Not having enough natural vitamin E and naturally-produced vitamin D in the body can predispose a person to dementia and cognitive decline.

In a recent Dutch study published in the Journal of Alzheimer’s Disease, it was found that not having enough vitamin E and vitamin D over the long term predisposed a person to cognitive decline and even the psychiatric disorder dementia.

Vitamin E and dementia

The study, which was undertaken by researchers from the Erasmus Medical Center, used questionnaires to track the diet of more than five thousand individual respondents.  The respondents were further tracked for an additional ten years.  Within this period of time, more than four hundred respondents were diagnosed with dementia while more than three hundred respondents developed Alzheimer’s disease.

After analyzing the combined data produced by the five thousand plus test subjects, it was found that an average intake of 18.5 mg of vitamin E reduced the chances of developing the psychiatric disease dementia than those who did not.  Individuals who had developed dementia had an average intake of only 9 mg of vitamin E per day.

According to the researchers, the connection between vitamin E intake and brain health is quite straightforward: the brain is an organ that is in constant metabolic activity.  Organic metabolism produces waste products, including free radicals.  If there are too many free radicals in the brain and too little anti-oxidants in the body, the brain tissue suffers directly from oxidative stress.  Vitamin E and other anti-oxidants can help reduce oxidative stress, which in turn promotes overall wellness and not just brain health.

Vitamin D and cognitive decline

In an unrelated study, researchers from UK’s University of Exeter discovered that individuals who had too little vitamin D were at risk for cognitive decline over the long term.  The study made use of data collected from more than 800 adults in the UK, who were above 50 in age.  Instead of questionnaires, the UK study used actual cognitive tests to measure cognitive stability and decline over a six year period.  They also tested the level of vitamin D present in the blood of the test subjects.

It was found that test subjects who had less than twenty-five nanomoles for every liter of blood had a 60% higher chance of cognitive decline.  According to David Llewellyn, lead researcher, a causal pathway between vitamin D deficiency and cognitive decline has finally been established with the help of their study, which means that cognitive decline can indeed be prevented by increasing the amount of vitamin D in the body.  And the easiest and most natural way to do this is to get direct sun exposure for at least ten minutes everyday.

In a  commentary produced by academics from the University of Auckland, it was said that it was high time that further examinations be performed to find out whether or not the public should be formally made aware of the benefits of vitamin D.

Natural or synthetic vitamin E

There are two main forms of vitamin E available in the market – synthetic vitamin E and natural vitamin E.  While some experts say that it’s basically the same, a study that had been published in the American Journal of Clinical Nutrition begs to differ.

According to the study, natural vitamin E was more bio-available than synthetic vitamin E.  Bio-availability is an important issue when it comes to supplements because it is the direct measurement of how much of a supplement is actually absorbed and used by the body. When there is low bio-availability, the benefits of a supplement are not maximized because only part of the dose is actually absorbed.

Other benefits of vitamin D and vitamin E

Vitamin D

1. Getting enough vitamin D can prevent advanced arthritic conditions from manifesting – you just have to be outdoors a few minutes everyday to keep your vitamin D levels up.  As one ages, the natural vitamin D production decreases, so you have to adjust your lifestyle to increase production during the golden years.

2. Healthy levels of vitamin D can help benefit the cardiac function by regulating blood pressure levels.

3. A link between vitamin D intake and reduction of the risk for multiple sclerosis has been established by numerous independent studies.

4. Vitamin D can help people with chronic pain.  People with fibromyalgia, arthritis and joint pain can also benefit from vitamin D intake.

Vitamin E

1. Vitamin E can keep older women healthy and free from common chronic, degenerative disease, says a study that has been published in the Journal of the AMA.

2. Vitamin E has been shown to slow down the growth of prostate cancer, according to a US study called the SELECT trial.

3. Vitamin E has natural anti-oxidant properties, which reduces oxidative stress and may also help reduce the occurrence of many types of cancer, including breast cancer and prostate cancer.

4. Vitamin E when applied topically can help lighten scars by improving the production of new skin and the formation of collagen, an important component in the skin that makes it resistant to physical stresses and also makes it supple.

400 IU of natural vitamin E per day is recommended for women over the age forty for general wellness and possible cancer prevention.

