How Much Vitamin D?

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Below is the May 2009 Vitamin D Council Newsletter.

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Cannell, MD

Vitamin D Council Newsletter

May 16, 2009

I have received hundreds of emails from readers, asking what they should do

about the possibility of an H1N1 flu pandemic.

Dear Dr. Cannell:

1. Should I take Vitamin D to prevent the H1N1 flu? If so, how much?

2. What role did Vitamin D play in the 1918 pandemic?

3. If I get this flu, should I take very high doses of vitamin D? Is so, how

much?

4. Should I take the special flu vaccine the CDC and others are developing?

5. What are you going to do for your family about the 2009 flu?

6. Why do the CDC and NIH ignore the Vitamin D studies?

The Public, USA

Dear Public:

First read what I have written about influenza. Both papers can be downloaded

and printed out in their entirety:

Cannell JJ, Zasloff M, Garland CF, Scragg R, Giovannucci E. On the epidemiology

of influenza. Virol J. 2008 Feb 25;5:29.

Cannell JJ, Vieth R, Umhau JC, Holick MF, Grant WB, Madronich S, Garland CF,

Giovannucci E. Epidemic influenza and vitamin D. Epidemiol Infect. 2006

Dec;134(6):1129-40.

My short executive answers:

1) Take enough Vitamin D3 to get your 25(OH)D level above substrate

starvation levels (50 ng/ml or 125 nmol/L). Levels of 50 ng/ml usually require

at least 5,000 IU per day for adults, some adults will require more. Children

should take 1,000 IU per every 25 pounds of body weight. After taking this dose

for 3 months have a 25(OH)D level. Individual variation in dose response is

great and natural 25(OH)D levels (50-70 ng/ml) are not assured by these doses.

For reasons I will discuss below, I think it possible that Vitamin D levels of

30 ng/ml, which are often obtained by people taking low doses of Vitamin D

(1,000 to 2,000 IU/day), may increase your risk of death from a 1918-like

influenza virus.

2) It is clear to me that Vitamin D did not play a controlling role in 1918.

The lethality of the 1918 virus easily overwhelmed innate immunity although I am

unwilling to impair my innate immunity by taking inadequate doses of Vitamin D.

3) Stock you homes pharmacy with several fresh bottles of 50,000 IU capsules

of Vitamin D3, a medicine, not a supplement, and if you get this flu, take

2,000 IU per kg of body weight per day for a week. As I weigh 220 pounds, I

would take 200,000 IU per day for seven days if I thought I had an infection

with a 1918-like influenza virus.

4) Get the H1N1 flu shot as soon as it is available in the fall, especially if

the virus shows evidence of lethality this summer in the southern hemisphere,

For reasons I will discuss, a flu shot probably will not generate an immune

response in people with 25(OH)D levels above 50 ng/ml but that is simply

conjecture. That is, the flu shot may not work, may not generate antibodies, in

people with 25(OH)D levels above 50 ng/ml. In my opinion, the risk of a lethal

virus is higher than the risk of Guillain-Barré Syndrome. In fact, the risk of

Guillain-Barré Syndrome is probably the highest in non-vaccinated people who are

infected with the virus and quite low in those who take a modern flu vaccine.

5) Besides the above actions, stock up on TamiFlu in your home medicine

cabinet so you have it next fall and winter. And follow common-sense

precautions, especially frequent hand washing.

6) Most medically trained physicians, scientists or practitioners think in

terms of something bad causing illness, not something good preventing it. Ask

any physician what Bernard Shaw meant when he said, the characteristic

microbe of a disease might be a symptom instead of a cause. The idea that

seasonal influenza or the common cold is a symptom, even the presence of the

virus itself being a symptom of an underlying condition, is foreign to modern

medical thought. Influenza researchers at the CDC and NIH think only in terms

of vaccines and anti-virals, mainly because most of them have such strong

economic affiliations with some aspect of the influenza industry. The idea of

diagnosing and treating Vitamin D deficiency as one part of influenza

preparedness is simply foreign to them. Unfortunately, their attitude

contributes to the 36,000 deaths every year in the USA from seasonal influenza

and leaves American's innate immune system naked in facing a pandemic.

Detailed answers:

Again, for me to fully answer your questions, and for you to understand my

reasoning, the first thing you need to do is to read the articles I have written

about influenza. Neither article is about pandemic influenza, rather epidemic

influenza. Both are full access articles.

Cannell JJ, Zasloff M, Garland CF, Scragg R, Giovannucci E. On the epidemiology

of influenza. Virol J. 2008 Feb 25;5:29.

