Tag Archives: breast cancer

Vitamin D Levels Press Release. Remember Sun!

Vitamin D levels: sufficient for winter? By Marc Sorenson, EdD

Sunbeds good in winter for vitamin D.Vitamin D levels and sunshine are exceptionally important to human health, and therefore we should be aware of vitamin D science. The Vitamin D Society of Canada is always at the forefront of the research on vitamin D levels and sunlight. And, they deliver press releases to keep people from Canada (and the world) apprised of new and important findings. Hence, I would like to comment on the salient points of their latest release. As I do so, it is especially relevant to note that vitamin D levels are surrogate measures for sun exposure.

The relationship of vitamin D to sun exposure

Ninety percent of vitamin D levels in the blood is due to sun exposure.[1] The UVB portion of sunlight stimulates vitamin D production in skin. Therefore, a UVB light source, which produces vitamin D levels, is the best source in winter. Remember also that the press release information is true for the world, not just Canada.

 Salient points about vitamin D levels and sunlight: breast cancer

  • First of all, consider a breast-cancer study published in the scientific journal, Plos One.[2] It showed that women with the highest vitamin D levels had a reduced breast-cancer risk. Most noteworthy, women with levels > 60 ng/ml had 82% reduced risk, compared to those with levels < 20 ng/ml. Furthermore, there was a dose-response decrease. For each increase in vitamin D levels, there was a concomitant decrease is breast-cancer risk.

Vitamin D levels and Breast Cancer

  • Since we mentioned that vitamin D is produced by sun exposure, we should mention an Iranian sunlight-breast cancer study. In Iran, among women who totally avoid sun exposure, there is a 10-fold increase breast cancer risk.[3] That is an especially relevant fact for women who believe they should avoid the sun! And remember, melanoma is also reduced in those who are regularly exposed to sunlight.[4]

Another Vitamin D levels- and sunlight-deficiency cancer

  • It seems like if breast cancer is reduced by high vitamin D levels, the same relationship could exist for other cancers. Hence, the press release mentioned colorectal cancer as the second disease associated to low vitamin D levels or low sun exposure. And, it mentioned another important piece of research.[5] Participants with vitamin D levels below 12 ng/ml had a 31% higher risk of colorectal cancer. Those with levels above 30 ng/ml had a 27% reduced risk.

Other disorders associated with vitamin D levels

In addition, the press release mentions four other disorders where higher vitamin D levels reduce risk or improve the condition. The disorders: diabetes (81% reduced risk), multiple sclerosis (45% reduced risk), preterm birth (62% reduced risk) and poor cognitive function. As to cognitive function, those who spent the most time outdoors with the least sun protection, had better cognitive function.

Finally, this is an excellent press release regarding vitamin D levels and sunlight. I strongly suggest you read it. http://www.vitamindsociety.org/press_release.php?id=60 Also, see the previous blog regarding the vitamin D Society and vitamin D levels: http://sunlightinstitute.org/vitamin-d-canada-warning/

Vitamin D and sunlight are sine qua nons for health, and so are proper nutritional habits. Happy health! Be sure to read my book, Embrace the Sun, available at Amazon. Best book on sunlight and vitamin D

 

 

[1] Reichrath J. The challenge resulting from positive and negative effects of sun: how much solar UV exposure is appropriate to balance between risks of vitamin D deficiency and skin cancer? Prog Biophys Mol Biol 2006;92(1):9-16

[2] McDonnell SL, Baggerly CA, French CB, Baggerly LL, Garland CF, Gorham ED, Hollis BW, Trump DL, Lappe JM. Breast cancer risk markedly lower with serum 25-hydroxyvitamin D concentrations ≥60 vs <20 ng/ml (150 vs 50 nmol/L): Pooled analysis of two randomized trials and a prospective cohort. PLoS One. 2018 Jun 15;13(6).

[3] Bidgoli SA, Azarshab H. Role of vitamin D deficiency and lack of sun exposure in the incidence of premenopausal breast cancer: a case control study in Sabzevar, Iran. Asian Pac J Cancer Prev. 2014;15(8):3391-6.