Sources:
nutraingredients.com
vitamins-nutrition.org
longevity.about.com
heartdisease.about.com
ms.about.com
arthritis.about.com
nutrition.about.com
prostatecancer.about.com
breastcancer.about.com
adam.about.com
altmedicine.about.com
longevity.about.com

]]> http://naturalhealthontheweb.com/mangano-minute/blogs/?feed=rss2&p=1495 0 http://naturalhealthontheweb.com/mangano-minute/blogs/?p=1490 http://naturalhealthontheweb.com/mangano-minute/blogs/?p=1490#comments Tue, 13 Jul 2010 05:00:08 +0000 admin http://naturalhealthontheweb.com/mangano-minute/blogs/?p=1490

Senior individuals with low levels of vitamin D are more likely to develop metabolic syndrome, which increases the risk for diabetes and heart diseases.

Researchers from the VU University Medical Center in Amsterdam state that insufficient amounts of vitamin D in seniors may be one of leading causes of metabolic syndrome.

The study involved 1,300 respondents (men and women) over the age of 65. A staggering 50% of all the respondents had vitamin D deficiency. Thirty-five percent of this segment of the respondents of the study had metabolic syndrome.

According to Dr. Marelise Eekhoff, co-author of the metabolic syndrome study, the findings of the study is significant because metabolic syndrome actually predisposes a person to other degenerative conditions like adult-onset/type-2 diabetes and heart problems.

Universal medical problem

In another study published in the medical journal Diabetes in the United States, it was found that 40% of elderly Chinese persons had metabolic syndrome because of the same vitamin deficiency.

In earlier animal studies, it was observed that test animals that had vitamin D deficiency had difficulty in producing and secreting insulin, which is necessary for the breakdown and utilization of blood glucose.

Dr. Eekhoff states that logically, increasing vitamin D in the body through supplementation and proper exposure to natural sunlight can help prevent metabolic syndrome and all of the medical maladies associated with the condition.

Getting enough of the vitamin

The National Academy of Sciences recommends that every person have at least 200 IU of vitamin D everyday to reduce risk of disease and to promote general wellness. For maximum benefits, 800 IU to 1000 IU can be used safely; the upper limit for vitamin D supplementation is 2000 IU everyday.

The following may cause vitamin D deficiency:

1. You don’t get enough vitamin D over a very long period of time (e.g. for years).

2. You don’t go outside to expose yourself to natural sunlight regularly.

3. Darker skins have reduced capacities to produce vitamin D.

4. Your kidneys are unable to help manufacture the vitamin naturally. This problem is more common in seniors than in younger individuals.

5. The digestive tract is unable to absorb available vitamin D in the body.

6. Obesity can also reduce the body’s capacity to use vitamin D, since fat cells leech the available vitamin D. People with a BMI of thirty or higher often have vitamin D deficiency.

Dire consequence of vitamin deficiency

What happens when you don’t have vitamin D? Here are just some of the problems associated with vitamin D deficiency:

1. Vitamin D deficiency, according to recent research, has been linked to higher risk of high blood pressure and other heart-related problems.

2. Vegetarians who shun dairy products and eggs may be at risk for vitamin D deficiency. If you are a vegan, you can easily supplement your diet with vitamin D by taking small amounts of fish liver oils.

3. The most common problem associated with not getting enough vitamin D is rickets, which cause soft bone formation and a deformed skeletal system.

4. Older adults may suffer from cognitive impairment if they lack sufficient vitamin D.

5. Children with low levels of vitamin D are predisposed to severe forms of asthma.

6. The risk for nearly all types of cancer increases with vitamin D deficiency, including breast cancer (according to one US study) and colorectal cancer.

7. Children vitamin D deficiency may suffer from slow growth.

8. According to Michael Holick MD from the Boston Medical Center, extreme vitamin D deficiency predisposes a pregnant woman to deliver via caesarean section (C-section).

9. In a study headed by researchers from the SUNY Upstate Medical University in New York, insufficient amounts of vitamin D in women can cause pelvic floor disorders and urinary incontinence.

10. Persons recovering from post-traumatic brain injury with vitamin D deficiencies are more at risk for chronic fatigue, says a study from Rijnstate Hospital in The Netherlands.

11. According to researchers from the Heart Institute of the Intermountain Medical Center, people with low levels of the vitamin are 77% likelier to die from a stroke.

