Wednesday, June 17, 2020


Sunlight and Health: by Marc Sorenson, EdD

Sunlight and health is an article written to fulfill a request from Grassroots Health (GRH). GRH is a marvelous organization; its purpose is to promote the healthful benefits of vitamin D (and sunlight).

Sunlight and health, from the earliest human civilizations to our current battle with COVID-19, have an inseparable link. Dr. John Fielder’s exceptionally well-written paper, History of Heliotherapy, provides insight into the past. Many ancients deified sunlight. The populations of those times had no doubt of its healing powers. Hippocrates, the Greek physician known as the “father of medicine,” recommended sunbathing and had his own large solarium, an enclosed area for sunning. In addition, the ancient Romans, used thermae (hot tubs and baths) that were equipped with solaria. The Roman philosopher Pliny wrote, “Sun is the best remedy.”

Sunlight and health maintained a link well into the 20th century.

In the early 19th Century, scientists began to experiment with heliotherapy (sunlight therapy) as a healer. They were duly impressed with their results. Therefore, they attempted to build a new system of therapeutics based on heliotherapy. In 1857, Madame Duhamel exposed children with TB to sunshine because it hastened their recovery. Many other doctors also used heliotherapy with great success. Dr. Fielder said that sunbathing was so successful, all doubt as to its place in the hygienic system was ensured.”

Though nothing has really changed, regarding sunlight and health, doubts about the relationship have crept in.

In the early 20th Century, people noticed that farmers developed common skin cancers on their faces and hands. This news began the war on sunlight. Nevertheless, the sun held its own for some time, because research also showed sunlight had anti-cancer properties. This idea triggered a 1932 editorial in The Lancet medical Journal. It suggested sunlight was so effective in promoting health, that the government should reserve public areas for nude sunbathing! (Dawson, Lord. Naked and Unashamed. Lancet 6, 1932:688.)

Then, the tide began to turn. Scientists completely misrepresented the association of common skin cancers and melanoma:

Due to this egregious misrepresentation, scientists decided, regrettably, that that sunlight must cause melanoma, the deadly skin cancer. A new fear had been born, along with a new industry-sunscreen and new medical profits. Even though moderate, regular sun exposure protects against melanoma, this fear-vs-fact based decision launched an all-out assault on the sun. Moreover, it continues today. Unfortunately, it has also become ‘rewarding’ to the industry that provides tanning lotions and treatments for the cancers. View this video by Dr. Edward Gorham to learn more about this subject: Vitamin D: Skin Cancer/Sunscreen – the Dilemma.

To dispel the myths, here are the facts about melanoma:

Seventy-five percent of melanomas occur on body areas seldom exposed to sunlight.

In the U.S., as sun exposure has decreased by about 90% since 1935, melanoma incidence has increased by 3,000%. Documentation in Embrace the SunSee the graph below.

As in the US, while sun exposure in Europe has profoundly decreased, there has been an exponential increase in melanoma.

Men who work outdoors have about half the risk of melanoma as men who work indoors.

Outdoor workers, while receiving 3-9 times the sun exposure as indoor workers, have had no increase in melanoma since 1940.  Melanoma incidence in indoor workers has increased steadily and exponentially.

Sunscreen invention, and its steadily increasing use, has not reduced the risk of melanoma. In fact, melanoma increased as sunscreen use increased. Documentation in Embrace the Sun.

Because of all this, increasing melanoma incidence significantly correlates with decreasing personal annual sunlight exposure.

Outdoor workers do get numerous sunburns and still have a dramatically lower risk of contracting melanoma.

Thus, melanoma increases as sun exposure decreases. Therefore, there is much need to provide the education and data to everyone so they can avoid blaming the sun.

Here are more facts about melanoma and its prevention:

Another cause is alcohol; those persons in the highest fifth of alcohol consumption have a 65% increase in melanoma risk.

In addition, meat consumption may increase melanoma risk by 84%.

Furthermore, daily fruit consumption may reduce the risk of melanoma by nearly 50%.

Persons with the highest levels of PCBs (banned industrial chemicals) have 7-times the melanoma risk as those with lowest levels.

There is a positive association between melanoma and obesity. It is also interesting to note that the increases in both diseases have progressed in unison.

Furthermore, the highest number of new melanoma cases are in Utah, followed closely by Vermont, Minnesota and New Hampshire. Another “surprising” fact is that by far the lowest number of new cases are in Texas.

So, since melanoma continues to increase in lock step with reduced sun exposure, should we continue to blame the sun?