[4] Vågero D, Ringbäck G, Kiviranta H. Melanoma and other tumors of the skin among office, other indoor and outdoor workers in Sweden 1961–1979. Brit J Cancer 1986;53:507–12.

[5] McCullough ML, Zoltick ES, Weinstein SJ, Fedirko V, Wang M, et al. Circulating Vitamin D and Colorectal Cancer Risk: An International Pooling Project of 17 Cohorts. J Natl Cancer Inst. 2018 Jun 14.

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Breast Cancer Anyone? Or would you prefer sunlight?

Breast cancer breakthrough. Soak up the sun and prevent breast cancer~By Marc Sorenson, EdD. Sunlight Institute

Stunning Breast Cancer research shows that the highest vitamin D levels associate with an 80% reduction in risk.[1] 

Is the breast cancer pandemic due to vitamin D deficiency?

First of all, as pointed out by the authors, numerous studies have shown an association between higher vitamin D level and breast cancer. But, other studies had not taken into consideration serum levels of vitamin D above 40 ng/ml. Why? Because that level had been considered the highest level needed for good health. Nevertheless, this study showed differences in breast cancer risk when comparing all serum vitamin D levels, and that made all the difference in the results. The research included 5,038 womenLearn to love non-burning sunlight and prevent breast cancer.

A dose-response association between vitamin D levels and breast cancer

The most noteworthy finding can be summed up in the study conclusions: “Higher 25(OH)D concentrations were associated with a dose-response decrease in breast cancer risk with concentrations ≥60 ng/ml being most protective.” In other words, the higher the vitamin D levels, the greater was the protection.

This fact is especially relevant: serum vitamin D levels in 90% of the population are effected by sun exposure. Hence, sun exposure may be the operative factor in the comparisons. Sun exposure causes the body to produce nitric oxide, serotonin, endorphin and brain-derived neurotropic factor (BDNF). Most noteworthy is that all of these photoproducts are vital to human health.

Is something besides vitamin D at work in preventing breast cancer?

Therefore, it could be that these additional photoproducts added power to the vitamin D produced by the sun. Could the “holistic” sun be more important than vitamin D alone? Of course it is! Another study, little known, may hold the answer. An investigation from Iran, on the association between breast-cancer risk and vitamin D, showed that low vitamin D predicted only a slightly increased risk of the cancer. However, among women who totally covered themselves and thereby had no sun exposure, there was a 10-fold increase in the risk of the disease.[2] In other words, there was a 1,000% increase in breast cancer risk due to sun deficiency.

Summary:

Finally, consider this: With the holistic sun, we get the entire package, not just vitamin D. Embrace the Sun, and don’t burn.

For more on the study, see the press release put out by the Vitamin D Society: http://www.vitamindsociety.org/press_release.php?id=58

Learn to love non-burning sunlight

[1] Sharon L. McDonnell , Carole A. Baggerly, Christine B. French, Leo L. Baggerly, Cedric F. Garland, Edward D. Gorham, Bruce W. Hollis, Donald L. Trump, Joan M. Lappe. Breast cancer risk markedly lower with serum 25-hydroxyvitamin D concentrations ≥60 vs <20 ng/ml (150 vs 50 nmol/L): Pooled analysis of two randomized trials and a prospective cohort. PLoS One. 2018 Jun 15;13(6)

[2] Bidgoli SA, Azarshab H. Role of vitamin D deficiency and lack of sun exposure in the incidence of premenopausal breast cancer: a case control study in Sabzevar, Iran. Asian Pac J Cancer Prev. 2014;15(8):3391-6.

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Of mice and men (or women): Sunlight reduces breast cancer beyond the effects of vitamin D. Another reason to embrace the sun.

Marc Sorenson, EdD, for breast cancer prevention. Prevent breast cancer with sunlight!

While many doctors know that ultraviolet radiation (UVR) from sunlight reduces risk of breast cancer, they have missed something. UVR stimulates production of vitamin D in human skin. Therefore, many health professionals assume that vitamin D is responsible for the reduced cancer risk. This may lead them to advocate the use of vitamin D supplementation and totally miss the bigger picture. In addition to vitamin D, UVR from sunlight or sunlamps produces many supplementary healthful photoproducts. Among others, nitric oxide, serotonin, endorphin and BDNF are produced by sunlight, and these photoproducts are vital to health. And, it is likely that these healthful photoproducts lead to an inhibition of breast cancer.