12. Type 2 diabetics suffering from poor blood glucose control may be suffering from vitamin D deficiency, as well.

Sources:
nutraingredients.com
mayoclinic.com
webmd.com
webmd.com
webmd.com
webmd.com
webmd.com
sciencedaily.com
sciencedaily.com
sciencedaily.com

A chemical compound called epigallocatechin gallate showed much promise by killing cancerous cells during a phase 2 clinical study.

According to a study performed by researchers from the Mayo Clinic, the extract of the world-popular green tea has been effective in regulating the growth and proliferation of cancer cells in patients with chronic lymphocytic leukemia (CLL).  The study was classified as a phase two human clinical trial, and the results were very promising indeed.

Epigallocatechin gallate vs. cancer cells

The compound epigallocatechin gallate was shown to have the ability to kill cancer cells in patients with CLL.  The compound prevented the cancer cells from surviving, thereby effectively reducing the total cancer cell count. The first phase of the human clinical trial of epigallocatechin gallate also showed similar, positive results.

What does this all mean?  According to one of the Mayo researchers, Dr. Tait Shanafelt, the two clinical trials show that epigallocatechin gallate showed some promise in stabilizing or normalizing the condition of patients with CLL.  While the compound is not classified as a definitive cure for the condition, it shows promise in slowing down the progress of the medical condition.

Instead of a cure, Mayo clinic researchers state that the compound should be viewed as a cancer preventive rather than cancer cure. And there was a catch: the patients that were subjected to the nutraceutical treatment were patients who had early signs of CLL (not advanced stage CLL).

The study involved thirty-six respondents and resulted in a fifty percent reduction of leukemia cell count at the end of the human clinical trial.  Including the patients from the first clinical trial, the total number of CLL patients involved in the study is forty-two.  A third clinical trial is needed before the Mayo Clinic researchers can make a definitive recommendation regarding the use of epigallocatechin gallate for CLL sufferers.

Other benefits of green tea

Tea is the second most drunk beverage in the world (right next to water). It contains natural antioxidants and caffeine (50% less than regular coffee).  And did I mention that it’s good for you for a lot of reasons?  It’s more than just a cancer preventive.  Here are some more health benefits of drinking green tea:

1. According to a study published by the American Medical Association, 40,000 respondents (from Japan; all of them drank up three cups of green tea per day) showed no evidence of cardiovascular anomalies and coronary heart problems since the study started back in the year 1994.  Not one individual from the 40,000 strong group developed any cancer, too!

2. Drinking green tea reduces the risk of dying from heart disease by twenty six percent (for males).  For women, drinking three to five cups of the precious elixir reduced the risk of dying from heart attacks and other cardiac problems by a staggering thirty-one percent.

3. Having chronic problems with sleep apnea (disturbances during sleep) and poor sleep quality, generally?   Reach for green tea.  US studies found out that chemical compounds in green tea can help prevent cognitive troubles resulting from poor sleep.

4. If you have trouble memorizing for school, don’t drink soda.  Instead, make yourself a nice, warm green tea brew.  There is no reason not to enjoy this beverage as it now comes in many natural flavors, like blueberry, cinnamon, etc.

All you have to do is choose your favorite flavor and use a French press to make an instant cup of tea.  Or you can just buy tea bags and allow the tea to infuse itself into the water for a few minutes.  I recommend this and that’s how I make my green tea.  The longer you keep the teabag in the hot water, the stronger the tea.

You can also add a bit of cinnamon to make the tea more interesting.  Since tea has caffeine, it can also help keep you more alert and awake when working or studying.   Green tea also has theanine, which has been shown to have beneficial effects in that region of the human brain that is responsible for alertness.

5. Suffering from poor immunity against common illnesses like the flu and the common cold?  Green tea is rich in chemical compounds called polyphenols, which can help boost your immune system.  Polyphenols can also help slow down aging by reducing the oxidative stress that the body experiences from free radicals.  Polyphenols are capable of disabling free radicals in the body.

6. Substituting polyphenol-rich beverages like green tea for soda and the like can also reverse the spike in body weight.  Because green tea doesn’t have much sugar, it does not contribute much to your weight (apart from its water content).  If you are having trouble with ‘water weight’, then all you have to do is to sip on the green tea during the day instead of downing a whole cup in one go.  But don’t forget: being well-hydrated is more important.  Also, water helps the body lose weight by helping in better digestion and also by helping the body burn calories more efficiently.

7. According to researchers from the Chinese University of Hong Kong, the antioxidants present in green tea can also penetrate the tissues in the eyes and do a world of good there.  Increased antioxidant activity in any body tissue has always been linked to decreased inflammation and healthier tissues and cells.