We have destroyed the misconception that sunlight is a major cause of melanoma. Let us proceed to the magnificent health-protective effects of regular, non-burning sun exposure against other diseases:

Research from Indonesia shows COVID-19 deaths are 20 times higher among those with vitamin D levels less than 20 ng/ml. That is, when compared to those with levels greater than 30 ng/ml. Consequently, had the researchers had subjects vitamin D levels greater than 50 ng/ml, I would predict no deaths at all. In addition, remember that sun exposure to the body produces 90% of serum vitamin D levels (in the overall population). Therefore, we see the profound effect sun exposure could have on COVID-19.

Indonesians have taken this research seriously. Below is a photo of Indonesian men “social distancing” in the sunlight.

Another fact about sunlight and health with Covid-19

Recent research from the Department of Homeland Security (DHS) showed another interesting aspect of sun exposure’s influence on Covid-10. They demonstrated that direct sunlight “quickly” killed all Covid-19 viruses both in aerosols and on objects. Thus, sunlight not only stops the disease inside the body, but also stops transmission of the disease outside the body. This makes sunlight a powerful, two-edged sword against the disease.

Sunlight and Health: More facts regarding the influence of sun exposure on disease.

Influenza diminishes almost to nothing during late spring, summer, and early fall – times of greatest sun exposure. See the chart below, produced by the WHO and provided by Goran Olsson of Moscow, Russia.


Yet, we do not yet have annual data for COVID-19, a “flu-like” disease. However, it did emerge in the northern hemisphere in winter when sun exposure and vitamin D levels are low.

Women who sunbathe regularly have half the risk of death, over a 20-years period, compared to those who stay indoors.

In addition, a Spanish study shows that women who seek the sun have one-eleventh the hip-fracture risk as sun avoiders.

Another fact is that those who avoid sun have 10-times the breast cancer risk as those who embrace the sun.

Multiple sclerosis (MS) is highest in areas of little sunlight and virtually disappears in areas of year-round direct sunlight.

Additionally, sun exposure decreases heart disease risk through nitric oxide production.

Sun exposure improves mood through production of serotonin and endorphin.

Morning sun exposure resets the circadian rhythm, which synchronizes physical, emotional and mental processes and associates with lower cancer rates.

Those persons who spend many hours daily outdoors have only 1/50 the risk of Parkinson’s disease.

For each death caused by diseases associated with sun exposure, there are 328 deaths due to diseases associated with sun deprivation.

Sun exposure increases the production of BDNF (Brain-Derived Neurotrophic Factor), essential to nerve function and protection.

Furthermore, sunlight produces up to 20,000 IU of vitamin D in 20 minutes of exposure at midday in sunny seasons.

In England, vitamin D deficiency in children increased by 83 times during a 14-year period. That is likely due to indoor living and sunscreen use.

Finally, as part of my analysis of sunlight’s positive powers, I, and my coauthor, Dr. Bill Grant, performed a death analysis.

First of all, we assessed the number of deaths caused by diseases associated with high sun exposure. In addition, we performed another analysis of the number of deaths associated with diseases of sun deprivation. Here are the deaths for diseases associated with low sun exposure:

Diseases associated with low sun exposure in the USA

Rheumatoid arthritis19982,060
Bladder cancer201616,390
Brain cancer201616,050
Breast Cancer201640,980
Cervical cancer20164,074
Colon cancer201649,190
Endometrial cancer201610,470
Gallbladder cancer20163,710
Kidney cancer201614,240
Lung cancer2016158,080
Multiple myeloma201612,650
Oral and pharyngeal cancer20169,570
Ovarian cancer201614,240
Pancreatic cancer201634,920
Prostate cancer201626,120
Thyroid cancer20161,980
Cardiovascular disease2015801,000
Crohn’s disease2004825
HIV – AIDS20136,995
Necrotizing fasciitis2010200
Total annual deaths, approximated1,684,677

There were few deaths from diseases associated with high sun exposure-approximately 5,125.

Consequently, there are, according to our calculations, approximately 1,684,677 yearly deaths caused by diseases associated with low sun exposure. This compares to 5125 deaths from diseases associated with high sun exposure, and produces a ratio of approximately 328:1. Therefore, based on this analysis we concluded that it defies common sense to continue the anti-sun campaigns prevalent today. This ratio demonstrates that regular, non-burning sun exposure (without sunscreens), is desirable. It should be encouraged as a prudent precaution. It would to yield a highly beneficial effect on health and well-being. This ratio should make anti-sun advocates think twice about suggesting that we avoid sun exposure. This is particularly important for African Americans, who have the highest risk of death from Covid-19.

With COVID-19 attacking us like a bad horror movie, we must act now to stop the carnage, and bring the citizens back into the sunlight. Sunlight is a requirement for optimal human health.

For more information on sunlight and health, visit and read the book, Embrace the Sun.Read this book

Happy sunning!