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Matti Narkia

How Much Vitamin D3 Do the Elderly Need? -- Viljakainen et al. 25 (5): 429 -- Journal o... - 0 views

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    How much vitamin D3 do the elderly need? Viljakainen HT, Palssa A, Kärkkäinen M, Jakobsen J, Lamberg-Allardt C. J Am Coll Nutr. 2006 Oct;25(5):429-35. PMID: 17031013 Conclusions: A clear dose response was noted in S-25-OHD to different doses of vitamin D3. The recommended dietary intake of 15 µg is adequate to maintain the S-25-OHD concentration around 40-55 nmol/L during winter, but if the optimal S-25-OHD is higher than that even higher vitamin D intakes are needed. Interestingly, subjects with lower vitamin D status at baseline responded more efficiently to supplementation than those with more adequate status
Matti Narkia

Vitamin D and Type 2 Diabetes - Diabetes - 0 views

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    Vitamin D and type 2 diabetes: are we ready for a prevention trial? Scragg R. Diabetes. 2008 Oct;57(10):2565-6. PMID: 18820212 doi: 10.2337/db08-0879 Despite evidence from the current article (3) and the Finnish study (17), doubts still remain about whether low vitamin status is a cause of type 2 diabetes. Further cohort studies are required, assessing baseline vitamin D status using blood 25(OH)D to be sure that the Ely and Finnish studies are not false-positive results. Glucose clamp studies are also required because we are still not sure of the mechanism influenced by vitamin D-whether it is insulin resistance, secretion, or both. But most importantly, given that nearly three decades have passed since the first studies linking vitamin D with insulin metabolism (6,7), well-designed clinical trials of the effect of vitamin D supplementation on glycemia status and diabetes risk are urgently required to settle this question. And they need to prevent past mistakes. In particular, the vitamin D dose given in such trials needs to be high enough-above 2,000 IU per day (19)-to raise blood 25(OH)D levels above 80 nmol/l because diabetes risk is lowest at this level (9,20). If well-designed trials are carried out and confirm a protective effect from vitamin D, it could be used by the general population as a simple and cheap solution to help prevent the diabetes epidemic.
Matti Narkia

Prospective Study of Predictors of Vitamin D Status and Cancer Incidence and Mortality ... - 0 views

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    Prospective study of predictors of vitamin D status and cancer incidence and mortality in men. Giovannucci E, Liu Y, Rimm EB, Hollis BW, Fuchs CS, Stampfer MJ, Willett WC. J Natl Cancer Inst. 2006 Apr 5;98(7):451-9. PMID: 16595781 doi:10.1093/jnci/djj101 Conclusions: Low levels of vitamin D may be associated with increased cancer incidence and mortality in men, particularly for digestive-system cancers. The vitamin D supplementation necessary to achieve a 25(OH)D increment of 25 nmol/L may be at least 1500 IU/day.
Matti Narkia

D-vitamiinin puute voi heikentää aivojen toimintaa | Terveys ja hyvinvointi |... - 0 views

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    Usean Euroopan maan yhteistyönä tehdyssä tutkimuksessa on saatu alustavia viitteitä siitä, että D-vitamiinin puute voi liittyä älyllisten toimintojen heikentymiseen. Tutkimuksessa kartoitettiin 3 400 keski-ikäiseltä ja iäkkäältä mieheltä, miten elimistön D-vitamiinipitoisuus oli yhteydessä aivojen kognitiivisiin toimintoihin. Miehet suorittivat kolme kognitiivisia eli tiedollisia taitoja kartoittavaa testiä. D-vitamiinipitoisuuden mittarina käytettiin elimistön D-vitamiinitilannetta parhaiten kuvastavaa seerumin 25(OH)D3-pitoisuutta, jonka riittävänä arvona pidetään 50-75 nmol/l. Tuloksista ilmeni, että miehet, joiden 25(OH)D3-pitoisuus oli suuri, menestyivät kognitiivisissa testeissä paremmin kuin miehet, joiden vitamiinipitoisuus oli pieni.
Matti Narkia

Circulating 25-Hydroxyvitamin D Levels Indicative of Vitamin D Sufficiency: Implication... - 0 views

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    Using these functional indicators, several studies have more accurately defined vitamin D deficiency as circulating levels of 25(OH)D ≤ 80 nmol or 32 µg/L. Recent studies reveal that current dietary recommendations for adults are not sufficient to maintain circulating 25(OH)D levels at or above this level, especially in pregnancy and lactation. Circulating 25-hydroxyvitamin D levels indicative of vitamin D sufficiency: implications for establishing a new effective dietary intake recommendation for vitamin D. Hollis BW. J Nutr. 2005 Feb;135(2):317-22. Review. PMID: 15671234 [
Matti Narkia

