Today I happened to run across research that stunned me while also making me very happy. A study from New Dehli, India has concluded that babies should sunbathe at least 30 minutes weekly. The reason is that most mothers, and their babies are severely vitamin D deficient, and that rickets, which is a vitamin D deficiency disease, is rampant in that country. The authors said that 90% of the vitamin D requirement could be met from sun exposure. That is a strange statement, considering that sun exposure could easily take care of 100% of the vitamin D requirement.
Oher good things to come from this study: the recommendation for the best sunbathing time was between the hours of 10:00 AM and 3:00 PM, exactly the times that most dermatologists say we should avoid like the plague.
A downside of the report was that the scientists recommended on 40% of the body surface to receive sun exposure. Whole-body exposure would have provided a lot more vitamin D and in a much shorter period of time. Another downside was the recommendation to achieve a serum vitamin D level of 20 ng/ml, which is woefully low. They should have recommended at least twice that level.
The report stated that “sunning” the babies would benefit more than 16 million born each year in India.
It is interesting that sometimes it takes a disaster like rickets for the truth to come full-circle and for common sense to prevail. For example, In the 1930s, when the medical community had not yet bought into the sun phobia of today, the Department of Labor printed a pamphlet called Sun for Babies in which they made this statement: “Every mother who wishes her baby to have robust health should give him regular sun baths from early infancy until he is old enough to play in the sun himself. If the sun’s rays are to help the baby grow properly and to prevent rickets, they must fall directly on the skin and tan it.” That would not be popular advice today, and it is likely that any parent practicing “baby tanning” would be arrested for child abuse. Since the 1930’s the dermatological profession has come a long way… in the wrong direction.
Other research related to bone growth in children shows that those who are growth-hormone deficient, and are being treated for that deficiency, grow more rapidly during summer months. In a one-year study using 118 children from 14 countries as subjects, growth was measured and compared to the amount of sun received by the children. Those who were exposed to more sun had faster growth.
The truth will prevail. The advice to keep children out of the sun has been an unmitigated disaster. Just be sure to keep them safe from sunburn.
 Research matters. 9/14/17. https://researchmatters.in/shots/infants-should-sunbath-30-minutes-week-recommends-study.
 De Leonibus C, Chatelain P, Knight C, Clayton P, Stevens A. Effect of summer daylight exposure and genetic background on growth in growth hormone-deficient children. Pharmacogenomics J. 2015 Oct 27.[Epub ahead of print].
A review published in the journal Nutrients discusses a great deal of research that indicates vitamin D provides protection against internal infection. It regulates both innate (inborn, quick acting, short lived) immunity and acquired (promoted by response to an invasive organism and producing a long-lasting effect) immunity.
The researchers extoll the virtues of vitamin D in increasing the strength of both forms of immunity, and state that vitamin D deficiency is associated with an increased risk for various infections, including HIV, respiratory tract and HCV infection. However, when discussing the efficacy of vitamin D supplementation, they state that “robust data from controlled trials investigating the use of vitamin D as a preventive or therapeutic agent are missing.”
Unfortunately, the researchers indicate that sun exposure would be a good way to obtain vitamin D in correct amounts, but then destroy that argument by stating that …”UVB radiation is also the main cause of human skin cancer, thus it is difficult, if not impossible, to make a general recommendation to expose the skin to the sun for sufficient vitamin D synthesis.”
They are wrong, of course. Common skin cancers cause very few deaths, and melanoma, the deadly cancer, is far less common in people who are regularly exposed to sunlight, compared to those who avoid the sun. Outdoor workers have about half the risk of contracting melanoma as do indoor workers.
Another problem that the researchers have with sun exposure as a vitamin D source is this: People who live at high latitudes do not produce any vitamin D from sun exposure in the winter, because there is no UVB light at that time of year. My response to this is the following: Use UVB lamps or sunbeds. Such a suggestion would probably cause the authors of this researchers to melt down. I can hear them screaming “melanoma!” already. I would then direct them to a 20-year study from Sweden, which showed that women who used sunbeds during that 20 years had a 23% reduction in all-cause death risk compared to those who avoided sunbeds. And, they were not at increased risk of melanoma. Also, the subjects in the study who avoided sun exposure were twice as likely to die of any cause compared to those who had the highest sun exposure.
At almost any place on earth, we now have either the sunshine or UVB lamps that can give us the vitamin D we need and the other photoproducts that protect us from myriad diseases, including various infections. It is a shame that too many fail to take advantage.
 Juliana de Castro Kroner, Andrea Sommer and Mario Fabri. Vitamin D Every Day to Keep the Infection Away? Nutrients 2015, 7, 4170-4188.
 Godar D, Landry, R, Lucas, A. Increased UVA exposures and decreased cutaneous Vitamin D3 levels may be responsible for the increasing incidence of melanoma. Med Hypotheses 2009;72(4):434-43.