Cannell JJ, Vieth R, Umhau JC, Holick MF, Grant WB, Madronich S, Garland CF,

Giovannucci E. Epidemic influenza and vitamin D. Epidemiol Infect. 2006

Dec;134(6):1129-40.

Next is to read additional papers on our website. We have attempted to get full

copies of the most important articles when possible:

Vitamin D Council/Science/Influenza

The WHO reports:

" H1N1 appears to be more contagious than seasonal influenza. The secondary

attack rate of seasonal influenza ranges from 5% to 15%. Current estimates of

the secondary attack rate of H1N1 range from 22% to 33%. With the exception of

the outbreak in Mexico, which is still not fully understood, the H1N1 virus

tends to cause very mild illness in otherwise healthy people. Outside Mexico,

nearly all cases of illness, and all deaths, have been detected in people with

underlying chronic conditions.

In the two largest and best documented outbreaks to date, in Mexico and the

United States, a younger age group has been affected than seen during seasonal

epidemics of influenza. Though cases have been confirmed in all age groups, from

infants to the elderly, the youth of patients with severe or lethal infections

is a striking feature of these early outbreaks. In terms of population

vulnerability, the tendency of the H1N1 virus to cause more severe and lethal

infections in people with underlying conditions is of particular concern. "

Virologists are concerned with three aspects of any influenza virus: (1)

novelty, (2) transmissibility, (3) lethality. The current H1N1 is novel, that

is, we have no antibodies to this strain. Its transmissibility is high but its

lethality (percent who die after infection) is still low, except in Mexico. Why

it was so lethal in Mexico, no one knows. Will that lethality return as the

virus mutates this summer? Keep in mind that the lethality of the 1918 flu was

high, perhaps a billion people infected, a half billion became ill, and, at the

most, one tenth of a billion died. Until the 2009 virus exposes its lethality,

and it may not do so until next fall or winter, we are all playing an

involuntary game of Russian roulette.

Pandemics imply widespread infection thus transmissibility, but do not specify

the virus's lethality. However, this virus was transmitted in May, near the

equator, at 7,000 feet altitude. May is the time influenza transmission usually

stops because population 25(OH)D levels are rising quickly. Lethality of

influenza viruses change over short periods of time (weeks to months).

That is, the WHO and CDC have no way of knowing if this virus will acquire

lethality. Lethality is how quickly this virus will bore holes in your lung

cells, hijack that cells genetic machinery, burst the cell, and spew out

hundreds of thousands of swarming viruses to do the same thing to the next

respiratory cell, perhaps triggering a cytokine storm response by your body's

immune system that quickly strips your lungs of the cells you need to breath.

If that does not kill you within a few days, it leads to pneumonia, the " Captain

of the Men of Death, " who finishes the job in a few weeks. Some viruses, even

novel ones, even novel pandemic ones, are not very lethal. The 1918 virus was

an expert driller and was thus highly lethal, but it was its transmissibility

combined with lethality that lead to the massive deaths. It was able to

eventually infect about half the world, maybe more; its combined lethality and

transmissibility showed itself during its second wave, the autumn wave of 1918.

The Asian pandemic of 1957 started mild, and returned in a somewhat more severe

form the following winter. The 1968 Hong Kong pandemic began relatively mild and

remained mild in its second winter wave in most countries.

Dear Dr. Cannell:

How does Vitamin D work in the immune system?

Philip, Texas

Dear Philip:

Two systems exist in your body to fight infections, the innate or immediate

system and the acquired or adaptive immune system that makes antibodies. Recent

evidence indicates seasonal impairments of the antimicrobial peptide (AMPs)

systems are crucial to impaired innate immunity, impairments caused by seasonal

fluctuations in 25-hydroxy-vitamin D [25(OH)D] levels. The evidence that

vitamin D has profound effects on innate immunity is rapidly growing.

Janet Raloff. The Antibiotic Vitamin, Science News

Unlike adaptive immunity, innate immunity is that branch of host defense that is

" hard-wired " to respond rapidly to infections using genetically encoded

effectors that are ready for activation by an antigen before the body has ever

encountered that antigen. Of the effectors, the best studied are the

antimicrobial peptides (AMPs).

Both epithelial tissues and white blood cells produce AMPs; they exhibit rapid

and broad-spectrum antimicrobial activity against bacteria, fungi, and viruses.

In general, they act by rapidly and irreversibly damaging the lipoprotein

membranes of microbial targets, including enveloped viruses, like influenza.