Clinical Guide to Sunscreens and Photoprotection - Google Books - 0 views

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    Designed with practicing dermatologists, dermatology trainees, physicians, and scientists interested in photoprotection in mind, this concise and highly illustrated guide provides the latest knowledge of photoprotection in dermatology and cosmetic science. Clinical Guide to Sunscreens and Photoprotectionalso addresses recent important international and domestic regulatory activity and requirements on the use of novel sun protective chemicals and proper labeling of products to ensure increased consumer awareness.This concisely written, problem-oriented text explores See chapter by Bischoff-Ferrari et al. from page 119 dealing with what dose is needed for 25(OH)D level of 80 nmol/l in 97% of population
Matti Narkia

Epidemiology of Vitamin D Insufficiency and Cancer Mortality - Anticancer Research - 0 views

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    Epidemiology of vitamin D insufficiency and cancer mortality. Pilz S, Tomaschitz A, Obermayer-Pietsch B, Dobnig H, Pieber TR. Anticancer Res. 2009 Sep;29(9):3699-704. Review. PMID: 19667167 In conclusion, we still need further studies to evaluate the association of vitamin D insufficiency and cancer incidence and mortality, but the multiple health benefits of vitamin D and the easy, safe and inexpensive way by which vitamin D can be supplemented should already guide current public health strategies to achieve 25(OH)D levels of at least 75 nmol/l (30 ng/ml) in the general population.
Matti Narkia

Randomized comparison of the effects of the vitamin D3 adequate intake versus 100 mcg (... - 0 views

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    Randomized comparison of the effects of the vitamin D3 adequate intake versus 100 mcg (4000 IU) per day on biochemical responses and the wellbeing of patients. Vieth R, Kimball S, Hu A, Walfish PG. Nutr J. 2004 Jul 19;3:8. PMID: 15260882 doi:10.1186/1475-2891-3-8 CONCLUSION: The highest AI for vitamin D brought summertime 25(OH)D to >40 nmol/L, lowered PTH, and its use was associated with improved wellbeing. The 100 mcg/day dose produced greater responses. Since it was ethically necessary to provide a meaningful dose of vitamin D to these insufficient patients, we cannot rule out a placebo wellbeing response, particularly for those on the lower dose. This work confirms the safety and efficacy of both 15 and 100 mcg/day vitamin D3 in patients who needed additional vitamin D.
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

D-vitamiini ravintolisänä. Hyöty- ja riskiarvio | Tohtori Tolonen - 1 views

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    "D-vitamiini on nyt valtavan suosittu ravintolisä. Tähän asti tämän vitamiinin yliannostelun vaaroilla on peloteltu, mutta nyttemmin on käynyt ilmeiseksi, että pelottelu on ollut turhaa ja suorastaan turmiollista kansanterveydelle ja -taloudelle. Maailman johtavat sveitsiläiset ja amerikkalaiset D-vitamiinitutkijat esittävät arvionsa D-vitamiinin hyödyistä ja riskeistä luukadon ehkäisyssä. Voimassa olevat D-vitamiinin päivittäiset saantisuositukset - jotka vaihtelevat eri maissa 5 ja 15 mikrogramman (µg) välillä - voivat olla liian pienet tämän vitamiinin monipuolisten vaikutusten kannalta monien eri tautien ehkäisyssä, toteavat tutkijat kirjoituksensa alussa. He arvioivat suosituksia suurempien D-vitamiiniannosten hyötyjä ja punnitsivat mahdollisia riskejä erityisesti seerumin D-vitamiinin pitoisuuden (25-OHD, S-D-25) valossa. Arviointi perustuu satunnaistettuihin kaksoissokkokokeisiin, joista 8 käsitteli ikääntyvien ihmisten kaatumisia (N=2426) ja 12 luunmurtumia (N=42279). Tulokset osoittivat, että mitä suurempi S-D-25 oli, sitä vähemmän oli kaatumisia ja murtumia. Tosiin sanoen, suuri S-D-25 ehkäisee ikäihmisillä sekä kaatumisia että luunmurtumia. Ihanteellinen S-D-25 näyttää olevan 75-110 nmol/l, johon on mahdollista päästä nauttimalla ruoan lisänä D-vitamiinia 17,5-25 µg, päättelivät tutkijat edellä mainittujen poikkileikkaustutkimusten valossa. "
Matti Narkia