New research shows that sun exposure per se is capable of reducing the risk of breast cancer.

Consequently, it should not surprise us that for breast cancer, sunlight’s effects go beyond vitamin D.[1] Researchers at Children’s Hospital Oakland Research Institute, used a murine model (mice) that easily develops breast cancer, and treated them with UVR. Much as we might expect, they found that UVR treatments produced significant anti-cancer effects. Furthermore, they found that neither dietary vitamin D nor topical vitamin D influenced cancer risk. Because of their findings, they stated the following: “UVR’s inhibitory effects occur irrespective of whether or not the treatment increases circulating D3 in the mice.” Also, they made one more important comment regarding their research on breast cancer and UVR. “Therefore, supplemental D3 may not mimic all possible beneficial effects of UVR, and uncovering non-D3-mediated mechanisms of UVR tumor inhibition may lead to novel strategies for cancer prevention.”

An important point about vitamin D, sunlight and breast cancer.

Finally, there is no doubt that vitamin D has anticancer benefits. This research however, is especially relevant in that it corroborates what I have said in my soon-to-be-released book, Embrace the Sun. First of all, we must not put all of the benefits of sunlight in the vitamin D box. Secondly, sun exposure performs myriad miracles beyond vitamin D. One of those miracles may be breast cancer prevention and inhibition.  Thirdly, if we erroneously believe that we can obtain all of the sun’s benefits from popping a vitamin D pill, we may miss the holistic effects of the sun, which provide a cornucopia of salubrious results.

So, safely (without burning) embrace the sun and ease your mind about breast cancer.

[1] Anastasia M. Makarova, Flora Frascari, Parastoo Davari, Farzam Gorouhi, Philip Dutt, Lynn Wang, Akash Dhawan, Grace Wang, Jeffrey E. Green, Ervin H. Epstein, Jr. Ultraviolet radiation inhibits mammary carcinogenesis in an ER negative murine model by a mechanism independent of vitamin D3. Downloaded from cancerpreventionresearch.aacrjournals.org on April 12, 2018.

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Is the sunbed a Gianus Bifrons (two-headed god)?

Is the sunbed a Gianus Bifrons (two-headed god)?

Sunbeds, Good or bad?

Sunbeds may save lives.

Recent research comes to the conclusion that indoor tanning is a Gianus Bifrons,[1] which is interpreted as a two-headed god. One head, according to these researchers, is an increase in various skin cancers (a dubious claim). The other head is the ability of sunbeds to produce large quantities of vitamin D, increasing serum vitamin D concentrations up to two fold. In addition, this increase in vitamin D, they believe, could lead to a decrease in myriad diseases.

The authors of the paper state the following: “Therefore, some favorable effects [of tanning beds] against the risk of developing many human diseases, including non-skin cancers, cannot be excluded at first glance, although they may not be only linked to [higher] vitamin D status.” They also go on to suggest that more research should be performed to determine if the unfavorable effects of indoor tanning on skin cancers may be outweighed by the favorable benefits of amelioration of low vitamin D levels.

This research ignored many research studies showing that regular, non-burning sun exposure is protective against melanoma. In my upcoming book, Embrace the sun, about 14 different research studies are cited. All of these studies demonstrate a positive effect of sun exposure. There are also positive effects of sun exposure and sunbed exposure, beyond the ability to produce vitamin D. Nitric oxide (NO) is produced by both. NO is a vasodilator that lowers blood pressure and reduces the risk of heart disease.

No increase in melanoma!

Perhaps the most important study to differentiate between the positive effects and negative effects of sunbed exposure is this one: A 20-year Swedish study demonstrated that women who used sunbeds were 23% less likely to die from any cause than women who did not use them.[2] This study also showed no increase in melanoma after the 20-year period.

So, what more do we need to know about the pros and cons of sunbed use?

