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Matti Narkia

Calculated Ultraviolet Exposure Levels for a Healthy Vitamin D Status - easy version - 0 views

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    An acknowledged benefit of exposure to ultraviolet radiation is synthesis of vitamin D in human skin. Here we have defined a standard vitamin D dose based upon recommended requirements for vitamin D, and present a simplified web-based tool that enables the user to calculate associated exposure times for any time and place ( http://nadir.nilu.no/~olaeng/fastrt/VitD-ez_quartMED.html). This www page is a simplified version of the more complex web tool ( http://nadir.nilu.no/~olaeng/fastrt/VitD_quartMED.html). The simplified www page is convenient for users unfamiliar to radiative transfer modelling, because the model input is limited and more intuitive.
Matti Narkia

Calculated Ultraviolet Exposure Levels for a Healthy Vitamin D Status - 0 views

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    An acknowledged benefit of exposure to ultraviolet radiation is synthesis of vitamin D in human skin. Here we have defined a standard vitamin D dose based upon recommended requirements for vitamin D, and present a web-based tool that enables the user to calculate associated exposure times for any time and place ( http://nadir.nilu.no/~olaeng/fastrt/VitD_quartMED.html). The recommended UV exposure times depends on latitude, time, total ozone, clouds, aerosols, surface reflectivity and altitude all of which can be specified by the user. A simpler version for non-experts is available at http://nadir.nilu.no/~olaeng/fastrt/VitD-ez_quartMED.html
Matti Narkia

Vitamin D levels associated with survival in lymphoma patients - 0 views

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    ScienceDaily (Dec. 5, 2009) - A new study has found that the amount of vitamin D in patients being treated for diffuse large B-cell lymphoma was strongly associated with cancer progression and overall survival. The results will be presented at the annual meeting of the American Society of Hematology in New Orleans.

    Also, several recent reports have concluded that vitamin D deficiency is associated with poor outcomes in other cancers, including breast, colon and head and neck cancer. This is the first study to look at lymphoma outcome
Matti Narkia

Vitamin D and influenza - Wikipedia, the free encyclopedia - 0 views

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    "Numerous studies link Vitamin D and influenza, as well as Vitamin D and respiratory infections more generally. This vitamin up-regulates genetic expression of various endogenous antimicrobial peptides (AMP), which exhibit broad-spectrum microbicidal activity against bacteria, fungi, and viruses. Reports discussed below indicate that susceptibility to influenza is reduced with higher levels of sun exposure or vitamin D supplementation. Seasonal variation of vitamin D levels in humans can help explain the seasonality of flu epidemics."
Matti Narkia

Vitamin D association with estradiol and progesterone in young women - Cancer Causes Co... - 0 views

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    Vitamin D association with estradiol and progesterone in young women.
    Knight JA, Wong J, Blackmore KM, Raboud JM, Vieth R.
    Cancer Causes Control. 2009 Nov 15. [Epub ahead of print]
    PMID: 19916051

    Conclusions Higher levels of vitamin D may reduce progesterone and estradiol, providing a potential mechanism for reduction in breast cancer risk from increased vitamin D exposure in young women
Matti Narkia

Inverse association between serum 25(OH) vitamin D levels and non-melanoma skin cancer ... - 0 views

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    Inverse association between serum 25(OH) vitamin D levels and non-melanoma skin cancer in elderly men.
    Tang JY, Parimi N, Wu A, John Boscardin W, Shikany JM, Chren MM, Cummings SR, Epstein EH Jr, Bauer DC; for the Osteoporotic Fractures in Men (MrOS) Study Group.
    Cancer Causes Control. 2009 Nov 18. [Epub ahead of print]
    PMID: 19921445

    Our results suggest that a diagnosis of NMSC is not a surrogate for adequate 25(OH)D levels or increased UV exposure, and high 25(OH)D levels may be associated with a reduced risk of NMSC.
Matti Narkia

Vitamin D could ease symptoms for MS sufferers - ABC News (Australian Broadcasting Corp... - 0 views

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    "Posted Tue Nov 17, 2009 4:01pm AEDT
    Updated Tue Nov 17, 2009 4:27pm AEDT
    Researchers are advising people with MS to take safe levels of vitamin D supplements.

    Researchers are advising people with MS to take safe levels of vitamin D supplements. (ABC News: Giulio Saggin, file photo)

    * Audio: New research shows Vitamin D may slow the progress of MS (The World Today)

    Australian scientists have found that Vitamin D may slow the progression of multiple sclerosis (MS).

