Vetenskapsradion: ”Somaliska kvinnor i Stockholmstrakten har mycket lägre halter D-vitamin jämfört med etniskt svenska kvinnor, och den allvarliga vitaminbristen överförs till deras barn, möjligen med autism som komplikation.”
Svenska myndigheter är skitnödiga i den här frågan. Den officiella linjen är ungefär att ingen lider brist på vitamin D i Sverige, inte ens under vintern.
Att invandrade kvinnor som går täckta från topp till tå oftare föder barn med autism är ingen ny nyhet. Enligt Socialstyrelsen och Strålsäkerhetsmyndigheten gör de helklädda invandrarkvinnorna allt rätt, men har ändå allvarlig vitamin D-brist och får mycket oftare barn som är autistiska. Hur tänker man? Vad ska man göra åt det? Förmodligen ingenting, och läkarna får väl börja förskriva vitamin D till den här gruppen även om de nivåer som är ”state of the art” är så löjligt låga att de knappt skyddar mot Rickets.
Se speciellt Vitamin D Theory of Autism (ännu mer här) och Sunscreen and Low-fat Diet: A Recipe for Disaster.
For the first time, probably, the effect of Vitamin D on seasonal influenza has been studied in a controlled randomized trial. In a recent Japanese study, school children were given 1200 IU of Vitamin D3 daily, or a placebo, during the winter, from December 2008 through March 2009. Influenza A occurred in 18 of 167 (10.8%) children in the vitamin D3 group compared with 31 of 167 (18.6%) children in the placebo group.
We are still waiting for the results of a study launched by The Public Health Agency of Canada (PHAC), where the the role of vitamin D in protection against swine flu, is studied. As far as I can see, there is no information available about this study at the PHAC web site or that of the McMaster University, and the only information available is that in a letter sent to NutraIngredients-USA in August 2009.
Update: Dr Briffa; Vitamin D supplementation found to help prevent flu in children
Image: Early Stories
From a public release and summary on March 7 of a forthcoming article in Nature Immunology; Vitamin D controls T cell antigen receptor signaling and activation of human T cells, by Carsten Geisler et al of the University of Copenhagen:
Scientists at the University of Copenhagen have discovered that Vitamin D is crucial to activating our immune defenses and that without sufficient intake of the vitamin, the killer cells of the immune system – T cells – will not be able to react to and fight off serious infections in the body.
Caption: When the naïve T cell recognizes foreign molecules with its T cell receptor (TCR) it sends activation signals (1) to the VDR gene. The VDR gene now starts the production of VDR (2). VDR binds vitamin D in the T cell (3) and becomes activated. Vitamin D bound to activated VDR goes back into the cell nucleus and activates the gene for PLC-gamma1 (5). PLC-gamma1 is produced (6) and the T cells can get started.
Professor Carsten Geisler from the Department of International Health, Immunology and Microbiology explains that ”when a T cell is exposed to a foreign pathogen, it extends a signaling device or ‘antenna’ known as a vitamin D receptor, with which it searches for vitamin D. This means that the T cell must have vitamin D or activation of the cell will cease. If the T cells cannot find enough vitamin D in the blood, they won’t even begin to mobilize. ”
Telegraph.co.uk; Vitamin D ‘triggers and arms’ the immune system
Scientific Amercan; Another reason vitamin D is important: it gets T cells going
Wikipedia; Immune System
Köbenhavns Universitet: D-vitamin er helt afgørende for immunforsvaret
The new Vitamin D Newsletter from the Vitamin D Council is certainly a scary read: Vitamin D Deficiency Rickets: Another Shattered Family.
The prevailing ignorance about vitamin D deficiency among doctors is really astonishing, considering that the medical literature is full of articles on the subject, and that you can even read about it in many ordinary news papers. In the present newsletter Dr Canell discusses the results of a recent study carried out in the UK:
About one-third of the fetuses in England have evidence of intrauterine rickets, as evidenced by the classic finding of splaying or flaring at the end of the femur. They found splaying was common in fetuses whose mothers had vitamin D levels less than 20 ng/mL, and even saw a suggestion of splaying with levels less than 30 ng/mL. Only about 1/3 of the pregnant women in the United States have levels above 30 ng/mL.
Neglectful parents can rightfully be sent to jail for child abuse. But sometimes ignorant doctors contribute to having innocent parents sent to jail and having their children taken away from them. Doctors should do no harm, but practicing ignorance is just that.