Do You Know How Much Vitamin D Your Body Needs?
Two thirds of the world’s population, including about half the people in North America and Western Europe, get an insufficient supply of vitamin D, according to vitamin D expert Anthony Norman, PhD.
His article appeared in the July, 2010 issue of Endocrine Today, a monthly newspaper about diabetes and endocrine disorders. Several studies have reported reduced risks of breast cancer, colon cancer and type 1 diabetes with adequate levels of vitamin D, the positive effect generally occurring within five years of beginning to get an adequate vitamin D intake, writes Norman.
It was Norman’s lab that discovered, in 1967, that vitamin D is converted by the body into a steroid hormone; and later discovered that 37 body organs respond to it biologically.
Vitamin D is found in very few foods naturally – fish, eggs and cod liver oil – which is why some other foods such as milk, orange juice, some yogurts and some breakfast foods are fortified with it.
Currently, the recommended daily intake of vitamin D is:
- 200 international units (IU) for people up to 50 years old;
- 400 IU for people 51 to 70 years old; and
- 600 IU for people over 70 years old.
But many scientists suggest that amounts as high as 2,000 to 4,000 IU are required for optimal health, levels which cannot be achieved through food alone; a combination of food, sunshine and supplements may be needed to achieve these levels.
Risk of Parkinson’s with Low Vitamin D
A study of 3,000 people found that those with the lowest blood levels of vitamin D appeared to be three times as likely to develop Parkinson’s disease later in life – up to 30 years later – compared to those with highest levels.
Parkinson’s affects several brain areas and causes tremors and slow movements. Vitamin D is called the sunshine vitamin because the skin can produce substantial amounts when in the presence of sunlight. It is also found in oily fish, milk, cereals and supplement pills.
For years, scientists have known that vitamin D assists calcium uptake and bone formation but recent evidence suggests it plays a role in regulating the immune system and developing the nervous system.
A level of 30 nanograms per milliliter of blood appears optimal for bone health. But the researchers suggested further research to determine the optimal blood level of vitamin D for brain and nerve health, as well as to determine the level of toxicity, neither of which is known. This study, which has been published in the July 2010 issue of the journal, Archives of Neurology, can be read online with journal subscription: http://bit.ly/bqfjsl
Vitamin D & Mental Agility
Cognitive performance is much improved among the elderly who are not deficient in vitamin D, and vitamin D deficiency may be common among shut-in seniors due to limited access to sunshine and other factors, according to a new study.
More than 1,000 study participants who were receiving home care were assessed for vitamin D status. Only 35 percent of participants had sufficient vitamin D levels and this group scored higher on cognitive performance tests than those who were deficient or insufficient in vitamin D. Pathways for vitamin D have been identified in the hippocampus and cerebellum areas of the brain; these are regions associated with planning, processing new information and forming new memories, suggesting vitamin D is important to the cognitive process and for independent senior living.
The study was released by the journal titled, Journals of Gerontology, Series A, Biological Sciences and Medical Sciences, in a summary format. But it is available in full-text format at: http://bit.ly/d2FtYY.
Vitamin D Levels Low In Rheumatic Patients
Three separate studies paint a worrisome picture of vitamin D deficiencies among patients of rheumatic diseases. Rheumatic disorders are those of the joints and connective tissue and include rheumatoid arthritis, osteoarthritis and lupus, among others.
Two new studies found deficient vitamin D levels in these patients. But a third new study found deficiencies of vitamin D still remained in most patients even after supplementation for six months, with 800-1000 IU. This suggests that vitamin D is a common finding in rheumatic patients and that supplementation with 800-1000 IU is insufficient to normalize levels.
Would higher levels of supplementation work? The researchers report that the answer is not yet clear. All three studies were separately presented June 18 at EULAR 2010, the Annual Congress of the European League Against Rheumatism, in Rome. They have not been published yet.
Vitamin D Protects Against Viruses
A new study has found that vitamin D – long associated with good bone health – provides protection against viral respiratory tract infections, reducing their incidence and severity. One example of this type of infection would be influenza.