    Figures showing that people living in Tasmania are seven times more likely to develop MS than Queenslanders had suggested a link between sunlight exposure and the disease. "
Matti Narkia

Arch Intern Med -- 25-Hydroxyvitamin D Levels and the Risk of Mortality in the General ... - 0 views

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    25-hydroxyvitamin D levels and the risk of mortality in the general population.
    Melamed ML, Michos ED, Post W, Astor B.
    Arch Intern Med. 2008 Aug 11;168(15):1629-37.
    PMID: 18695076

    Conclusion The lowest quartile of 25(OH)D level (<17.8 ng/mL) is independently associated with all-cause mortality in the general population.
Matti Narkia

Low vitamin D tied to heart, stroke deaths: MedlinePlus - 0 views

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    "NEW YORK (Reuters Health) - Low vitamin D levels in the body may be deadly, according to a new study hinting that adults with lower, versus higher, blood levels of vitamin D may be more likely to die from heart disease or stroke.

    Vitamin D is an essential vitamin mostly obtained from direct sunlight exposure, but also found in foods and multivitamins.

    Dr. Annamari Kilkkinen, at the National Institute for Health and Welfare in Helsinki, Finland, and colleagues compared blood levels of vitamin D and deaths from heart disease or stroke over time in 2,817 men and 3,402 women in Finland."
Matti Narkia

Optimal Serum 25-Hydroxyvitamin D Levels for Multiple Health Outcomes - SpringerLink - ... - 1 views

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    Optimal serum 25-hydroxyvitamin D levels for multiple health outcomes.
    Bischoff-Ferrari HA.
    Adv Exp Med Biol. 2008;624:55-71. Review.
    PMID: 18348447
    DOI: 10.1007/978-0-387-77574-6_5

    Recent evidence suggests that higher vitamin D intakes beyond current recommendations may be associated with better health outcomes. In this chapter, evidence is summarized from different studies that evaluate threshold levels for serum 25(OH)D levels in relation to bone mineral density (BMD), lower extremity function, dental health, risk of falls, admission to nursing home, fractures, cancer prevention and incident hypertension. For all endpoints, the most advantageous serum levels for 25(OH)D appeared to be at least 75 nmol/l (30 ng/ml) and for cancer prevention, desirable 25(OH)D levels are between 90-120 nmol/l (36-48 ng/ml). An intake of no less than 1000IU (25 meg) of vitamin D3 (cholecalciferol) per day for all adults may bring at least 50% of the population up to 75 nmol/l. Thus, higher doses of vitamin D are needed to bring most individuals into the desired range. While estimates suggest that 2000 IU vitamin D3 per day may successfully and safely achieve this goal, the implications of 2000 IU or higher doses for the total adult population need to be addressed in future studies.
Matti Narkia

Serum 25-hydroxyvitamin D status of vegetarians, partial vegetarians, and nonvegetarian... - 0 views

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    Serum 25-hydroxyvitamin D status of vegetarians, partial vegetarians, and nonvegetarians: the Adventist Health Study-2.
    Chan J, Jaceldo-Siegl K, Fraser GE.
    Am J Clin Nutr. 2009 May;89(5):1686S-1692S. Epub 2009 Apr 1.
    PMID: 19339396

    Conclusions: s25(OH)D concentrations were not associated with vegetarian status. Other factors, such as vitamin D supplementation, degree of skin pigmentation, and amount and intensity of sun exposure have greater influence on s25(OH)D than does diet.
Matti Narkia

Differences in vitamin D status between countries in young adults and the elderly - 0 views

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    Differences in vitamin D status between countries in young adults and the elderly.
    McKenna MJ.
    Am J Med. 1992 Jul;93(1):69-77.
    PMID: 1385673

    PURPOSE: To compare vitamin D status between countries in young adults and in the elderly. MATERIALS AND METHODS: Reports on vitamin D status (as assessed by serum 25-hydroxyvitamin D) from 1971 to 1990 were reviewed. Studies were grouped according to geographic regions: North America (including Canada and the United States); Scandinavia (including Denmark, Finland, Norway, and Sweden); and Central and Western Europe (including Belgium, France, Germany, Ireland, The Netherlands, Switzerland, and the United Kingdom). RESULTS: Vitamin D status varies with the season in young adults and in the elderly, and is lower during the winter in Europe than in both North America and Scandinavia. Oral vitamin D intake is lower in Europe than in both North America and Scandinavia. Hypovitaminosis D and related abnormalities in bone chemistry are most common in elderly residents in Europe but are reported in all elderly populations. CONCLUSIONS: The vitamin D status in young adults and the elderly varies widely with the country of residence. Adequate exposure to summer sunlight is the essential means to ample supply, but oral intake augmented by both fortification and supplementation is necessary to maintain baseline stores. All countries should adopt a fortification policy. It seems likely that the elderly would benefit additionally from a daily supplement of 10 micrograms of vitamin D.
Matti Narkia

