Tag Archives: health

A Positive Addiction: More on the Feel-Good Influence of Sun Exposure.

Nearly every article written on the addictive influences of sun exposure or other UV exposure takes a negative tack. We need to realize that some addictions are very good for us. Some runners are addicted to getting up every morning and going on the morning run. If one wants to be slim and fit, that is certainly a positive addiction. Hugging my wife is also a positive addiction; her touch helps to heal me and fills me with an addictive love. I’m also addicted to hiking in the pines and aspens near my Nevada ranch. There is little more exhilarating than being at 11,000 feet elevation and breathing the clear mountain air during a hike. You probably have your own positive addictions.

Sun exposure can certainly become an addiction, but is that all bad? In my opinion, no. When done habitually, sunning reduces the risk of melanoma and reduced the risk of myriad harmful diseases. It is therefore a positive and salubrious addiction.

A recent study, somewhat negative in tone, demonstrates that UVB light, contained in both sun lamp radiation and sun radiation, triggers the production of beta endorphins, one of the feel-good chemicals, sometimes called a “reward” chemical, that makes us want more.[i] The researchers used 12 healthy volunteers and used a UVB lamp to deliver a dose of narrow-band UVB light. Skin samples were taken before and after the exposure. After 24 hours, the skin samples showed an increase in endorphin levels in 11 of the twelve subjects.

Sun exposure enhances health. A twenty-year study demonstrated that the risk of death among people who were sun-seekers was only half that of those who received little sun.[ii] The researchers made this statement: “In both models the summary sun exposure variables showed a ‘dose-dependent’ inverse relation between sun exposure and all-cause death.”

Obviously, habitual sun exposure produces a positive addiction, and that is good! God (or nature if you prefer) has programmed our bodies to seek the sunlight in order to help provide a healthful and rewarding life. “Habitual” is the operative word here. An occasional blast of sun that causes burning is definitely not recommended. Be careful and enjoy your positive addictions.

[i] Jussila A, Huotari-Orava R, Ylianttila L, Partonen T, Snellman E. Narrow-band ultraviolet B radiation induces the expression of β-endorphin in human skin in vivo. J Photochem Photobiol B. 2016 Feb;155:104-8.

[ii] Pelle G. Lindqvist, Elisabeth Epstein, Mona Landin-Olsson, Christian Ingvar, Kari Nielsen, Magnus Stenbeck & Håkan Olsson. 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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A new Mechanism of UVB is discovered; it may help Weight-Control and Health.

A most interesting (and very complex) research paper has discovered another way in which sun exposure may contribute to health and also demonstrates a mechanism by which the skin communicates with the brain.[i]

The researchers’ experiment involved using UVB radiation from a sunlamp on the skin of mice and then measuring, among other things, the influence of a signaling mechanism from the skin to the hypothalamus, which increased the quantity of a peptide hormone, known as alpha-melanocyte stimulating hormone (a-MSH). The hormone is important in stimulating pigmentation (melanin) production in the skin. It also has a role in energy balance, feeding behavior and energy homeostasis.[ii]

When the mice were radiated with UVB, their hypothalami received a neural signal which caused them to produce both a-MSH and b-Endorphin, which we all know to be one of the feel-good hormones, also called a reward hormone or natural “upper.” The researchers described this effect as being anorexigenic, meaning that it caused a loss of appetite. It seems that a loss of appetite combined with a natural “upper,” would be a good recipe for effective weight-control. Keeping the metabolism high is important to controlling weight, and the writers made an interesting statement regarding metabolism to end their paper:

“In conclusion, we have established a new paradigm of UVB induced activation of POMC signaling in the hypothalamus with attendant increases of a-MSH and b-END in the plasma which opens up exciting areas of research on the communication between skin and brain and that suggests a role for UVB in regulation of body metabolism.”

This was a recondite paper that took a lot of digging to get through. This would be my translation: “Get some sun exposure or sun lamp exposure; it will increase endorphin levels, rev up the metabolism and help you stay slim and healthy.”

Be safe while you sun, and remember that most sunscreens will stop UVB from doing its job.

There seems to be no end to the positive influence of sunlight on human health and well-being.