Antimicrobial peptides protect mucosal epithelial surfaces by creating a hostile

antimicrobial barricade. The epithelia secrete them constitutively into the thin

layer of fluid that lies above the apical surface of the epithelium but below

the viscous mucous layer. To effectively access the epithelium, a microbe must

first infiltrate the mucous barrier and then survive assault by the AMPs present

in this fluid. Should microbes breach this constitutive cordon, their binding to

the epithelium rapidly mobilizes the expression of high concentrations of

specific inducible AMPs, which provide a backup antimicrobial shield.

The crucial role of vitamin D in the innate immune system was discovered only

very recently. Both epithelial cells and macrophages increase expression of the

antimicrobial cathelicidin upon exposure to microbes, an expression that is

dependent upon the presence of vitamin D. Pathogenic microbes stimulate the

production of an enzyme that converts 25(OH)D to 1,25(OH)2D, a seco-steroid

hormone. This in turn rapidly activates a suite of genes involved in pulmonary

defense.

In the macrophage, the presence of vitamin D also appears to suppress the

pro-inflammatory cytokines. Thus, vitamin D appears to both enhance the local

capacity of the epithelium to produce endogenous antibiotics and at the same

time dampen certain destructive arms of the immune response, especially those

responsible for the signs and symptoms of acute inflammation, such as the

cytokine storms operative when influenza kills quickly.

Because humans obtain most vitamin D from sun exposure and not from diet, a

varying percentage of the population is vitamin D deficient, at any time, during

any season, at any latitude, although the percentage is higher in the winter, in

the aged, in the obese, in the sun-deprived, in the dark-skinned, and in more

poleward populations. However, seasonal variation of vitamin D levels even occur

around the equator and widespread vitamin D deficiency can occur at equatorial

latitudes, probably due to sun avoidance, rainy seasons, and air pollution.

For example, a study of Hong Kong infants showed about half had 25(OH)D levels

less than 20 ng/ml in the winter. Even in the summer, few of the infants had

levels higher than 30 ng/ml, which many experts now think is well below the

lower limit of the optimal range. As 25(OH)D levels affect innate immunity, then

a varying percentage of most populations even equatorial ones will have impaired

innate immunity at any given time, together with distinct seasonal variations in

that percentage. The effects such impairments have on influenza transmission are

unknown.

Dear Dr. Cannell:

Will Vitamin D protect me against acquiring the H1N1 flu?

, Utah

Dear :

I don't know; no one does. I am concerned about people who take low doses of

Vitamin D (1,000 - 2,000 IU/day) and only achieve a 25(OH)D blood level of 30

ng/ml. If the virus mutates into a virus as lethal as the 1918 virus, I doubt

Vitamin D will totally protect you. Several facts about the 1918 pandemic

concern me.

1. Blacks were less likely to contract the flu or die from the flu than whites

in 1918.

2. Young people, presumably with the highest 25(OH)D levels, were the most

likely to die in 1918, as they have been in Mexico to date.

3. In October of 1918, the Spanish flu erupted simultaneously in both Northern

and southern hemispheres.

4. Significant deaths occurred in the Northern hemisphere during the summer of

1918 although the extraordinary killing erupted in October of 1918 in the

Northern Hemisphere.

5. One of the worst affected countries was Western Samoa. A crippling 90% of the

population was infected; 30% of adult men, 22% of adult women and 10% of

children were killed. This devastation occurred during their summer. I doubt

90% of the population of Western Samoa had levels below 50 ng/ml in 1918 but I

have no way of knowing. More likely, the population had little acquired

immunity to any influenza virus.

Jordan EO: Epidemic Influenza, a survey. Chicago: American Medical Association;

1927.

After rereading Jordan, I doubt vitamin D was the controlling factor in the 1918

Pandemic. Furthermore, some of the above data - highest death rates in whites

and young adults suggests having some vitamin D was a risk factor for death.

Thus, take enough Vitamin D.

However, other facts suggest Vitamin D was protective in 1918:

1. The mass of deaths in the Northern hemisphere occurred when Vitamin D levels

were low (fall and winter).

2. While infection rates were similar for sailors and troops on infected troop

transport ships, the sailors had 1/4 the mortality of the troops. One has to

assume the 25(OH)D of sailors aboard 1918 troop transport ships was higher than

the troops inside.

3. Underground coal miners in North America had the highest mortality of any

occupation.

4. The incidence of influenza in the French army was much higher in troops away

from the front (probably in barracks) than in front line troops.

5. Open air hospitals in North America allegedly had lower mortalities than

regular hospitals.

6. Mortality for sailors at sea was markedly lower than sailors ashore, despite

the crowed conditions on board.

7. In the Western Front, the 1918 flu disappeared in August (when 25(OH)D levels

reach their peak) only to return in September, when 25(OH)D levels fall rapidly.