Here are a few more positive effects of sunbeds on human health:

  • Sunbed use reduces the risk of type 2 diabetes.[3]
  • Sunbed use strengthens bone.[4]
  • Sunbed use controls psoriasis and eczema.[5]
  • Sunbed use reduces chronic pain.[6], [7]
  • Sunbed use may help unborn children.[8]
  • Sunbed use reduces the risk of clots.[9]
  • Sunbed use is associated with lower breast-cancer risk.[10]
  • Sunbed use reduces the risk of death.[11]

[1] Giuseppe Lippi*, 1, Gianfranco Cervellin†, Elisa Danese. Indoor Tanning a Gianus Bifrons:

Vitamin D and Human Cancer. Advances in Clinical Chemistry 2017;20:1-16

[2] Lindqvist PG, Epstein E, Landin-Olsson M, Ingvar C, Nielsen K, Stenbeck M, Olsson H. Avoidance of sun exposure is a risk factor for all-cause mortality: results from the Melanoma in Southern Sweden cohort. J Intern Med. 2014 Jul;276(1):77-86.

[3] P.G. Lindqvist, H. Olsson, M. Landin-Olsson, Are active sun exposure habits related

to lowering risk of type 2 diabetes mellitus in women, a prospective cohort

study?, Diabetes Res. Clin. Pract. 90 (2010):109-114.

[4] Tangpricha V, Turner A, Spina C, Decastro S, Chen TC, Holick MF. Tanning is associated with optimal vitamin D status (serum 25-hydroxyvitamin D concentration) and higher bone mineral density. Am J Clin Nutr 2004;80:1645-49.

[5] Radack KP, Farhangian ME, Anderson KL, Feldman SR. A review of the use of tanning beds as a dermatological treatment. Dermatol Ther (Heidelb). 2015 Mar;5(1):37-51.

[6] Kaur M, Feldman SR, Liguori A, Fleischer AB Jr. Indoor tanning relieves pain. Photodermatol Photoimmunol Photomed. 2005 Oct;21(5):278.

[7] Taylor SL, Kaur M, LoSicco K, Willard J, Camacho F, O’Rourke KS, Feldman SR. Pilot study of the effect of ultraviolet light on pain and mood in fibromyalgia syndrome. J Altern Complement Med. 2009 Jan;15(1):15-23.

[8]  Bukhari, M. Quoted in London Times April 27, 2008.

[9] Lindqvist PG, Epstein E, Olsson H. Does an active sun exposure habit lower the risk of venous thrombotic events? A D-lightful hypothesis. J Thromb Haemost. 2009 Apr;7(4):605-10.

[10] Yang L, Veierød MB, Löf M, Sandin S, Adami HO, Weiderpass E. Prospective study of UV exposure and cancer incidence among Swedish women. J Intern Med. 2014 Jul;276(1):77-86

[11] Lindqvist PG, Epstein E, Landin-Olsson M, Ingvar C, Nielsen K, Stenbeck M, Olsson H. Avoidance of sun exposure is a risk factor for all-cause mortality: results from the Melanoma in Southern Sweden cohort. J Intern Med. 2014 Jul;276(1):77-86.

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Disrupted Circadian Rhythms predict Breast Cancer and other diseases. Can we reverse disrupted Rhythms by Camping regularly?

Benefits of sun exposure, by Marc Sorenson, EdD…

Interesting research regarding the critical necessity of sun exposure continues to mount.

There is no doubt that lack of sun exposure leads to disease, and a major factor in that scenario is a disrupted circadian rhythm. Researchers have stated that “Exposure to sunlight during the day, and darkness at night, optimally entrains biological rhythms to promote homeostasis and human health. Unfortunately, a major consequence of the modern lifestyle is increased exposure to sun-free environments during the day and artificial lighting at night.”[1] Night-shift work is one of the worst contributors to the disruption of our natural biological rhythms, also known as circadian rhythms, and it certainly defines the sun-free environment discussed. There is a strong association of night-shift work to many diseases, but one of the most prevalent of these is breast cancer.