8. All kinds of tea come from the same camella plant – and tea always has more than ten times the amount of antioxidant chemicals than regular vegetables and fruits.  So drink up!  Green tea can also help prevent dangerous blood clots from forming in veins and arteries (which can lead to heart attack and stroke).  You also reduce the risk for atherosclerosis when you drink plenty of tea, say Dr. John Weisburger, the US’s pro-tea champion and veteran researcher (who is also, incidentally, already eighty two years old!)

Cancer prevention

In the spirit of global cancer prevention, here are some easy steps that you can prevent different types of cancer.

Prostate Cancer

• In a European study, it was discovered that regular intake of legumes and other vegetables lowered the risk of prostate cancer over the long term.
• Nutrients like vitamin D, isoflavanoids and selenium can help reduce prostate cancer by stopping the chemical processes that can lead to the formation of cancer cells.

Skin Cancer

• Increase your intake of antioxidants prior to sun exposure or take an umbrella with you when going out into the direct heat of the sun for a long period of time!
• Beta-carotene has been linked to reduced risk of developing cancerous skin cells.

Lung Cancer

• Long term tobacco smoke has been linked to lung cancer – so stop the habit before it leads to something much, much worse than just stained teeth.
• Regular exercise produces a protective effect on the body – including the respiratory system. Get enough exercise to strengthen your breathing apparatus.

Sources:
sciencedaily.com
blogs.webmd.com
blogs.webmd.com
webmd.com
webmd.com
webmd.com
webmd.com
webmd.com

Vitamin D has been linked to many health conditions before. A recent study links insufficient levels of the vitamin with the disabling condition depression

In a recent study performed by researchers from the National Institute of Aging in the United States, insufficient levels of vitamin D may be the reason why many individuals over the age of 65 are experiencing symptoms of depression.

Senior individuals often have low levels of the important vitamin because they tend to stay indoors more often, as opposed to younger, more sprightly individuals with more active lifestyles. The study was published in a medical journal on endocrinology this year.

According to Luigi Ferrucci, the lead researcher, the emerging link between vitamin D deficiency and the occurrence of depression must be further investigated.  The study involved a follow-up testing of nearly one thousand male and female respondents within a six-year period.

The researchers used a specialized scale that measured the symptoms of depression called CES-D.  The researchers discovered that those with lower levels of vitamin D in their blood tended to have poorer score in the CES-D test.  Those with higher vitamin D percentages in their blood scored better in the same test.

Alarming, global trend

Depression is fast becoming one of the leading causes of disability around the world, not just in the United States.  It is estimated that today, there are 120 million people afflicted with the condition.  Ferrucci’s study is not the first to point at the possible link between the vitamin and depression.

In an earlier study carried out two years ago, Dutch researchers reported that insufficient levels of the vitamin in the body resulted in a higher percentage of the parathyroid hormone.

This hormone, which is used by the body to regulate calcium loss, has been directly linked to a higher incidence of depression in some one thousand two hundred respondents in yet another independent study.  This is the reason why a causal pathway must be mapped out to determine just how this vitamin affects the human brain.

In a fourth related study, researchers McCann and Arnes noted that vitamin D is important for the proper functioning and health of the human brain.  The widespread presence of vitamin D receptors throughout the human brain is evidence of the vital role of the nutrient in brain health.

According to yet another scientific review, vitamin D has been associated with affecting proteins in the human brain that are responsible for governing the learning process and remembering.  If an imbalance occurs in these areas, you can just imagine a chain reaction occurring throughout the brain.

Benefits of vitamin D

There are several ways that you can get vitamin D: natural exposure to sunlight, food (like dairy products, e.g. yogurt, milk, etc.) and through vitamin supplementation.  The body only needs about 10 – 15 minutes of exposure to natural sunlight to produce vitamin D on its own.

If this is not possible, people with low levels of vitamin D should explore vitamin supplementation; this applies most especially to senior individuals who may not be eating well or are unable to engage in a more active lifestyle.  Instead of using sunscreen when going out to get your healthy dose of sunshine, you can protect your skin naturally by taking natural antioxidants like fresh wheatgrass juice and citrus fruits.

The usual recommended dose for adults is between 400 to 800 IU (international units) of vitamin D everyday. Pregnant women should be given a higher dose (800 IU) to ensure optimum bone health and proper development of the fetus.