D-vitamiini on tärkeä luuston hyvinvoinnille - Lääkäriasema Pulssi - 1 views

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    "Vitamiinilisissä kannattaa suosia D3-vitamiinia On ilmeistä, että suomalaiset eivät saa ruoasta ja auringonvalosta riittävästi D-vitamiinia, niinpä onkin turvauduttava D-vitamiinilisiin. Kannattaa huomioida, että D-vitamiineissa on eroja. D2-valmisteet ovat tehottomampia kuin D3-valmisteet. D-vitamiinitason nostaminen kannattaa. Useissa tutkimuksissa on osoitettu, että jo pelkällä D-vitamiinilla pystytään vähentämään murtumia, kun potilaan D-vitamiinitaso saadaan yli 75 nmol/l. Tärkeä syy D-vitamiinin käyttöön on myös se, että D-vitamiinilla voidaan vähentää kaatumisia. D-vitamiinin on todettu parantavan ikäihmisillä lihasvoimaa ja tasapainoa ja sitä kautta vaikuttavan kaatumisriskiä pienentävästi. Erityishuomiota vaativat myös potilaat, joilta on poistettu mahalaukku tai joilla on imeytymishäiriöitä aiheuttava suolistosairaus. Heillä, kuten myös kirroosi- ja keliakiapotilailla, vaste ravinnosta saatuun D-vitamiiniin on muita huonompi. D-vitamiinilisän annosta voidaan joutua heidän kohdallaan nostamaan huomattavasti."
Matti Narkia

Vitamin D supplementation reduces insulin resistance in South Asian women living in New... - 0 views

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    Vitamin D supplementation reduces insulin resistance in South Asian women living in New Zealand who are insulin resistant and vitamin D deficient - a randomised, placebo-controlled trial. von Hurst PR, Stonehouse W, Coad J. Br J Nutr. 2009 Sep 28:1-7. [Epub ahead of print] PMID: 19781131 In conclusion, improving vitamin D status in insulin resistant women resulted in improved IR and sensitivity, but no change in insulin secretion. Optimal vitamin D concentrations for reducing IR were shown to be 80-119 nmol/l, providing further evidence for an increase in the recommended adequate levels. Registered Trial No. ACTRN12607000642482.
Matti Narkia

Manninen Nutraceuticals: D-vitamiini ehkäisee sydänkuolemia - 0 views

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    "D-vitamiini parantaa yli 65-vuotiaiden ihmisten elämänlaatua ja ehkäisee ennenaikaista sydänkuolemaa, ilmenee Amerikan geriatriyhdistyksen lehden julkaisemasta tutkimuksesta. Myös Suomen THL julkaisi vastikään raportin, jonka mukaan seerumin vähäinen D-vitamiinin pitoisuus liittyi sydäntauteihin ja -kuolemiin. Seerumin D-vitamiinin pitoisuus (25-0HD eli S-D-25), joka on pienempi kuin 25 nmol/l, liittyy suurentuneeseen sydäntautien ja kuoleman riskiin, kirjoittavat amerikkalaiset tutkijat. Heidän aineistonsa käsitti 3408 yli 65-vuotiasta miestä ja naista, joiden terveydentilaa seurattiin Third National Health and Nutrition Examination Survey (NHANES III) -tutkimuksessa. Keskimäärin 7,3 vuoden seuruun aikana kuoli 1493 (44 %) tutkituista. Vähän yli puolet (767) kuolemista johtui sydänkohtauksista."
Matti Narkia

D-vitamiini ehkäisee sydänkuolemia | Tohtori Tolonen - 0 views

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    "D-vitamiini parantaa yli 65-vuotiaiden ihmisten elämänlaatua ja ehkäisee ennenaikaista sydänkuolemaa, ilmenee Amerikan geriatriyhdistyksen lehden julkaisemasta tutkimuksesta. Myös Suomen THL julkaisi vastikään raportin, jonka mukaan seerumin vähäinen D-vitamiinin pitoisuus liittyi sydäntauteihin ja -kuolemiin. Seerumin D-vitamiinin pitoisuus (25-0HD eli S-D-25), joka on pienempi kuin 25 nmol/l, liittyy suurentuneeseen sydäntautien ja kuoleman riskiin, kirjoittavat amerikkalaiset tutkijat. Heidän aineistonsa käsitti 3408 yli 65-vuotiasta miestä ja naista, joiden terveydentilaa seurattiin Third National Health and Nutrition Examination Survey (NHANES III) -tutkimuksessa. Keskimäärin 7,3 vuoden seuruun aikana kuoli 1493 (44 %) tutkituista. Vähän yli puolet (767) kuolemista johtui sydänkohtauksista
Matti Narkia

Benefit-risk assessment of vitamin D supplementation. - Osteoporos Int. 2009 Dec 3. - S... - 0 views