[i] Cezary Skobowiat and Andrzej T. Slominski. Ultraviolet B stimulates proopiomelanocortin signaling in the arcuate nucleus of the hypothalamus in mice. Experimental Dermatology, 2016, 25, 120–123.

[ii] Wikipedia. Alpha-Melanocyte-stimulating hormone. https://en.wikipedia.org/wiki/Alpha-Melanocyte-stimulating_hormone. (accessed February 12, 2016)

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Sun Exposure reduces Cardiovascular Disease independently of Vitamin D.

By Marc Sorenson, EdD  Sunlight Institute…

Dr. Richard Weller, a dermatologist and champion of sun exposure, has just published a review stating that sun exposure has cardiovascular benefits independent of vitamin D.[1] This is good news for those who fear having a heart attack or stroke. Cardiovascular disease, of course, is our number-one killer. Dr. Weller make several points in his review, as follows:

  1. Individuals with high serum vitamin D levels are at reduced risk of hypertension (chronic high blood pressure), cardiovascular disease and metabolic syndrome (a cluster of factors including abdominal obesity, high triglyceride levels, low HDL levels, high blood sugar levels and insulin resistance) that are linked to increased risk of cardiovascular disease and type 2 diabetes.
  2. However, multiple research reports show that oral vitamin D supplementation has no effect on those problems.
  3. But, epidemiological studies data show a correlation between increased sun exposure and reduced hypertension and death from cardiovascular disease.
  4. Scandinavian studies show a dose dependent fall in mortality (death) with sun-seeking behavior. In other words, the higher the sun exposure, the lower the risk of death from all causes. In fact, those with the highest sun exposure had half the risk of death as those with the lowest exposure
  5. The reduced risk of death among sun seekers is probably due to the nitric-oxide increasing effects of sun exposure.
  6. The higher the latitude in the Northern Hemisphere, the greater is the blood pressure. Populations at higher latitudes have far less sun exposure that those at low latitudes.
  7. In one study of risk factors for atheroma (plugging of the arteries), latitude was found to be the strongest predictor.

This is another potent argument for getting your share of the sun; it could save your life.

 

[1] Richard B. Weller. Sunlight Has Cardiovascular Benefits Independently of Vitamin D Blood Purif 2016;41:130–134.

 

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Sunlight may Prevent Chemically-Induced Skin Cancer.

By Marc Sorenson, EdD, Sunlight Institute

Sometimes we come across research, conducted many years ago, that carries a great message of health for those who seek the sun. In this case the research was done in 1988 and involved a study on mice that were given a chemical protocol designed to induce skin cancer.[1] Half of the mice were also given ultraviolet B (UVB) irradiation during that protocol. After 20 weeks of cancer a cancer initiation-promotion protocol with two carcinogenic chemicals, there were 75% fewer cancerous tumors per mouse in the mice that were irradiated UVB.

Another 24-week study reported in 1992 showed that 12 weeks of UV radiation, applied either before or after chemical initiation of cancer, resulted in a 61% reduction in the mice that were irradiated before the chemical treatments, and 50% in the mice that were irradiated during the treatments.[2]

The message is this: exposure to UV light from sunlamps or sunshine may be protective against skin cancer development. So what’s new? Many of us have been promulgating that message for many years, and this research simply shows that we were not the first to understand the cancer-preventive influences of sunlight.

[1] Gensler HL Prevention of chemically induced two-stage skin carcinogenesis in mice by systemic effects of ultraviolet irradiation. Carcinogenesis. 1988 May;9(5):767-9.

[2] Gensler HL, Simpson PJ, Powell MB.  Inhibition of 12-O-tetradecanoylphorbol-13-acetate-induced tumor promotion in murine skin by systemic effects of ultraviolet irradiation. Photochem Photobiol. 1992 Jul;56(1):25-30.

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Sleep Quality is improved by Exposure to Nature and Sunlight.

