Vitamin D

"Lääkäri Hannu Vierolan mielestä suomalaisten D-vitamiinin puute alkaa olla hälyttävällä tasolla. Ruokavaliosta tai ympäristöstä kesällä saatu vitamiinimäärä ei riitä syksyllä edes isänpäivään saakka. Iisalmelaislääkäri Hannu Vierola on työnsä kautta päätynyt tutkimaan potilaidensa D-vitamiinin määriä. Tulokset ovat olleet hälyttäviä, esimerkiksi 15-vuotiaista tytöistä joka viides on lähestulkoon riisitaudin partaalla. D-vitamiinin vajaus koskee kuitenkin myös kaikkia muita ikäluokkia ja molempia sukupuolia. Kriisiryhmiä ovat nuoret ja vanhukset sekä laktoosi-intoleranssia ja keliakiaa potevat. D-vitamiinin puute aiheuttaa lukuisia puutostiloja. Matala D-vitamiini lisää Vierolan mukaan mm. syöpäriskiä, luun haurastumista, diabetesta, verenpainetautia, MS-tautia ja influenssaa.Vitamiinin lisääminen ruokavalioon vähentää nivel- ja lihassärkyjä, kohentaa lihasvoimaa, mielialaa ja karkoittaa väsymystä."

Depression is associated with decreased 25-hydroxyvitamin D and increased parathyroid hormone levels in older adults. Hoogendijk WJ, Lips P, Dik MG, Deeg DJ, Beekman AT, Penninx BW. Arch Gen Psychiatry. 2008 May;65(5):508-12. PMID: 18458202 Conclusion The results of this large population-based study show an association of depression status and severity with decreased serum 25(OH)D levels and increased serum PTH levels in older individuals.

Vitamin D supplement in early childhood and risk for Type I (insulin-dependent) diabetes mellitus. The EURODIAB Substudy 2 Study Group. [No authors listed] Diabetologia. 1999 Jan;42(1):51-4. PMID: 10027578 DOI: 10.1007/s001250051112 In conclusion, this large multicentre trial covering many different European settings consistently showed a protective effect of vitamin D supplementation in infancy. The findings indicate that activated vitamin D might contribute to immune modulation and thereby protect or arrest an ongoing immune process initiated in susceptible people by early environmental exposures.

Vitamin D receptor gene polymorphisms influence susceptibility to type 1 diabetes mellitus in the Taiwanese population. Chang TJ, Lei HH, Yeh JI, Chiu KC, Lee KC, Chen MC, Tai TY, Chuang LM. Clin Endocrinol (Oxf). 2000 May;52(5):575-80. PMID: 10792336 DOI: 10.1046/j.1365-2265.2000.00985.x CONCLUSIONS Vitamin D receptor gene polymorphisms were associated with type 1 diabetes in a Taiwanese population. However, functional studies are needed to establish the role of the vitamin D receptor in the pathogenesis of type 1 diabetes mellitus.

Vitamin D receptor allele combinations influence genetic susceptibility to type 1 diabetes in Germans. Pani MA, Knapp M, Donner H, Braun J, Baur MP, Usadel KH, Badenhoop K. Diabetes. 2000 Mar;49(3):504-7. PubMed PMID: 10868975. doi: 10.2337/diabetes.49.3.504

Vitamin D and mood disorders among women: an integrative review. Murphy PK, Wagner CL. J Midwifery Womens Health. 2008 Sep-Oct;53(5):440-6. Review. PMID: 18761297 Four of six studies reviewed imparted significant results, with all four showing an association between low 25(OH)D levels and higher incidences of four mood disorders: premenstrual syndrome, seasonal affective disorder, non-specified mood disorder, and major depressive disorder. This review indicates a possible biochemical mechanism occurring between vitamin D and mood disorders affecting women, warranting further studies of these variables using rigorous methodologies.

Effects of vitamin D supplementation on symptoms of depression in overweight and obese subjects: randomized double blind trial. Jorde R, Sneve M, Figenschau Y, Svartberg J, Waterloo K. J Intern Med. 2008 Dec;264(6):599-609. Epub 2008 Sep 10. PMID: 18793245 Conclusions. It appears to be a relation between serum levels of 25(OH)D and symptoms of depression. Supplementation with high doses of vitamin D seems to ameliorate these symptoms indicating a possible causal relationship.

Association between depressive symptoms and 25-hydroxyvitamin D in middle-aged and elderly Chinese. Pan A, Lu L, Franco OH, Yu Z, Li H, Lin X. J Affect Disord. 2009 Nov;118(1-3):240-3. Epub 2009 Feb 27. PMID: 19249103 doi:10.1016/j.jad.2009.02.002 Conclusions Depressive symptoms are not associated with 25(OH)D concentrations in middle-aged and elderly Chinese. Further prospective studies are required to determine whether they are correlated.