And there are more reasons to love vitamin D! Here are some of the most important benefits:

1. It is needed for proper absorption and utilization of calcium and phosphorous.  It is needed for the proper maintenance and repair of the bones and skin.

2. It strengthens and helps maintain the immune function of the body. Conditions like flu and the common cold can be warded off more efficiently if the immune system is strengthened by vitamin D.

3. It is an important nutrient that prevents the occurrence of MS (multiple sclerosis).  According to researchers from the Oregon Health & Science University, MS is less frequent in tropical countries because there is more available sunshine in these places than in temperate regions.

4. Vitamin D has also been linked to the maintenance of normal body weight (according to research from the Medical College of Georgia).

5. Vitamin D is important for brain health in the later years (60 – 79 years of age).

6. In a recent study from the Harvard Medical School, vitamin D can also reduce asthma attacks in asthmatic individuals.

7. We are exposed continually to low levels of radiation.  The good news is vitamin D can also help protect us from such exposures.

According to US cancer researchers, people with adequate levels of vitamin D have a lower risk for many types of cancer than people with low or inadequate levels of the vitamin.

Sources:
nutraingredients.com
healthvitaminsguide.com
medicalnewstoday.com

Denmark researchers have found that if we aren’t getting enough Vitamin D our bodies are less able to fight infection.

If you want to keep your immune system strong and healthy, it is key to make sure you are getting enough Vitamin D.  For quite some time health news has been circulating that lack of Vitamin D is linked to a variety of diseases and ailments including depression, breast cancer, osteoporosis, chronic pain, and heart disease.

A new research study out of Copenhagen, Denmark has presented yet another reason why you should get as much Vitamin D as possible.  Scientists have found that this vitamin is necessary to activate the T cells (often also called “killer cells”) in our immune system. Although their name may cause you to think that killer cells are to be avoided, they actually are important to have in your system as they seek out and destroy diseased cells.  When your body has ample levels of Vitamin D, these killer cells can work in your benefit to fight elements that could potentially do you harm.

In the research study, Professor Carsten Geisler and his team traced PLC-gamma1, a molecule that allows the cell to fight disease. They found that when cells are not activated by Vitamin D, they barely express PLC-gamma1. However, when Vitamin D is received, the PLC-gamma1 increases by over 75%.

According to the scientists, “Scientists have known for a long time that vitamin D is important for calcium absorption and the vitamin has also been implicated in diseases such as cancer and multiple sclerosis, but what we didn’t realize is how crucial vitamin D is for actually activating the immune system – which we know now.”

As my readers know, I have been consistently advising people to consume Vitamin D for years.  So how do you get more Vitamin D into your system? The best way to get Vitamin D is to increase your exposure to sunlight.  Just 5-30 minutes of sun exposure can greatly increase the amount of D in your system.  This means that you don’t even necessarily have to go sunbathing, just a short walk on your lunch break will do the trick.  Now remember not to use sunscreen, as it typically contains cancer-causing agents.

Unless you are living in an area that is sunny year-round like Florida or San Diego, the best way to get Vitamin D in the winter months is through your diet and supplements.  There aren’t a ton of foods that contain Vitamin D, so choose carefully. Some healthy choices that I like to recommend include dandelion greens, oatmeal, low mercury tuna and sweet potatoes.

While the recommended dose of Vitamin D is 200 IU for people up to age 50 and 400 IU for people between 51-70, a general rule of thumb is to get as much Vitamin D as you can.  Make sure you get enough exposure to sunlight and be sure to include healthy foods containing Vitamin D in your diet.

Source:
nutraingredients.com
Web MD

Consider using light therapy to combat the winter blues.

Has the winter season got you down?  If so, you’re not alone.  Because today, the third Monday in January, is Blue Monday—the most depressing day of the year.

I’m not sure how Blue Monday came to be, but apparently a lot of research has been done on this day, and work absenteeism has historically been high.

When you stop and think about it, I suppose it makes sense that this day is so depressing:  Spring seems like it’s light years away, the Christmas season seems like it was months ago, it’s dark outside when you leave for work and it’s dark outside when you come home from work, and there’s just a general sense of blah about life in general.

Of course this kind of thinking gets us nowhere, and as difficult as it may be, you have to actively seek out the positives in every situation life throws at you.  As the song says, you have to “always look at the lighter side of your life.”