Prostate cancer risk and prediagnostic serum 25-hydroxyvitamin D levels (Finland). - Ca... - 0 views

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    Prostate cancer risk and prediagnostic serum 25-hydroxyvitamin D levels (Finland).
    Ahonen MH, Tenkanen L, Teppo L, Hakama M, Tuohimaa P.
    Cancer Causes Control. 2000 Oct;11(9):847-52.
    PMID: 11075874
    DOI: 10.1023/A:1008923802001

    CONCLUSIONS: We conclude that low levels of 25-VD associated with an increased risk for subsequent earlier exposure and more aggressive development of prostate cancer, especially before the andropause.
Matti Narkia

Estimates of optimal vitamin D status. - Osteoporos Int. 2005 Jul;16(7):713-6. - Spring... - 0 views

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    Estimates of optimal vitamin D status.
    Dawson-Hughes B, Heaney RP, Holick MF, Lips P, Meunier PJ, Vieth R.
    Osteoporos Int. 2005 Jul;16(7):713-6. Epub 2005 Mar 18.
    PMID: 15776217
Matti Narkia

Vitamin D serum levels and allergic rhinitis. - Wiley InterScience :: Article :: HTML F... - 0 views

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    Vitamin D serum levels and allergic rhinitis.
    Wjst M, Hyppönen E.
    Allergy. 2007 Sep;62(9):1085-6.
    PMID: 17686112 DOI:
    10.1111/j.1398-9995.2007.01437.x
Matti Narkia

25(OH)D Serum Levels Decline With Age Earlier in Women Than in Men and Less Efficiently... - 0 views

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    25(OH)D Serum levels decline with age earlier in women than in men and less efficiently prevent compensatory hyperparathyroidism in older adults.
    Maggio D, Cherubini A, Lauretani F, Russo RC, Bartali B, Pierandrei M, Ruggiero C, Macchiarulo MC, Giorgino R, Minisola S, Ferrucci L.
    J Gerontol A Biol Sci Med Sci. 2005 Nov;60(11):1414-9.
    PMID: 16339327

    Conclusions. These findings suggest that the age-associated fall of serum 25(OH)D starts earlier in women than in men and that higher levels of 25(OH)D are required in older compared to younger persons to avoid the age-associated compensatory hyperparathyroidism.
Matti Narkia

New Research by D*action Member Dr. Cedric Garland Suggests Role Low Levels of Vitamin ... - 0 views

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    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."
Matti Narkia

Both high and low levels of blood vitamin D are associated with a higher prostate cance... - 0 views

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    Both high and low levels of blood vitamin D are associated with a higher prostate cancer risk: a longitudinal, nested case-control study in the Nordic countries.
    Tuohimaa P, Tenkanen L, Ahonen M, Lumme S, Jellum E, Hallmans G, Stattin P, Harvei S, Hakulinen T, Luostarinen T, Dillner J, Lehtinen M, Hakama M.
    Int J Cancer. 2004 Jan 1;108(1):104-8.
    PMID: 14618623
    DOI: 10.1002/ijc.11375
Matti Narkia

Vitamin D Status Predicts Physical Performance and Its Decline in Older Persons -- Wich... - 0 views

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    Vitamin D status predicts physical performance and its decline in older persons.
    Wicherts IS, van Schoor NM, Boeke AJ, Visser M, Deeg DJ, Smit J, Knol DL, Lips P.
    J Clin Endocrinol Metab. 2007 Jun;92(6):2058-65. Epub 2007 Mar 6.
    PMID: 17341569
    doi:10.1210/jc.2006-1525

    ONCLUSIONS: Serum 25-OHD concentrations below 20 ng/ml are associated with poorer physical performance and a greater decline in physical performance in older men and women. Because almost 50% of the population had serum 25-OHD below 20 ng/ml, public health strategies should be aimed at this group.
Matti Narkia

Vitamin D Levels Linked To Asthma Severity - 0 views

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    ScienceDaily (Apr. 24, 2009) - New research provides evidence for a link between vitamin D insufficiency and asthma severity.

    Serum levels of vitamin D in more than 600 Costa Rican children were inversely linked to several indicators of allergy and asthma severity, including hospitalizations for asthma, use of inhaled steroids and total IgE levels, according to a study that will appear in the first issue for May of the American Journal of Respiratory and Critical Care Medicine.
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