months.
Life course sun exposure and risk of prostate cancer: population-based nested case-control study and meta-analysis...Our data and meta-analyses provide limited support for the hypothesis that increased exposure to sunlight may reduce prostate cancer risk. The findings warrant further investigation because of their implications for vitamin D chemoprevention trials. 2009 UICC
Vitamin D and multiple sclerosisRecently, it has been clearly demonstrated that exogenous 1,25-dihydroxyvitamin D3, the hormonal form of vitamin D3, can completely prevent experimental autoimmune encephalomyelitis (EAE), a widely accepted mouse model of human multiple sclerosis (MS). This finding has focused attention on the possible relationship of this disease to vitamin D. Although genetic traits certainly contribute to MS susceptibility, an environmental factor is also clearly involved. It is our hypothesis that one crucial environmental factor is the degree of sunlight exposure catalyzing the production of vitamin D3 in skin, and, further, that the hormonal form of vitamin D3 is a selective immune system regulator inhibiting this autoimmune disease. Thus, under low-sunlight conditions, insufficient vitamin D3 is produced, limiting production of 1,25-dihydroxyvitamin D3, providing a risk for MS. Although the evidence that vitamin D3 is a protective environmental factor against MS is circumstantial, it is compelling. This theory can explain the striking geographic distribution of MS, which is nearly zero in equatorial regions and increases dramatically with latitude in both hemispheres. It can also explain two peculiar geographic anomalies, one in Switzerland with high MS rates at low altitudes and low MS rates at high altitudes, and one in Norway with a high MS prevalence inland and a lower MS prevalence along the coast. Ultraviolet (UV) light intensity is higher at high altitudes, resulting in a greater vitamin D3 synthetic rate, thereby accounting for low MS rates at higher altitudes. On the Norwegian coast, fish is consumed at high rates and fish oils are rich in vitamin D3. Further, experimental work on EAE provides strong support for the importance of vitamin D3 in reducing the risk and susceptibility for MS. If this hypothesis is correct, then 1,25-dihydroxyvitamin D3 or its analogs may have great therapeutic potential in patients with MS. More importantly, current research together with data from migration studies opens the possibility that MS may be preventable in genetically susceptible individuals with early intervention strategies that provide adequate levels of hormonally active 1,25-dihydroxyvitamin D3 or its analogs.
From time to time I get a cold- It's a viral infection.I get a headache and a runny nose so I take one of the over-the-counter remedies that are on the market. The symptoms are reduced.Nobody claims that the aspirin and decongestant are killing the cold virus.Vitamin D may well cure the symptoms of MS and (at least some cases of) MS may be caused by a virus. (And if that's generally true then it's certainly interesting, in spite of the toxicity of vitamin D.)That doesn't mean that vitamin D kills the virus.