And speaking of light, one way to make this a reality is through light therapy.

Our underexposure to light in the winter months has a serious impact on our overall health, our mental health included.  The sun simply doesn’t appear as often in the winter months as it does the summer months (damn that daylight saving time!), and this lack of light has a serious impact on our moods, our behaviors, our thinking processes and our immunity from diseases (studies show that vitamin D deficiency increases the incidence and severity of osteoporosis, fractures, osteopenia, infectious diseases, and autoimmune diseases).

In light of this (pardon the pun), a new study from the University of California says that the recommended intake for people in the winter months ought to be increased from 200 IUs per day to 2,100 IUs for people with dark complexion and 3,100 IUs for people with light complexions.  The study says that the only way for people to achieve a vitamin D sufficiency is through high doses such as these.

To combat the winter blues and future Blue Mondays, I highly recommend getting at least 20 to 30 minutes of direct sunlight.  This is difficult to do on overcast days, but when the sun does shine, make good use of it.  Spend at least 30 minutes outdoors, preferably between 10 a.m. and 2 p.m.  That’s when the sun’s rays are most direct.

Now, obviously, we all have personal and professional lives, and life’s daily tasks don’t always permit our basking in the sun.  If you find that this is the case for you, I highly recommend purchasing a light therapy box.  The light that these boxes emit is obviously not natural sunlight, but it’s as close to the real thing as it gets by mimicking the effects sunlight has on our psyche.

(Note:  Light therapy boxes produce a special kind of light, so don’t think that turning on more lamps and wall switches in your home will solve the problem).

Blue Mondays have to be fought and you can win that battle through the beneficial effects of light therapy.

Sources:
mayoclinic.com
nutraingredients.com
cbc.ca
dailymail.co.uk

Vitamin D: It's a matter of life and death--literally.

Ever wonder what the ‘D’ in vitamin D stands for?  I think I know—death.

A ton of studies have come out lately regarding vitamin D’s importance to our healthy lives, but there’s been a particular emphasis on how a deficiency in it can increase our risk for death.

I’ve written about many of these, like this one, where Utah researchers found that people “very low” in vitamin D were 45 percent more likely to die from coronary heart disease.  Or this one, where vitamin D-deficient elderly were three times more likely to die prematurely.

And who can forget this one, where researchers from the American Heart Institute found a linkage between people with low levels of vitamin D and the world’s leading killer—heart disease.

Well the most recent news on vitamin D is every bit as macabre as the aforementioned studies.  Because according to a study that’s set to be published in the online edition of the journal Annals of Family Medicine, black Americans are at the most risk for stroke-related deaths if their deficient in vitamin D.  More at risk than any other race.

Hearkening on the prevalence of studies linking vitamin D deficiency to death, researchers from the University of Rochester wanted to see if this rule applied to all cardiac-related deaths.  So with the help of the National heart Lung and Blood Institute, not to mention the 15,000 men and women they had health information on, they found that, indeed, vitamin D deficiency increased the risk of heart and stroke-related deaths by as much as 40 percent (for those who had the rock-bottom lowest vitamin D levels).

But the risk was even greater for African Americans.  When researchers honed their statistics to how race influenced risk, they found that the largest risk was among blacks (38 percent more).

The researchers assessed “risk” by taking into account various symptoms that are symptomatic of cardiac-related deaths, like body mass index, smoking and levels of C-reactive protein.  Of course they also factored into the equation those that had already died of heart-related deaths and what their vitamin D levels were prior to their dying.

Again, the study’s full details will appear on the journal’s web site, January the 11th.

If you haven’t realized how important vitamin D is to your life by now, then you never will.  Vitamin D is absolutely crucial to bone and cell growth, not to mention the body’s ability to absorb and put calcium to use.

If you’re worried about your vitamin D levels—or simply curious about how high or low they may be—a simple blood test will take care of that.  A vitamin D measurement of less than 20 nanograms per millimeter of blood is considered deficient.

Surprisingly, there are very few food sources that contain vitamin D naturally.  It’s frequently added to foods (i.e. fortified).  They are out there, though, and they include salmon, mackerel, tuna, and liver.

You can also get it through vitamin D supplements and cod liver oil.

Or you could go to the most natural of sources there is for vitamin D—the sun.  Ten to 20 minutes of sun exposure will give you your daily D fill.

Sources:
sciencedaily.com
dietary-supplements.info.nih.gov