By Marc Sorenson, EdD, Sunlight Institute

A good, sound sleep is important to human health, both physical and mental. According to Dr. Diana Grigsby-Toussaint, “Studies show that inadequate sleep is associated with declines in mental and physical health, reduced cognitive function, and increased obesity.” She and her colleagues at the University of Illinois recently published a new study demonstrating that a natural environment may help people get the sleep they need.[1] The study showed that exposure to nature, which they dubbed “greenspace,” was associated with a more restful sleep. Other surroundings such as a sandy beach with an ocean view were also conducive to better sleep. One of the measurements used to qualify an area as greenspace was the availability of sunlight.[2]

I can attest to the fact that when I regularly walk through the pines and aspens located in the high mountains near my Nevada ranch, I sleep better at night. When I don’t get enough outdoor time in the trees and sunlight, I begin to suffer from what my friend, Dr. William Grant, calls nature-deficit disorder, or NDD. My whole mood is altered, and not for the better. Dr. Grant is not only a great sunlight scientist, but an avid birdwatcher, which takes him out daily do get his dose of nature.

We have a primal need for sunlight and natural surroundings, and too many city dwellers do not connect with sunlight and nature. Don’t fall into that trap. There is an adage that says, “What gets scheduled gets done.” Plan to be outside as often as possible and soak up some sun when it is available. Natural surroundings with sunlight are better than any psychiatrist or physician for maintaining mental and physical health.

[1] Grigsby-Toussaint DS, Turi KN, Krupa M, Williams NJ, Pandi-Perumal SR, Jean-Louis G. Sleep insufficiency and the natural environment: Results from the US Behavioral Risk Factor Surveillance System survey. Prev Med. 2015 Sep;78:78-84.

[2] http://news.aces.illinois.edu/news/u-i-study-men-people-over-65-sleep-better-when-they-have-access-nature.

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Vitamin D Society News Release: Restrictive Sun Exposure Poses Health Risks!

Marc Sorenson EdD, Sunlight Institute

Our purposes for the Sunlight Institute are to tell the truth about the marvelous benefits of sunlight and to help people to understand that they are being lied to by those who would frighten us out of the sun, aka the Sunscare Movement. A recent press release by the Vitamin D Society of Canada may go a long way toward those goals. The release summarizes information from a new study by Carole Baggerly and several of her academic colleagues, and “examines how entities such as World Health Organization’s International Agency for Research on Cancer and the U.S. Surgeon General call for sun avoidance, but ignore the fact that cutting out sunshine will reduce vitamin D, an essential vitamin for bone health, and create probable harm for the general population.” That statement is particularly true, I believe, for those living in Canada.

The release is excellent, but I only wish that they had mentioned the production of serotonin, endorphins and nitric oxide by sunlight—all of which have remarkable health influences on the human body and brain.

Nevertheless, this release is a must read and my hope is that it will be widely distributed. Truth marches on. Here is the link to the news release: http://www.newswire.ca/en/story/1570075/overly-restrictive-sun-exposure-warnings-pose-health-risk-says-new-study

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Sunshine, Blueberries, Nitric Oxide and Peak Sexual Function. Better than Viagra and Cialis?

By: Marc Sorenson, EdD Sunlight Institute–

Now that I have your undivided attention, let’s delve into this unusual title. On the Sunlight Institute site, I have discussed the healthful effects of nitric oxide (NO) several times; it is a potent vasodilator, meaning it relaxes the blood vessels, allowing the blood to pass more easily through the vessels. This relaxation, as might be expected, leads to lowered blood pressure.[1] [2]

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Sunlight Controls weight and improves health, independently of vitamin D

By: Marc Sorenson, EdD Sunlight Institute–

In a previous post, I mentioned that morning sunlight exposure correlated to a lower body-mass index (BMI), a measurement which is used to assess whether a person is obese, normal weight, overweight, etc.[1] It was obvious that production of vitamin D was not the mechanism that led to the slimmer bodies, because D production is greatest at midday.

The relationship of weight to sunlight has again been assessed in an impressive animal study. The researchers fed mice a high-fat diet to investigate the effects of vitamin D and/or ultraviolet radiation (UVR) (such as that in sunlight) on the potential to develop obesity, diabetes and other measures—a cluster of maladies known as the metabolic syndrome (MetS). Long-term UVR exposure significantly suppressed weight gain, glucose intolerance, insulin resistance, and fatty liver disease. It also suppressed blood levels of fasting insulin, glucose and cholesterol.[2] Interestingly, those benefits were not reproducible by vitamin D supplementation. However, when nitric oxide (NO) was increased by UVR exposure, many of the positive benefits were indeed duplicated.