So what is natural and good for the health? Researchers have shown that a disrupted circadian rhythm can be reprogrammed, or “entrained” by exposure to a natural summer, meaning a cycle of 14 hours, 40 minutes of summer light, to 9 hours, 20 minutes of darkness.[2]  The authors state that this “light-dark cycle programs the human circadian clock to solar time, such that the internal biological night begins near sunset and ends near sunrise.”

Such a cycle would certainly seems natural for humans who were raised on ranches or farms where the day’s activities begins early in the morning sunlight and usually end near sunset. I know, because that pattern described my youth. For primitive peoples, that cycle was probably a necessity to gather the food necessary for survival. It is now ingrained in to our DNA, and disruption leads to disease.

So how are circadian rhythms reset to help our health? According to the aforementioned research (footnote 2), it can be accomplished by either a week of natural light exposure, or a weekend spent camping in nature. I am a camper, and I know that when the sun goes down, I am ready to sleep, and when the sun rises the next morning, I’m ready to start my day’s adventures.

The message here is that daytime should be spent outside in natural light. This will probably reduce the risk of many diseases, including breast cancer. It is also imperative that our skin receives its sun exposure to produce vitamin D and other healthful photoproducts. In addition being outside in the sun will increase our production of serotonin and enhance our moods.

Safely embrace the sun and save your life! Be sure not to burn.

[1] Ball L, Palesh, O, Kriegsfeld L. The Pathophysiologic Role of Disrupted Circadian and Neuroendocrine Rhythms in Breast Carcinogenesis. Endocr Rev. 2016 Oct;37(5):450-466.

[2] Stothard ER, McHill AW, Depner CM, Birks BR, Moehlman TM, Ritchie HK, Guzzetti JR, et al.

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More Truth about Sun Exposure

By Marc Sorenson, EdD… Sun exposure benefits…

A very important paper regarding the necessity for sun exposure has recently been published by the journal Medical Hypothesis.[1] It is entitled Regular sun exposure benefits health, and it discusses the pros and cons of sun exposure. One of the salient statements in the paper is that intermittent sun exposure may increase the risk of skin cancer, whereas regular exposure to sunlight might benefit health. For those of us who have for years studied the beneficial effects of sun exposure, the use of the word “might” is the only drawback to the statement. There is no doubt that for the majority of the population, regular sun exposure absolutely protects and enhances health.

Among the diseases mentioned as being reduced or prevented by regular sun exposure are the following:

  1. Cancers: Colon, breast, prostate and non-Hodgkin lymphoma
  2. Multiple sclerosis
  3. Hypertension
  4. Diabetes

As the authors mention, most of these positive effects of sun exposure were previously ascribed to Vitamin D, but they point out that immune system function is enhanced by sun exposure beyond the effects of vitamin D, and list other non-vitamin D benefits of the sun, including:

  1. Production of nitric oxide
  2. Production of melatonin
  3. Production of serotonin
  4. Regulation of the circadian clock

I have discussed most of these items on the Sunlight Institute web site, but it was good to see new research that, in particular, separated the health benefits of sun exposure from vitamin D production. The idea that has become popularized during the past decade, that all benefits of sun exposure come from increased vitamin D production, is simply not true and can lead to the supplementation of vitamin D as a “cure” for diseases that may not be influenced by that hormone.

Of course, vitamin D is an exceptionally important photoproduct, and the only natural way to attain it is by exposure to the sun or to other sources of UVB light (such as a sunlamp or a tanning bed). The beauty of using these sources, rather than a vitamin-D capsule, is that all of the benefits of nitric oxide, melatonin, serotonin and circadian entrainment are included in the package.

Safely enjoy the sun, and you then will also safely enjoy better health. Remember not to burn, and to gradually develop a good tan.

[1]  van der Rhee H, de Vries, E, Coebergh, J. Regular sun exposure benefits health. Medical Hypotheses 97 (2016) 34–37

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Non-Melanoma Skin Cancer (NMSC), other Cancers and Sun Exposure. What is the Truth?

