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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

D-vitamiinikeskustelu sfnet.keskustelu.terveys -ryhmässä vuodelta 2005. Mukana mm. Matti Narkia ja Juhana Harju. Osa 1

D-vitamiinikeskustelu sfnet.keskustelu.terveys -ryhmässä vuodelta 2005. Mukana mm. Matti Narkia ja Juhana Harju. Osa 2

D-vitamiinikeskustelu sfnet.keskustelu.terveys -ryhmässä vuodelta 2005. Mukana mm. Matti Narkia ja Juhana Harju. Osa 3

Table of Contents Ch. I Is calcidiol an active hormone? 1 Ch. II Vitamin D as a neurosteroid hormone : from neurobiological effects to behavior 29 Ch. III Inhibitors of vitamin D hydroxylases : mechanistic tools and therapeutic aspects 67 Ch. IV Vitamin D analogues as anti-cancer therapies 145 Ch. V Paricalcitol : a vitamin D2 analog with anticancer effects with low calcemic activity 169 Ch. VI Vitamin D use among older adults in U.S. : results form national surveys 1997 to 2002 181 Ch VII Vitamin D deficiency in migrants 199 Vitamin D is a fat-soluble steroid hormone precursor that contributes to the maintenance of normal levels of calcium and phosphorus in the bloodstream. Strictly speaking, it is not a vitamin since human skin can manufacture it, but it is referred to as one for historical reasons. It is often known as calciferol. The major biologic function of vitamin D is to maintain normal blood levels of calcium and phosphorus. Vitamin D aids in the absorption of calcium, helping to form and maintain strong bones. It promotes bone mineralisation in concert with a number of other vitamins, minerals and hormones. Without vitamin D, bones can become thin, brittle, soft or misshapen. Vitamin D prevents rickets in children and osteomalacia in adults -- skeletal diseases that result in defects that weaken bones. This book gathers international research on the leading-edge of the scientific front.

D-vitamiinin turvallisuutta tarkasteltaessa pitää huomioida ainakin seuraavat kaksi asiaa: 1) Nykyiset saantisuositukset ja turvallisuurajat ovat aivan liian pieniä, kts. Viethin tutkimukset ja esim. Merckin manuaalista "Vitamin D toxicity". 2) On olemassa näyttöä siitä, että nykyisenkaltaisten suositusten seuraaminen voi altistaa tietyille kroonisille taudeille monia yksilöitä, joiden auringonvalon saanti on syystä tai toisesta rajoitettu (talvisaika 40 leveyasteiden ulkopuolella, liian peittävä vaatetus (musliminaiset) jne..). Tällaisia tauteja ovat mm. tyypin 1 diabetes, multippeli skleroosi ja muut autoimmuunisairaudet, monet syövät (eturauhassyövästä on aika hyvää näyttöä), reuma, osteoporoosi, korkea verenpaine, kaamosmasennus, jne .... Jättiannokset ovat myrkyllisiä, mutta liian vähäinen saantikin voi olla huomattava turvallisuusriski.

Contains information how to convert serum 25(OH)D (calcidiol) concentration units nmol/l to ng/ml and vice versa.

Food chain as origin of vitamin D in fish D. Sunita Rao and N. Raghuramulu. Comparative Biochemistry and Physiology Part A: Physiology Volume 114, Issue 1, May 1996, Pages 15-19 doi:10.1016/0300-9629(95)02024-1 Plankton, the chief food source of fish, was assessed as the possible dietary origin of vitamin D in fish. The presence of vitamin D compounds were examined in fresh water phytoplankton and zooplankton employing a series of chromatographic procedures. Abundant amounts of provitamins D and vitamins D (D2 and D3) were found in the fresh water plankton. The high amount of vitamin D observed may be due to exposure of plankton to sunlight because the plankton were caught during the summer month. Thus, plankton may be an important contributor to vitamin D in fish.

Pekka J Nykänen Helsingin ympäristön reumatoimisto Tässä yhteenvedossa tarkastelen D-vitamiinin sekä kalsiumin merkitystä lähinnä luuston hyvinvoinnin kannalta.

Vitamin D related usenet messages by Steven B. Harris and Reinhold Vieth

Vitamin D3 and 25-hydroxyvitamin D3 in raw and cooked pork cuts. Ina Clausen, Jette Jakobsen, Torben Leth and Lars Ovesen. Journal of Food Composition and Analysis Volume 16, Issue 5, October 2003, Pages 575-585 doi:10.1016/S0889-1575(03)00064-4 Meat 25OHD3 contributes significantly to vitamin D activity. Food databases should include concentrations of both vitamin D and 25OHD.