Lack of Sunlight Linked to Pancreatic Cancer | Alternative Cancer Remedies Blog

Date: 05/16/2015    Written by: Beth Levine

Lack of Sunlight Linked to Pancreatic Cancer

Lack of Sunlight Linked to Pancreatic Cancer | Alternative Cancer Remedies Blog

Let's face it, not every region of the world has the sunny climate of southern California or an island off the coast of Africa. While the weather may be one small factor that we consider when deciding where to live, it is rarely the most important one. But for the sake of our health, we just might want to give a city's weather a little more weight when it comes to choosing a residence. According to new research, living in a cloudy area may put you at higher risk for pancreatic cancer.

The study, which took place at the University of California, San Diego School of Medicine, found that people residing in locations that have little regular sunlight may be more likely to eventually develop pancreatic cancer.1 The findings were based on a comprehensive analysis of data gathered from more than 100 countries around the world. The scientists compared total average cloud cover with the incidence rate of pancreatic cancer in each nation. The focus was on a lack of sun exposure because that can cause a drop in the body's vitamin D production.

The results show that those who live in sunnier regions, especially areas closer to the equator, have an astounding one-sixth of the occurrence rate of pancreatic cancer as do the people who live in places farther from the equator where cloud cover is common. Even after the researchers controlled for potentially influential factors such as age, obesity, smoking, and alcohol use, the numbers held firm. While this does not prove cause and effect, it strongly suggests that the risk of developing pancreatic cancer is affected by whether we have adequate levels of vitamin D, which we cannot satisfactorily produce when we get little exposure to the sun.

And while you can make up some of the necessary vitamin D you might be missing through your diet, it is difficult to reach adequate intake levels through food alone. The recommended daily allowance of vitamin D is 600 IU for most adults. The best dietary sources of vitamin D are salmon, swordfish (watch out for the mercury), and other fatty fish as well as fish liver oils. Sardines and eggs have a small amount naturally, and fortified foods including some cereals, milk, and juice also offer some vitamin D. However, you would need many servings a day of most of these foods to reach an adequate intake of the vitamin. And keep in mind, almost all of the vitamin D used to supplement foods is D2, the synthetic, less effective form of D.

Based on this study, a link between too little vitamin D and pancreatic cancer is a scary possibility. Pancreatic cancer is the twelfth most common form of the disease but fourth leading cause of cancer-related death according to the National Cancer Institute. The majority of cases are not discovered until the malignancy has spread because it is often asymptomatic while growing in the pancreas.

Nor is pancreatic cancer the only condition that has been associated with how much vitamin D you're getting. In earlier studies, this team of investigators discovered evidence that having higher levels of vitamin D decreased the risk of developing both breast and colorectal cancer.2 New research at other institutions is providing mounting evidence as to the vital importance of vitamin D in other aspects of our health as well. A recent study published in Nature Reviews Cardiology has found a higher incidence of heart failure in individuals with low vitamin D levels.3 Another investigation that took place at the Monash University Medical Centre in Melbourne, Australia, discovered a high prevalence of vitamin D deficiency in patients with lupus.4 And studies have shown that low levels of vitamin D can trigger a gene response that has been linked to MS.

This is all adding up to suggest that if we want to stay healthy, we should go to great lengths to ensure that we are getting enough vitamin D. But how does one do that, short of dropping everything and moving to equatorial Brazil? Even if you live in a northern latitude or a place where you can go days without seeing the sun, it is possible to get enough exposure, you may just have to try a little harder. Skip the sunblock and spend 10 or 15 minutes outside on every sunny day. As much as sunblock is wonderful for protecting the skin from harmful rays, we do need a little natural sunlight and these products prevent the production of vitamin D.

Consuming foods with vitamin D can also help, particularly if you partake of fatty fish and fish liver oils. (But watch out for the mercury.) And supplementing with 1,000 to 2,000 IU of vitamin D3, the form that actually works, will help you maintain beneficial vitamin D levels. To learn more about this essential vitamin, check out Jon Barron's in-depth newsletter Vitamin D Nonsense.

  • 1. Dotinga, Randy. "Cloudy Climes May Up Risk of Pancreatic Cancer." WebMD. 30 April 2015. Accessed 6 May 2015.
  • 2. Garland, Cedric F.; et al. "The Role of Vitamin D in Cancer Prevention." American Journal of Public Health. February 2006. Accessed 7 May 2015.
  • 3. Mearns, Bryony M. "Link between low vitamin D and heart failure." Nature Reviews Cardiology. 28 April 2015. Accessed 8 May 2015.
  • 4. Yap, KS; et al. "Association of low vitamin D with high disease activity in an Australian systemic lupus erythematosus cohort." Lupus Science & Medicine. 8 April 2015. Accessed 8 May 2015.

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    Submitted by Eric Freeman on
    June 2, 2015 - 2:50pm
    Boulder , Colorado

    This is an irresponsible article in my opinion. You are telling people to go out in the sun and expose themselves to cancer-causing UV radiation for 10-15 minutes a day without necessarily getting any benefit of producing Vitamin D. The problem is that you neglected to mention that in order to produce any Vitamin D from the sun, the sun needs to be at least 50 degrees high in the sky. This depends on one's latitude, time of year, and time of day. I'm actually all for exposing myself without sunblock for these 10-15 minutes a day. However, if it's done when the sun is lower than 50 degrees in the sky (which is the majority of the time actually, and in some places, all the time) you are just wasting your time, exposing yourself to harmful rays, and walking away thinking you got a dose of vitamin D! Please correct this critical omission.

    Submitted by BaselineFoundation on
    June 4, 2015 - 5:45pm

    The article was not designed to provide all the nuances of getting your vitamin D from sunlight but, rather, to talk about a study that found an association between sunlight exposure and a reduced incidence of pancreatic cancer. The article did point out that the closer you lived to the equator (i.e., the higher the sun was in the sky), the lower the incidence of pancreatic cancer. That said, the guidelines you offer actually only scratch the surface. You forgot to mention a number of other factors that influence how much vitamin D your skin produces, such as:
    · Age. Young skin produces more vitamin D than old skin
    · Weight. Obesity slows down production
    · Skin color. Light skin produces more than dark skin.
    · Body position. You produce anywhere from 2-10 times more vitamin D if you are lying down, as opposed to being in a standing position when getting your sun exposure.

    The bottom line is that given the same 50 degree sun, it can take you anywhere from as little as 15 minutes if you are lying down and sunbathing to produce 4,000 IU of vitamin D to as long as 9 hours if you are elderly, obese, dark skinned, and out playing golf in the sun.

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