My best guess is that 5,000 IU/day and a 25(OH)D of > 50 ng/ml will be at least

partially protective. Remember, at 50 ng/ml, you are assured that you are not

suffering from substrate starvation, that is, your body has enough Vitamin D for

its needs and some left over to store. At a level of 30 ng/ml, most people are

still suffering from Vitamin D substrate starvation.

Heaney RP, Armas LA, Shary JR, Bell NH, Binkley N, Hollis BW. 25-Hydroxylation

of vitamin D3: relation to circulating vitamin D3 under various input

conditions. Am J Clin Nutr. 2008 Jun;87(6):1738-42.

As I have written before, 25(OH)D levels are like water from a mountain spring.

The topmost pool is the calcium economy. When that pool is full, excess 25(OH)D

flows down to hundreds of pools below, cancer, heart disease, infection, etc.

In a lethal pandemic, you want Vitamin D to do two things, increase production

of natural antibiotics (AMPs) and quell excessive immune responses. Are these

two pools at the same level? Is the AMP pool above the cytokine dampening pool?

If so, people with 25(OH)D levels of 30 ng/ml may have enough D to strengthen

their innate immunity but not enough to prevent the cytokine storm that kills in

a lethal pandemic. Thus, people taking only 1,000 - 2,000 IU/day, with levels

around 30 ng/ml, may risk death from a cytokine storm their body is unable to

prevent. While only a theory, it would explain why the people with the

allegedly highest 25(OH)D levels in both Mexico and 1918 (young adults) were the

most likely to die. That is why I caution people that, if you are going to take

Vitamin D, take enough, take 5,000 IU/day, which is usually enough to get your

25(OH)D levels into the mid range of the reference range (30-100 ng/ml), which

would be 50-70 ng/ml.

Dear Dr. Cannell:

Will this H1N1 flu reappear next fall?

May, Washington DC

Dear May:

Million dollar question! Flu viruses constantly mutate. Right now it lacks an

amino acid sequence that confers lethality. Will it acquire that amino acid by

next fall? I don't know and if anyone one tells you they know then you know a

fool.

Dear Dr. Cannell:

Will you and your family take the flu shot they are developing?

Jerry, North Carolina.

Dear Jerry:

Yes.

However, it will probably not do much as it may be unable to generate an immune

response in those with high 25(OH)D levels. Two Russian studies, the only such

studies in the world, suggest higher vitamin D levels prevent the immune

response flu shots attempt to generate. Dr. Dowell, at the CDC, has known

about these two studies for at least five years.

In 1977, Russian scientists inoculated 834 non-immune males with live attenuated

influenza virus in St sburg (62 N) and Krasnodar (45 N), Russia during

different seasons of the year, comparing them to 414 vehicle placebo controls.

In St sburg, they found that the attenuated virus was about eight times

more likely to cause physical evidence of infection (fever) in the winter than

the summer (6.7% vs. 0.8%). In Krasnodar, 8% of inoculated subjects developed a

fever from the virus in January, but only 0.1% did so in May.

Shadrin AS, Marinich IG, Taros LY. Experimental and epidemiological estimation

of seasonal and climatogeographical features of non-specific resistance of the

organism to influenza. Journal of Hygiene, Epidemiology, Microbiology, and

Immunology 1977; 21: 155161.

Different Russian scientists found that fever after inoculation with attenuated

virus was twice as likely in February (10.7%) as in June (5%), compared to

vehicle placebo controls. They also confirmed that sero-conversion varied by

season, with the lowest rate of antibody formation in summer. When they

attempted to recover the virus 4872 h after inoculation, they found subjects

were more likely to shed the virus in December (40%) than in September (16%),

and the quantity of virus shed was significantly lower in summer than winter.

Zykov MP, Sosunov AV. Vaccination activity of live influenza vaccine in

different seasons of the year. Journal of Hygiene, Epidemiology, Microbiology,

and Immunology 1987; 31: 453459.

These two studies suggest higher Vitamin D levels may prevent a vaccine from

causing an immune response, the whole idea of a vaccine.

Dear Dr. Cannell:

What about Guillain-Barré Syndrome if I take the flu shot?

Jeanne, California

Dear Jeanne:

Influenza or influenza like illness usually precedes the autoimmune process of

Guillain-Barré Syndrome. Thus, a recent study found a seven-fold risk for those

who contracted the flu but a slightly decreased risk for those getting a modern

vaccine.

Stowe J, s N, Wise L, E. Investigation of the temporal association

of Guillain-Barre syndrome with influenza vaccine and influenza-like illness

using the United Kingdom General Practice Research Database. Am J Epidemiol.