Researchers followed 198 healthy adults during the fall and winter of 2009 – 2010 and measured each individual’s ongoing blood levels of vitamin D in a seasonal period when these levels tend to fall due to the lack of sunlight. Levels were weighed against the incidence and symptoms of respiratory infections; those with the highest vitamin D levels experienced less illness and significantly reduced days of symptoms. Vitamin D is also known to support the body’s absorption of calcium to prevent osteoporosis, and has been linked to cardiovascular health.
This study was published June 15, 2010 by the open-access journal PLoS ONE and the full-text version is now available at: http://bit.ly/aXsUmY.
How to Choose Bottled Water
With all the bottled waters on the market today, it’s difficult to tell one type from another. Here are a few important definitions to help you make your choice:
- Usually, mineral water contains at least 500 parts per million dissolved mineral solids such as sodium, magnesium or calcium.
- Sparkling water is carbonated water in which the gases dissolved are “captured” in the water by capping the bottle before they can escape.
- Club soda is artificially carbonated tap water to which minerals have been added.
- Seltzer is artificially carbonated tap water that frequently is flavored or sweetened, making it high in calories.
Learn more about NutraMin Pure here: http://www.advantig.net/products/nutramin
How to Get the Most From Vitamin D
Your body may make better use of supplemental Vitamin D if you take it with your largest meal of the day, boosting its uptake over a 2-3 month period by as much as 56 percent, according to a study at the Cleveland Clinic, detailed in the April 2010 issue of the Journal of Bone and Mineral Research.
TIP TO REMEMBER – Vitamin D is a fat soluble vitamin. Fat soluble vitamins should always be taken with the highest fat meal of the day.
Vitamin D is loosely linked with a decreased risk of autoimmune disorders.
Bone Health: Are Calcium & Vitamin D Enough?
“The WHI CaD” study is the largest randomized clinical trial conducted on calcium supplementation in post-menopausal women. It followed over 36,000 women for ~7 years. Half of the women took 1,000 mg of Calcium and 400 IU of Vitamin D; the other half took a placebo.
RESULTS: Women taking placebos had a hip fracture rate of 14/10,000. Women taking calcium and vitamin D had a hip fracture rate of 10/10,000. While the trend is favorable, the message of the study is that calcium and vitamin D are not enough, according to Dr. Joel Finkelstein, an osteoporosis researcher at the Massachusetts General Hospital in Boston. “It is a good start, but women at higher risk need to know it is not enough.”
Dr. Joel Finkelstein:
“With widespread marketing calcium & vitamin D, many women believe that they are completely protected against the development of osteoporosis if they are taking these supplements. This study should help correct this important misconception and allow more women to receive optimal therapy for bone health.”
Finkelstein, JS. Calcium plus Vitamin D for post menopausal women – Bone Appetit? N Engl J Med 2006: 354; 750-752.
Suggestions for Optimal Bone Health
The Importance of Natural Vitamin K2 (MK-7)
Researchers investigated why women in the Eastern part of Japan had much lower incidence of hip fracture vs. women who lived in other parts of Japan. It came down to a Japanese traditional food consumed only in the region where women had very low incidence of hip fracture – a marker in medicine for bone density.
Natto.
Natto is a traditional Japanese fermented soybean dish commonly consumed in Eastern Japan. Natto is a fermented, soybean cheese-like dish that has a very strong amoniacal smell with a gluey texture and spiderweb-like strings when you stir it. So what does Natto have to do with bone density?
Vitamin K2, specifically, Menaquinone 7 (MK-7)
Researchers report Natto contains natural Vitamin K2, specifically Menaquinone 7 (MK-7) that is linked to stabilization of bone proteins, positively impacting bone density. Not only is Natural Vitamin K2 (specifically MK-7) important for healthy bones, scientists discovered that MK-7 supports cardiovascular health as well. The growing body of Vitamin K2 research indicates that it is a very promising nutrient for supporting healthy bone density.
For more information on nutrients that support bone density, click here to read about Osteo K-2.