VITAMIN D DEFICIENCY:
The New Epidemic & Link To Cancer
New research shows that many people in northern latitudes are deficient in Vitamin D. These deficiencies have been linked to higher rates of certain cancers (colon, prostate, and breast), osteoporosis, high blood pressure, diabetes, autoimmune conditions, and SAD. In 2004 the National Institutes of Health held a conference on vitamin D, and this is what they found.
Researchers have discovered that tropical diets have 10 times as much vitamin A and D as northern diets, and that many tropical people do not suffer from “northern diseases”. This has inspired them to gather more data and do research.
WHAT VITAMIN “D” DOES: We get our vitamin D from both sun exposure and certain foods. Vitamin D in its metabolized form is actually a hormone with many functions. It helps us absorb, transport and metabolize essential minerals, particularly: calcium, magnesium, phosphorus, and zinc, which perform vital functions for bones and enzymes. Vitamin D works in the skin, kidneys, muscles, heart, and in 30 different cell types. Vitamin D promotes proper cell development and helps in immune regulation (thus preventing cancers).
AMERICANS AT RISK: Vitamin D levels have fallen in many populations around the world, particularly northern climates. “In northern California 80% of clients tested during winter months demonstrate vitamin D deficiency or insufficiency.” (1) Vitamin D levels are worsened by avoidance of dairy products (allergies and lactose intolerance), low fat intake, excessive breast feeding, use of sun-block, and a “couch-potato” lifestyle. In addition, those with black skin are at greater risk, because their skin blocks much absorption of vitamin D and they are often lactose intolerant. As a result vitamin D deficiency diseases are on the rise again.
BONE DISEASES: "There has been a reemergence of vitamin-D deficient rickets [bowed legs] and alarming rates of low circulating concentrations of vitamin D in the US population.” [Executive Summary, NIH Conference] Low levels of D have also been associated with increased osteoporosis and fractures in the elderly.
CANCERS: Vitamin D modulates the immune system. It reduces cell proliferation, induces cancer cell death, and inhibits metastasis. Several double-blind controlled studies sponsored by the National Cancer Institute have shown remarkable results with vitamin D therapy. By increasing the intake of vitamin D from the old 400 i.u. per day to 2000 i.u. per day, they were able to reduce the rates of colon cancer, prostate cancer and breast cancer by 50%! Higher doses were used with black male patients (3000 – 4000 i.u. / day), which reduced the rate of prostate cancer by 90%! What a bargain for $10 - $15 / month!
HIGH BLOOD PRESSURE: Vitamin D has been shown to lower blood pressure by two mechanisms. Vitamin D inhibits rennin synthesis in the kidneys; this is a substance that increases blood pressure. Vitamin D also helps absorb magnesium; magnesium deficiency is a leading cause of high blood pressure and heart disease.
AUTOIMMUNE DISEASES: Vitamin D deficiencies have been associated with inflammatory and autoimmune diseases. These are diseases where the immune system overreacts and attacks our own cells. Because vitamin D therapy regulates the immune system, it has been shown to improve many of these diseases. These include: Diabetes 1, Multiple Sclerosis, Fibromyalgia, Allergies, Rheumatoid Arthritis, and Inflammatory Bowel Disease.
OTHER DISEASES: Other diseases or conditions have also been associated with vitamin D deficiency. These include: Diabetes 2, Psoriasis, Burns and Healing, SAD (seasonal affective disorder / depression), PMS, Mood Swings, Alcoholism, and Drug Addiction. Several of these diseases are related to zinc deficiency, which is dependent on vitamin D. For example: the hormone insulin contains zinc.
TESTING:
Any major laboratory can do a blood test for 25-hydroxy-vitamin D3. Deficient = <
20. Optimal = 40 – 100. Toxic > 150 ng/ml.
THERAPIES: Lack of Vitamin D can be dealt with several ways using sunlight, foods and supplements.
SUNLIGHT: Get 15-20 minutes of sunlight in the middle of the day (10-2 in winter) (11-3 summer) without sunscreen. These are the only times vitamin D can be stimulated in the skin.
FOODS: Cod liver oil, Salmon, Mackerel, Tuna in oil [but mackerel & tuna may have mercury], Sardines in oil, Herring, Milk, Cheese, Butter, Eggs, Beef Liver, Mushrooms.
SUPPLEMENTS: Take 800 – 1000 units of Vitamin D / day in the winter. Take more only if you have testing that supports a higher usage.
WARNING: Do not take vitamin D if you have Crohn’s Disease or Sarcoid Cancers – these conditions already make extra vitamin D.
FURTHER READING: Here are some useful links for further reading.
The council on cholecalciferol
Vitamin D fact sheet
Vitamin D public health information