2009 Feb 1;169(3):382-8.

This appears to be much different than the 1976-77 swine flu experience, the

last time a swine flu virus caused this type of consternation. Then, the

vaccine was associated with a seven-fold risk of Guillain-Barré Syndrome, but

the feared pandemic never materialized. That is, as Guillain-Barré Syndrome is

a complication of the flu and the flu failed to materialize that year, we will

never know what the risk of Guillain-Barré Syndrome would have been in 1978 in

those who got the flu but no flu shot.

Safranek TJ, Lawrence DN, Kurland LT, Culver DH, Wiederholt WC, Hayner NS,

Osterholm MT, O'Brien P, JM. Reassessment of the association between

Guillain-Barré syndrome and receipt of swine influenza vaccine in 1976-1977:

results of a two-state study. Expert Neurology Group. Am J Epidemiol. 1991 May

1;133(9):940-51.

As Guillain-Barré Syndrome is an autoimmune process, those on 5,000 IU per day

should not have to fear it.

Dear Dr. Cannell:

Why does the CDC and WHO ignore all the work on Vitamin D and flu?

Sally, California

Dear Sally:

I'm not sure. A randomized placebo controlled trial showed vitamin D prevents

colds and flu.

Aloia JF, Li-Ng M. Re: epidemic influenza and vitamin D. Epidemiol Infect. 2007

Oct;135(7):1095-6;

However, when these same authors attempted to reproduce their findings by giving

2,000 IU/day for four months, they found no protective effect of Vitamin D.

Li-Ng M, Aloia JF, Pollack S, Cunha BA, Mikhail M, Yeh J, Berbari N. A

randomized controlled trial of vitamin D3 supplementation for the prevention of

symptomatic upper respiratory tract infections. Epidemiol Infect. 2009 Mar

19:1-9.

However, these same authors have since concluded that 2,000 IU/day for four

months is an inadequate dose and 5,000 IU per day is generally required to

assure 95% of the population has adequate levels.

Aloia JF, Patel M, Dimaano R, Li-Ng M, Talwar SA, Mikhail M, Pollack S, Yeh JK.

Vitamin D intake to attain a desired serum 25-hydroxyvitamin D concentration. Am

J Clin Nutr. 2008 Jun;87(6):1952-8.

At least 5 studies show an inverse association between lower respiratory tract

infections and 25(OH)D levels or sunshine. That is, the higher your 25(OH)D

level, the fewer colds and flu:

Laaksi I, Ruohola JP, Tuohimaa P, Auvinen A, Haataja R, Pihlajamäki H, Ylikomi

T. An association of serum vitamin D concentrations < 40 nmol/L with acute

respiratory tract infection in young Finnish men. Am J Clin Nutr. 2007

Sep;86(3):714-7.

Karatekin G, Kaya A, Salihoðlu O, Balci H, Nuhoðlu A. Association of subclinical

vitamin D deficiency in newborns with acute lower respiratory infection and

their mothers. Eur J Clin Nutr. 2009 Apr;63(4):473-7.

Ginde AA, Mansbach JM, Camargo CA Jr. Association between serum

25-hydroxy-vitamin D level and upper respiratory tract infection in the Third

National Health and Nutrition Examination Survey. Arch Intern Med. 2009 Feb

23;169(4):384-90.

Wayse V, Yousafzai A, Mogale K, Filteau S. Association of subclinical vitamin D

deficiency with severe acute lower respiratory infection in Indian children

under 5 y. Eur J Clin Nutr. 2004 Apr;58(4):563-7.

Termorshuizen F, Wijga A, Gerritsen J, Neijens HJ, van Loveren H. Exposure to

solar ultraviolet radiation and respiratory tract symptoms in 1-year-old

children. Photodermatol Photoimmunol Photomed. 2004 Oct;20(5):270-1.

Despite these studies, the scientists at CDC and WHO are thinking only in terms

of a vaccine or TamiFlu. The idea of strengthening the innate immune system

with Vitamin D is simply not on their radar. Many of these scientists have

financial connections to the influenza industry. However, It is not a

conspiracy. When I was young, I thought most things were conspiracies. Now

that I am older, I know it is not a conspiracy, only incompetence.

If this virus mutates this summer and acquires more lethality and maintains its

transmissibility, we may experience another 1918 pandemic. If so, I plan to be

fully armed, with both Vitamin D and the best modern conventional medicine has

to offer.

Cannell, MD

President

Vitamin D Council

This is a periodic newsletter from the Vitamin D Council, a non-profit trying to

end the epidemic of vitamin D deficiency. Please reproduce it and post it on

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