The authors make a profound statement to conclude their research: “These studies suggest that UVR (sunlight exposure) may be an effective means of suppressing the development of obesity and MetS, through mechanisms that are independent of vitamin D but dependent on other UVR-induced mediators such as NO.”

The takeaway from this research is that we cannot simply throw a vitamin D capsule at a problem and expect it to take the place of the sun. That marvelous hormone, vitamin D, is critically important to human health, and the information here does not denigrate its importance; nevertheless, there are many other important sunlight products such as NO, serotonin, and endorphins that are essential to wellbeing. We need them all, and sunlight is the best source.

Stay slim and stay healthy by enjoying safe, non-burning sunlight.


[1] S.p://sunlightinstitute.org/morning-sunlight-may-lead-slimmer-figure

[2] Geldenhuys S, Hart PH, Endersby R, Jacoby P, Feelisch M, Weller RB, Matthews V, Gorman S. Ultraviolet radiation suppresses obesity and symptoms of metabolic syndrome independently of vitamin D in mice fed a high-fat diet. Diabetes. 2014 Nov;63(11):3759-69.

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Morning Sunlight May Lead to a Slimmer Figure.

By: Marc Sorenson, EdD Sunlight Institute —

 Chalk up one more benefit of sunlight—morning sunlight that is. A recent study from Northwestern Medicine demonstrates that timing and intensity of light correlate with body mass index (BMI).[1] BMI is a numerical computation that compares height and weight, and it is considered a good measurement to assess obesity or the lack thereof. A high BMI usually means that a person is obese or at least approaching obesity. Optimal BMI is 18-25. Below 18 is underweight, above 25 is overweight, 30 is obese and 40 and above is morbidly obese.This research showed that exposure to bright morning light was directly related to BMI. After adjusting for confounders such as diet, exercise and sleep timing, it was determined that very early exposure to morning light correlated remarkably to lower BMI; even when light intensity was equal at different times of the day, those who received earliest bright light had lower BMI. In fact, for each hour later in the day that the light exposure occurred, BMI increased by 1.28 units. This fact is exceptionally important, since a person who has a BMI of 25 (upper ideal range) could approach 30, or obesity, simply by the habit of sunlight exposure later in the day, i.e. 10:00 AM rather than 6:00 AM.The authors of this research suggested that the mechanisms involved in weight control by early light exposure could be the following: (1) resetting the circadian rhythm (internal clock), (2) the greater amount of blue light in morning sunlight and (3) effects on melatonin production. Whatever the reasons, we now know that early-morning sunlight is important to weight control. It may also be important to other health issues.Since we know that the greatest vitamin D production, as a result of sunlight exposure, occurs around noon, I would suggest enjoying some early sunlight to begin the day, and then to engage in moderate, non-burning sunbathing around midday to optimize vitamin D levels. That should produce the greatest benefits possible.



[1] Reid KJ, Santostasi G, Baron KG, Wilson J, Kang J, Zee PC. Timing and intensity of light correlate with body weight in adults. PLoS One. 2014 Apr 2;9(4)

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Is Australia Waking Up? Could their Stringent Sun-Avoidance Programs be Causing Bone Problems in Young People?

By: Marc Sorenson, EdD Sunlight Institute–

Hallelujah! At least some scientists in Australia are realizing that their sun-avoidance programs, probably the most draconian in the world, are causing health problems, particularly musculoskeletal disorders (bone, joint and muscle problems). According to this article, those maladies cause more disability than any other group of medical conditions and cost the Australian economy $9.15 billion per year.

The scientists are suggesting an increase in sun exposure; unfortunately, the amount of exposure they suggest is woefully inadequate to produce optimal health, but at least it is a step in the right direction. The scientists also state that ultraviolet radiation is the main risk factor for skin cancer. If they are talking about malignant melanoma, they are dead wrong. However, we must compliment them for suggesting regular sun exposure, a habit that could save millions of lives yearly.

Read the article.

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