By Marc Sorenson, EdD. Sunlight Institute…

A 2016 paper in the British Journal of Dermatology showed that NMSC (also known as common skin cancer) had a positive association with cancers such as breast cancer, lung cancer and lymphoma.[1] Since NMSC is also associated with increased sun exposure, one might be inclined to say that these cancers are caused by such exposure. This is troubling, as many research papers have showed a reduced risk of most internal cancer with greater sun exposure. For example, breast cancer was the second type of cancer for which an inverse correlation between mortality rates and sun exposure was identified in the United States.[2] And, when assessing sun-exposure habits in a study of 5,000 women, scientists determined that those who lived in the sunniest areas, and who also had the highest sun exposure, had a 33% reduction in breast cancer rates compared to those who had the least exposure.[3] A subsequent study by the same group found “that a high sun exposure index was associated with reduced risk of advanced breast cancer among women with light skin pigmentation.”[4] The reduced risk was 47%. Numerous additional studies have demonstrated a reduction of the risk breast cancer among women who are regularly exposed to the sun. A discussion or these studies will me available in the book, Embrace the Sun, which should be available before the end of the 2016.

As for lung cancer, a geographical study in China demonstrated that lung cancer mortality showed a strong inverse correlation of risk with sun exposure, with an estimated 12% fall per each 10 milliwatts per meter squared per nanometer (a measurement of sun intensity) increase in UVB irradiance (sun exposure) even if adjusted for smoking.[5]

Now let’s consider lymphoma. The most recent research shows that there is an inverse correlation between Hodgkin lymphoma (HL) and the highest vs. lowest lifetime, childhood and adulthood factors: sun exposure, sun-lamp exposure, and sunburn. [1] The pooled analysis showed an odds ratio of .56, or in other words, a 44% reduced risk of contracting the disease.[6] Two items particularly stand out in this research: (1) Sun-lamp use correlated to a reduced risk of the disease—a positive result for the much maligned tanning industry—and (2) sunburn also correlated to a reduced risk. Of course, no one would recommend sun-burning—it simply serves a surrogate measurement for a high degree of sun exposure. Sun exposure can easily be used in high quantities—without burning—by moving out of the sun when the skin begins to redden, and then coming back later, after the skin has adjusted and started to tan.

Therefore, there is an interesting dichotomy between the idea that sun exposure may contribute to the three mentioned cancers, and the fact that all of these cancers have been shown to associate with low sun exposure, and be protected against by higher sun exposure.

So what is the answer? Dr. Bill Grant has found it. When people contract NMSC, they are advised to avoid the sun, thus setting themselves up for increased cancer risk.[7] Thanks again to Dr. Grant for his immediate solution to this dilemma.

There is more than sufficient research to show conclusively that most major cancers are prevented by plenty of sun exposure. Don’t be misled. Be sure to obtain some safe sun exposure whenever possible.

[1] Ransohoff KJ, Stefanick ML, Li S, et al. Association of non-melanoma skin cancer with second non-cutaneous malignancy in the Women’s Health Initiative. Br J Dermatol. 2016 May 26. [Epub ahead of print]

[2] Garland FC, Garland CF, Gorham ED, Young JF. Geographic variation in breast cancer mortality in the United States: a hypothesis involving exposure to solar radiation. Prev Med. 1990 Nov;19(6):614-22.

[3] John EM, Schwartz GG, Dreon DM, Koo J. Vitamin D and breast cancer risk: The HANES 1 epidemiologic follow-up study, 1971-1975 to 1992.  Cancer Epidemiology Biomarkers and Prevention 1999;8:399-406.

[4] John EM, Schwartz GG, Koo J, Wang W, Ingles SA. Sun exposure, vitamin D receptor gene polymorphisms, and breast cancer risk in a multiethnic population. Am J Epidemiol. 2007 Dec 15;166(12):1409-19.

[5] Chen W, Clements M, Rahman B, Zhang S, Qiao Y, Armstrong BK. Relationship between cancer mortality/incidence and ambient ultraviolet B irradiance in China. Cancer Causes Control. 2010 Oct;21(10):1701-9.

[6] Monnereau A, Glaser SL, Schupp CW, Ekström Smedby K, de Sanjosé S, Kane E, Melbye M, Forétova L, Maynadié M, Staines A, Becker N, Nieters et al. Exposure to UV radiation and risk of Hodgkin lymphoma: a pooled analysis. Blood 2013;122(20):3492-9.