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    Benefit-risk assessment of vitamin D supplementation. Bischoff-Ferrari HA, Shao A, Dawson-Hughes B, Hathcock J, Giovannucci E, Willett WC. Osteoporos Int. 2009 Dec 3. [Epub ahead of print] PMID: 19957164 Conclusion Our analysis suggests that mean serum 25(OH)D levels of about 75 to 110 nmol/l provide optimal benefits for all investigated endpoints without increasing health risks. These levels can be best obtained with oral doses in the range of 1,800 to 4,000 IU vitamin D per day; further work is needed, including subject and environment factors, to better define the doses that will achieve optimal blood levels in the large majority of the population.
Matti Narkia

A Prospective Nested Case-Control Study of Vitamin D Status and Pancreatic Cancer Risk ... - 0 views

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    A prospective nested case-control study of vitamin D status and pancreatic cancer risk in male smokers. Stolzenberg-Solomon RZ, Vieth R, Azad A, Pietinen P, Taylor PR, Virtamo J, Albanes D. Cancer Res. 2006 Oct 15;66(20):10213-9. PMID: 17047087 Higher vitamin D concentrations were associated with a 3-fold increased risk for pancreatic cancer (highest versus lowest quintile, >65.5 versus <32.0 nmol/L: OR, 2.92; 95% CI, 1.56-5.48, Ptrend = 0.001) that remained after excluding cases diagnosed early during follow-up. Contrary to expectations, subjects with higher prediagnostic vitamin D status had an increased pancreatic cancer risk compared with those with lower status. Our findings need to be replicated in other populations and caution is warranted in their interpretation and implication. Our results are intriguing and may provide clues that further the understanding of the etiology of this highly fatal cancer. In conclusion, contrary to expectation, subjects with higher 25(OH)D concentrations were at greater risk for pancreatic cancer compared with those with lower concentrations in our prospective study with long-term follow-up. Caution is warranted in the interpretation and implication of our findings, however, as vitamin D inadequacy is an important public health problem and adequate status is desirable to prevent bone and other diseases (5). Our results, however, are intriguing and may provide clues that further the understanding of the etiology of this highly fatal cancer.
Matti Narkia

Fall prevention with supplemental and active forms of vitamin D: a meta-analysis of ran... - 0 views

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    Fall prevention with supplemental and active forms of vitamin D: a meta-analysis of randomised controlled trials. Bischoff-Ferrari HA, Dawson-Hughes B, Staehelin HB, Orav JE, Stuck AE, Theiler R, Wong JB, Egli A, Kiel DP, Henschkowski J. BMJ. 2009 Oct 1;339:b3692. doi: 10.1136/bmj.b3692. PMID: 19797342 doi: 10.1136/bmj.b3692 Conclusions Supplemental vitamin D in a dose of 700-1000 IU a day reduced the risk of falling among older individuals by 19% and to a similar degree as active forms of vitamin D. Doses of supplemental vitamin D of less than 700 IU or serum 25-hydroxyvitamin D concentrations of less than 60 nmol/l may not reduce the risk of falling among older individuals.
Matti Narkia

Vitamin D for Cancer Prevention: Global Perspective - 0 views

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    Vitamin D for cancer prevention: global perspective. Garland CF, Gorham ED, Mohr SB, Garland FC. Ann Epidemiol. 2009 Jul;19(7):468-83. Review. PMID: 19523595 RESULTS/CONCLUSIONS: It is projected that raising the minimum year-around serum 25(OH)D level to 40 to 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 fourths of deaths from these diseases in the United States and Canada, based on observational studies combined with a randomized trial. Such intakes also are expected to reduce case-fatality rates of patients who have breast, colorectal, or prostate cancer by half. There are no unreasonable risks from intake of 2000 IU per day of vitamin D(3), or from a population serum 25(OH)D level of 40 to 60 ng/mL. The time has arrived for nationally coordinated action to substantially increase intake of vitamin D and calcium.
Matti Narkia

SI Units for Clinical Data - conversion factors - 0 views

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    The following table provides factors for converting conventional units to SI units for selected clinical data. Source: JAMA Author Instructions. Contains also conversion factors for circulating form of vitamin D, 25(OH)D (calcidiol).
Matti Narkia

MedWire News - Oncology - Serum 25(OH)D levels linked to prostate cancer prognosis - 0 views

  • The researchers conclude: “This study shows a strong association between 25(OH)D levels and cause-specific mortality in patients with prostate cancer. The strength of the association indicates that prostate cancer patients can benefit from increasing the level of serum 25(OH)D if it is below 50 nmol/l.”
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    MedWire News: Serum levels of 25-hydroxy vitamin D (25(OH)D) play a role in prostate cancer disease progression and are a potential prognostic indicator, Norwegian study findings suggest.
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