Correlation of symptoms with vitamin D deficiency and symptom response to cholecalciferol treatment: a randomized controlled trial. Arvold DS, Odean MJ, Dornfeld MP, Regal RR, Arvold JG, Karwoski GC, Mast DJ, Sanford PB, Sjoberg RJ. Endocr Pract. 2009 May-Jun;15(3):203-12. PMID: 19364687 Conclusions: Compared with participants in the placebo group, patients in the treatment group showed mild short-term improvement in the overall fibromyalgia impact score, but did not show significant improvement in most musculoskeletal symptoms or in activities of daily living.

Vitamin D deficiency is associated with worse cognitive performance and lower bone density in older African Americans. Wilkins CH, Birge SJ, Sheline YI, Morris JC. J Natl Med Assoc. 2009 Apr;101(4):349-54. PMID: 19397226 CONCLUSIONS: Vitamin D deficiency in older African Americans was associated with worse cognitive performance and lower BMD of the hip

Association between 25-hydroxyvitamin D levels and cognitive performance in middle-aged and older European men. Lee DM, Tajar A, Ulubaev A, Pendleton N, O'Neill TW, O'Connor DB, Bartfai G, Boonen S, Bouillon R, Casanueva FF, Finn JD, Forti G, Giwercman A, Han TS, Huhtaniemi IT, Kula K, Lean ME, Punab M, Silman AJ, Vanderschueren D, Wu FC; EMAS study group. J Neurol Neurosurg Psychiatry. 2009 Jul;80(7):722-9. Epub 2009 May 21. PMID: 19460797 doi:10.1136/jnnp.2008.165720 Conclusion: In this study, lower 25(OH)D levels were associated with poorer performance on the DSST. Further research is warranted to determine whether vitamin D sufficiency might have a role in preserving cognitive function in older adults.

Vitamin D and depressive symptoms in women during the winter: a pilot study. Shipowick CD, Moore CB, Corbett C, Bindler R. Appl Nurs Res. 2009 Aug;22(3):221-5. PMID: 19616172 doi:10.1016/j.apnr.2007.08.001 ESULTS: Vitamin D supplementation was associated not only with an increase in the serum D levels by an average of 27 ng/ml but also with a decline in the BDI-II scores of an average of 10 points. DISCUSSION: This study suggests that supplemental vitamin D3 reduces depressive symptoms.

Association of vitamin D deficiency with cognitive impairment in older women. Cross-sectional study. Annweiler C, Schott AM, Allali G, Bridenbaugh SA, Kressig RW, Allain P, Herrmann FR, Beauchet O. Neurology. 2009 Sep 30. [Epub ahead of print] PMID: 19794127 doi:10.1212/WNL.0b013e3181beecd3 Conclusions: 25-Hydroxyvitamin D deficiency was associated with cognitive impairment in this cohort of community-dwelling older women.

Vitamin D replacement in Asians with diabetes may increase insulin resistance. Taylor AV, Wise PH. Postgrad Med J. 1998 Jun;74(872):365-6. PMID: 9799895 We report three cases of vitamin D replacement in British Asians with vitamin D deficiency and non-insulin-dependent diabetes mellitus. In all cases, replacement resulted in an increase in insulin resistance and a deterioration of glycaemic control

"For more than 80 years, scientists have known that vitamin D is important for building bones. And for most of those 80 years, people thought this was the only thing it was good for. In the past decade, however, we've learned two important things about vitamin D: it appears to have many other important health effects, and many Americans don't get enough of it. In 2008, new research pointed to a vitamin D deficiency as a possible contributing factor in heart disease. And the suspected link between vitamin D deficiency and cancer grew even stronger. This surely will spur much new research in 2009. Why is vitamin D deficiency so common? The vitamin is made in our skin when sunlight strikes it. Many Americans-especially those who live in the northern part of the country, are elderly or have dark skin-don't soak up enough sun. And the vitamin isn't found in many foods. The main sources are fatty fish (such as salmon, mackerel, herring and sardines) and milk, cereal and juices that have been fortified with it. Vitamin D deficiency often is unsuspected because it causes no direct symptoms; like high blood pressure, it does its damage silently."