[7] Grant WB. Increased risk of non-cutaneous malignancy after diagnosis of non-melanoma skin cancer may be due to sun avoidance. Br J Dermatol. 2016 Jul 15. [Epub ahead of print].

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Sunlight suppresses Cancer: We have known for a Long Time.

By Marc Sorenson, EdD.  Sunlight Institute….

While reading one of Dr. Michael Holick’s latest publications,[1] I was intrigued that he quoted from a book published in 1915 called The Mortality from Cancer throughout the World.[2] That book stated that indoor workers had 8 times the risk of dying of cancer compared to outdoor workers. Would this old study make you want to avoid sun exposure? Not unless you have a death wish!

Then, in 1937 Dr. Sigismund Peller determined that deadly internal cancers were 40% less common among people who spent long hours in the sun.[3] A few years later Dr. Frank Apperley did research that demonstrated the following: North American death rates for major cancers among the inhabitants of cities between 30˚ and 40˚ north latitude were 85% higher than death rates among inhabitants of cities between 10˚ and 30˚; inhabitants of cities between 40˚ and 50˚ north latitude had cancer death rates 118% higher than those between 10˚ and 30˚; inhabitants between 50˚ and 60˚ had death rates from internal cancers 150% higher than those between 10˚ and 30˚.[4]

There have been myriad studies in modern times, and one of the most compelling demonstrated that among women who totally covered themselves and thereby had no sun exposure, there was a more than a 10-times increase in the risk of the breast cancer.[5] Stated in another way, that is a 1,000% increase in risk due to sun deficiency.

Do you think it is about time that we decided that sunlight is good for us? Just be sure not to burn.

[1] Holick, M. Biological Effects of Sunlight, Ultraviolet Radiation, Visible Light, Infrared Radiation and Vitamin D for Health. Anticancer Research 36: 1345-1356 (2016).

[2] Hoffman F The mortality from cancer throughout the world, Newark, N.J., The Prudential Press, 1915.

[3] Peller S. Carcinogenesis as a means of reducing cancer mortality. Lancet 1936; 2:552-56.

[4] Apperley, F.  The relation of solar radiation to cancer mortality in North America. Cancer Res 1941;1:191-95.

[5] Bidgoli SA, Azarshab H. Role of vitamin D deficiency and lack of sun exposure in the incidence of premenopausal breast cancer: a case control study in Sabzevar, Iran. Asian Pac J Cancer Prev. 2014;15(8):3391-6.

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Two more Pieces of Research that are positive for Tanning Beds

By Marc Sorenson, EdD.   Sunlight Institute

Although I occasionally try to balance the messages about tanning beds, this blog is meant neither to discourage nor promote their use. The readers should make up their minds after weighing the evidence. In a recent blog, I mentioned some positive messages about tanning-bed use, which included the following:[1] Note: all references for the following list are found in the blog under footnote 1.

  1. Tanning-bed use is associated with a reduced risk of clots.
  2. Tanning-bed use is associated with increased vitamin D levels.
  3. Tanning-bed use is associated with stronger bones
  4. Tanning-bed use can cure psoriasis and eczema and tanning beds are often recommended by dermatologists.
  5. Tanning-bed use more than three times yearly is associated with a 40-50% reduced risk of endometrial cancer.
  6. Tanning-bed use is associated to lower breast-cancer risk.

After I posted the above information, a friend from Canada reminded me of research by Dr. Pelle Lindqvist and his colleagues, which demonstrated that both sun exposure and tanning-bed exposure reduced the risk of death during a 20-year study.[2] Women who used tanning beds were 23% less likely to die of any cause than women who did not use them.

In addition, I remembered an older study that showed that tanning beds were able to take winter vitamin D levels up to summer levels in a period of five weeks.[3]

So, along with the bad rap tanning beds are receiving, there is some good news. Who wouldn’t want to live longer in better health? Still, as with all decisions, weigh the evidence and then decide.

