D-vitamiini voi olla tehokas sikainfluenssan ehkäisemiseen sekä hoitamiseen. Paras ja suurin D-vitamiinilähde on auringonvalo, mutta syksyllä ja talvella sitä ei ole yhtä paljon saatavilla, varsinkaan Suomessa. Tosin muitakin lähteitä löytyy, kuten kala, kalanmaksaöljy, margariini, kananmuna keltuaine ja D-vitamiinitabletteja.
D-vitamiini on itseasiassa hormoni ja sen yliannostus voi aiheuttaa haittavaikutuksia. Suomessa saantisuositus on 7.5µg (mikrogrammaa), mutta tietojeni mukaan aikuiset voivat ottaa jopa 1000µg päivässä parin viikon ajan ilman haittavaikutuksia. Tosin 100-125µg eli 4000-5000IU (international units) on tarpeeksi influenssan ja jopa sikainfluenssan ehkäisemiseen. Lapsille annostus pitää olla pienempi, 50µg eli 2000IU, riippuen lapsen iästä ja painosta. D-vitamiinin syömistä ravinnelisänä ei suositella niille jotka sairastavat jotain tautia mikä vaikuttaa munuaisten toimintaan.
Canada Examines Vitamin D For Swine Flu Protection
NutraIngredients-USA.comThe Public Health Agency of Canada (PHAC) has confirmed that it will be investigating the role of vitamin D in protection against swine flu, NutraIngredients-USA.com has learned.
The agency started a study last year on the role of vitamin D in severe seasonal influenza, which it said it will now adapt to the H1N1 swine flu virus.
“Researchers in PHAC are working with colleagues at McMaster University and with partners at other universities and hospitals to determine whether there is a correlation between severe disease and low vitamin D levels and/or a person’s genetic make up. This line of research in seasonal influenza will be adapted to H1N1,” wrote the agency in an e-mail to NutraIngredients-USA.com.
PHAC said it is testing serum samples to examine this possibility in collaboration with colleagues at the University of Toronto.
Preventing ‘severe outcomes’
Part of the researchers’ goal is to understand if vitamin D levels are in any way responsible for the fact that most people with seasonal influenza develop a mild illness but a small minority go on to develop severe symptoms.
According to PHAC, results from its study will indicate the extent and nature of the role of vitamin D in sever seasonal influenza. The agency said it would most likely take at least three influenza seasons to be able to recruit a sufficient sample size of individuals with severe disease and controls before the results can be “meaningfully” analyzed.
“If we find that there is a correlation between severe disease and vitamin D levels we shall, with our partners in the future, conduct randomized controlled studies to determine whether vitamin D can be used as a means to mitigate severe seasonal influenza,” it said.
Vitamin D and H1N1 Swine Flu
Vitamin D CouncilThis is an announcement to alert readers to a crucial email I received from a physician who has evidence vitamin D is protective against H1N1. I ask you, the reader, to contact your representatives in Washington to help protect Americans, especially children, from H1N1 before winter comes.
Dr. Cannell:
Your recent newsletters and video about Swine flu (H1N1) prompted me to convey our recent experience with an H1N1 outbreak at Central Wisconsin Center (CWC). Unfortunately, the state epidemiologist was not interested in studying it further so I pass it on to you since I think it is noteworthy.
CWC is a long-term care facility for people with developmental disabilities, home for approx. 275 people with approx. 800 staff. Serum 25-OHD has been monitored in virtually all residents for several years and patients supplemented with vitamin D.
In June, 2009, at the time of the well-publicized Wisconsin spike in H1N1 cases, two residents developed influenza-like illness (ILI) and had positive tests for H1N1: one was a long-term resident; the other, a child, was transferred to us with what was later proven to be H1N1.
On the other hand, 60 staff members developed ILI or were documented to have H1N1: of 17 tested for ILI, eight were positive. An additional 43 staff members called in sick with ILI. (Approx. 11–12 staff developed ILI after working on the unit where the child was given care, several of whom had positive H1N1 tests.)
So, it is rather remarkable that only two residents of 275 developed ILI, one of which did not develop it here, while 103 of 800 staff members had ILI. It appears that the spread of H1N1 was not from staff-to-resident but from resident-to-staff (most obvious in the imported case) and between staff, implying that staff were susceptible and our residents protected.
Sincerely,
Norris Glick, MD
Central Wisconsin Center
Madison, WIThis is the first hard data that I am aware of concerning H1N1 and vitamin D. It appears vitamin D is incredibly protective against H1N1. Dr. Carlos Carmago at Mass General ran the numbers in an email to me. Even if one excludes 43 staff members who called in sick with influenza, 0.73% of residents were affected, as compared to 7.5% of staff. This 10-fold difference was statistically significant (P<0.001). That is, the chance that this was a chance occurrence is one less than one in a thousand.
Second, if you read my last newsletter, you will see that children with neurological impairments, like the patients at your hospital, have accounted for 2/3 of the childhood deaths for H1N1 so far in the USA. That is, the CDC knows, because they reported it, that patients with neurological impairments are more likely to die from H1N1.
Lähde: NutraIngredients-USA.com, Vitamin D Council
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Tagit: d, d-vitamiini, h1n1, sikainfluenssa, vitamiini, vitamin d