Is a lower dose of vitamin D supplementation enough to increase 25(OH)D status in a sunny country? Pignotti GA, Genaro PS, Pinheiro MM, Szejnfeld VL, Martini LA. Eur J Nutr. 2009 Nov 28. [Epub ahead of print] PMID: 19946776 CONCLUSION: The dose given (400 IU/day) was not enough to achieve 25(OH)D concentration, considered optimal for bone health.

"Let's shine some sunlight on these knowledge deficiencies: * Serum vitamin D levels have been dropping (as chronic inflammation has been increasing) over the last three decades -- has something changed in our diets? * Vitamin D deficiencies occur globally (not restricted to Northern latitudes or winter) -- related to diet? * Women are more vulnerable, because of cultural modesty in some countries, but males are still D-deficient. * A subset of people exposed to ample sunshine are still D-deficient. * Vitamin D deficient individuals also have elevated TNF. * Vitamin D deficiency and inflammation are risk factors in the same diseases. It seems that the simplest conclusion is that chronic inflammation leads to vitamin D deficiency, even though vitamin D deficiency may also contribute to inflammation."

"Tiedämme, että auringon puute aiheuttaa myös D-vitamiinin puutoksen. Englantilainen lääkäri David Grimes väittää Aftonbladetin mukaan, että D-vitamiinin puute voi aiheuttaa myös sydäntauteja. - Sydäntautien riskiä eivät lisää epäterveelliset ruokavaliot tai korkea kolesteroli, vaan asuinpaikka, Grimes sanoo. Grimes on pakertanut 20 vuoden ajan tutkimuksensa parissa. Nyt siitä on tehty kirja. Siinä tohtori Grimes väittää, että mitä korkeampi D-vitamiinipitoisuus veressä on, sitä pienempi on sydäntautien riski."

"Olmesartan (trade names Benicar, Olmetec) is an angiotensin II receptor antagonist used to treat high blood pressure. The prodrug olmesartan medoxomil is marketed worldwide by Daiichi Sankyo, Ltd. and in the United States by Daiichi Sankyo, Inc. and in India by Ranbaxy Laboratories Ltd. under the trade name Olvance. Olmesartan may possess high affinity for the Vitamin D Receptor, based on molecular modeling studies[2], but these results have not been duplicated in clinical trials. Because of the role of the Vitamin D receptor in innate immunity[3], this would indicate that olmesartan has immune modulatory properties. This theory is currently the premise underlying the Marshall Protocol, which uses olmesartan to impose a chemical blockade on 1,25 Vitamin D as part of a treatment of sarcoidosis and other diseases. The Marshall Protocol asserts that, assuming the etiology of these diseases is based on infection by cell-wall-deficient bacteria, restoring proper Vitamin D ratios via olmesartan dosing, combined with pulsed antibiotic dosing, would result in a cure.!

"D-vitamiinin saantisuositus moninkertaistettava Kansainvälinen paine D-vitamiinin saantisuosituksen korottamiseksi kasvaa. Suomessa viranomaissuositus aikuisille on 7,5 mikrogrammaa. Kalifornian yliopiston 18-henkinen tiedemiesryhmä vaatii suosituksen nostamista 2000 kansainväliseen yksikköön eli 50 mikrogrammaan. Suiomessa Pekka Puska haraa vastaan. Tohtori Anthony W. Norman ja hänen tiedemiesryhmänsä kutsuvat maailman muita tutkijoita toimiin ("call to action") aikuisten ihmisten D-vitamiinin saantisuosituksen nostamiseksi 50 mikrogrammaan päivässä. Normanin laatima pääkirjoitus D-vitamiinista julkaistiin joulukuun American Journal of Nutritionissa (linkki lopussa). "Päättäjien on syytä perehtyä tieteellisiin tutkimuksiin, jotka puoltavat suosituksen nostamista", sanoo tiedemiesryhmä. Se suosittelee elintarvikkeiden rikastamista D-vitamiinilla ja D-vitamiinin käyttöä ravintolisänä. Yhdysvalloissa viranomaissuositus on alle 50-vuotiaille aikuisille 5 µg, 51-70 -vuotiaille 10 µg ja yli 70-vuotiaille 15 µg. Suomessa suositus on 7,5 µg alle 60-vuotiaille ja 10 µg sitä vanhemmille. "Amerikkalaiset tiedemiehet allekirjoittivat lausunnon, jonka mukaan aikuisen [amerikkalaisen] ihmisen D3-vitamiinin tarve on 2000 kansainvälistä yksikköä [eli 50 mikrogrammaa] vuorokaudessa", sanoo Norman. "Suositeltu annos on täysin turvallinen", hän korostaa ja viittaa Yhdysvaltain tiedeakatemian (National Academy of Sciences) lausuntoon."