[1] http://sunlightinstitute.org/defending-the-sun-from-the-lies-damn-lies-duplicity-deception-death-and-disease-of-the-anti-sun-business-part-3/

[2] Lindqvist P. Epstein E, Landin-Olsson M, Ingvar C, Nielsen K, Stenbeck M, Olsson H. Avoidance of sun exposure is a risk factor for all-cause mortality: Results from the Melanoma in Southern Sweden cohort

[3] Moan J, Lagunova Z, Cicarma E, Aksnes L, Dahlback A, Grant WB, Porojnicu AC. Sunbeds as vitamin D sources. Photochem Photobiol. 2009 Nov-Dec;85(6):1474-9.

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A Letter to a Vegan Friend with a triple compression Fracture

By Marc Sorenson, EdD.   Sunlight Institute….

I sent this letter to a good friend who just suffered a triple compression fracture while doing yoga. She is a dynamic and accomplished person who has been a competitive athlete for much of her life, and has helped many people to save their lives from various diseases through her books and lectures. Many would think her vegan lifestyle would have protected her against weak bones. However, after having a common skin cancer appear on her body, her dermatologist told her to avoid the sun. She stopped most of her sun exposure and didn’t take vitamin D. Her bones had previously been exceptionally strong for her age. Obviously, the change in sun habits had very deleterious effects, as I explained in the letter. Her name has been changed for the purpose of this blog.

Dear Barbara,
It is great to hear from you! I only wish the circumstances were better for you.
Unless you are  sunbathing regularly, the recommendation for 1,000 IU of vitamin D is woefully inadequate. For someone with weak bones, 5,000 IU would be my suggestion. Does my memory serve me right about your having a skin cancer? If you started avoiding sun exposure after that time, then that is the reason for your bone weakness. Sun exposure is the best way to obtain vitamin D and many other photoproducts such as nitric oxide and serotonin. Endorphins are also produced by sun exposure.
Women in Spain who actively seek the sun have about 9% of the risk of a fracture as women who stay indoors. Or stated another way, women who avoid the sun have 11 times the risk of fracture. And of course, the few fractures experienced by sun seekers are probably due to some traumatic incident, not weak bones. Sunning per se is far more effective than vitamin D supplementation per se for producing and maintaining strong bones. Sun exposure is also far more effective that a vegan diet, although the diet certainly reduces the risk. Nonetheless, vegans who avoid the sun, because they believe their alkaline diet will totally protect them, are setting themselves up for fractures. Athletes who believe that exercise will protect them are also making a mistake. Sun is the great bone protector.
For light-skinned Caucasians, 20 minutes of unprotected sun exposure at midday, on each side of the body, will produce about 20,000 IU of vitamin D. Naked at noon is the best, if you can find a place to be private. Don’t burn as your skin becomes used to it. Remember also that melanoma, the deadly skin cancer, is about twice as common among indoor workers as outdoor workers who are habitually in the sun. Occasional blasts of sun that burn you, however, may increase the risk. Don’t burn. “Habitually” is the operative word for sunbathing.
The non-melanoma skin cancers(NMSC), aka common skin cancers, are a different story; sun exposure does increase the risk. However, these cancers are almost never fatal, and if caught early can be removed immediately. People who have high numbers of these cancers have far fewer melanomas. Also, your diet of dark greens and colorful fruits such as blackberries, raspberries, pomegranates, is protective against developing these cancers.
Remember also that sunscreens are deadly and their use is associated with an increase in melanoma. They will halt vitamin D production by about 99% in the area that is covered with them.
I would suggest that you go to my blog site, http://sunlightinstitute.org/ and search osteoporosis, bone and fracture. I wrote a short article last week on osteoporosis in sunny areas (reason: too much indoor living, and too much clothing). There are many more blogs on the site that talk about bone strength. Go to News and then use the search bar there.
Another suggestion. If you still have my book Vitamin D3 and Solar Power, read the section on bone health. There is much more information now, but the information in the book will serve as a guide.
My new book, Embrace the Sun should be available sometime this summer.
One last thought, women who totally avoid the sun are at 1,000% increased risk for breast cancer compared to women who are regularly exposed.
Sunshine and blessings,
Marc
Don’t make Barbara’s mistake. Safely soak up some midday sun and preserve your bones.

 

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