 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.
BDNF is a factor in nerve growth and maturation, and is essential in synapse formation and plasticity. A lack of of it is implicated in psychiatric disorders such as schizophrenia, intellectual disability, autism and depression. Interestingly, it has been shown that unless there is sufficient BDNF in the brain, conventional antidepressants do not work very well, and when BDNF is infused directly into the brains of rodents, it produces an antidepressant effect.
It has also been shown that BDNF has a seasonal variation in concentration correlating with the amount of ambient sun; it increases in the spring and summer and decreases in fall and winter.  The authors of this research described the importance of their findings thusly: “This finding is important for our understanding of those factors regulating BDNF expression and may provide novel avenues to understand seasonal dependent changes in behavior and illness such as depression.”
BDNF has been shown to increase significantly after bright light exposure, and in what we would consider to be a remarkably important study, both light exposure and treadmill exercise increased its expression of
in rats, or as the researchers showed, exercise and/or bright light promoted neurogenesis (new nerve cell growth) in the adult rat brain. How important is this finding for adults who are worried about cognitive decline? We are actually seeing an example of new brain cells being built by bright light and exercise. What a wonderful way to help prevent Alzheimer’s disease and maintain mental sharpness into old age! Don’t forget your (safe) sunlight!
 Björkholma C, Monteggiab, L. BDNF — a key transducer of antidepressant effects. Neuropharmacology. 2016 March ; 102: 72–79.
 Siuciak JA, Lewis DR, Wiegand SJ, Lindsay RM. Antidepressant-like effect of brain-derived neurotrophic factor (BDNF). Pharmacol. Biochem. Behav. 1997; 56(1):131–137.
 Molendijk ML, Haffmans JP, Bus BA, Spinhoven P, Penninx BW, Prickaerts J, Oude Voshaar RC, Elzinga BM. Serum BDNF concentrations show strong seasonal variation and correlations with the amount of ambient sun. PLoS One. 2012;7(11):e48046.
 Tirassa P1, Iannitelli A, Sornelli F, Cirulli F, Mazza M, Calza A, Alleva E, Branchi I, Aloe L, Bersani G, Pacitti F. Daily serum and salivary BDNF levels correlate with morning-evening personality type in women and are affected by light therapy. Riv Psichiatr. 2012 Nov-Dec;47(6):527-34.
 Kwon SJ, Park J, Park SY, Song KS, Jung ST, Jung SB, Park IR, Choi WS, Kwon SO. Low-intensity treadmill exercise and/or bright light promote neurogenesis in adult rat brain. Neural Regen Res. 2013 Apr 5;8(10):922-9.
I have written several blogs making this melanoma case: not only is this deadly cancer not caused by sun exposure, but habitual, or regular, sun exposure has a protective effect against the disease. This blog will serve to reinforce and review the reasoning behind those conclusions.
A friend sent me a scientific paper that I had forgotten or missed—a paper by Dr. Veronique Bataille that brought out several supportive points about how sun exposure protects against the disease. Here are a few of the salient ideas from the paper:
- The increase in melanoma is mostly seen for the thin types, which can’t be attributed to sun exposure but to increasing screening over the last 20 years. The fact is, that incidence appears to increase as the number of dermatologists and public health campaigns also increase. But the increase in melanoma is not real. This idea is perfectly plausible; when more dermatologists are available, and the public is driven to them by health campaigns more melanomas are found. Many “first-stage” or thin “thin” melanomas are discovered and counted that would not have been found in previous decades. This causes numbers to be highly inflated compared to the days when there were fewer dermatologists and fewer public health campaigns.
Comment: Another fact was not mentioned in the paper: Stunningly, a worldwide study of melanoma diagnosis and accuracy, published in the American Academy of Dermatology (AAD) showed that most diagnoses were incorrect. Approximately 44 different authors from many different clinics and countries, including the US, contributed to the report. They made an accuracy-in-detection analysis based on the actual number of melanomas that were excised during a period of ten years, compared with the number that really needed to be excised. Many clinics in different countries were involved in assessing the numbers. The AAD research showed that only about 3.5% of diagnoses in non-specialized clinics, and 14.7% in specialized clinics, resulted in actually being melanoma. From this information, it is evident that many melanoma surgeries are bogus and may inflate the incidence of this deadly skin cacner.
What do we take away from this? There may be no real increase in melanoma, only an increase in assessment and excision.
- Low vitamin D levels are common in melanoma patients and have a deleterious effect on their risk and survival.
Comment: Low vitamin D levels are caused by sunlight deprivation; we are told to avoid the sun, but sun avoidance leads to vitamin D deficiency, which further leads to melanoma. If our population regularly enjoyed non-burning sun exposure, vitamin D levels would be much higher and the risk of melanoma much lower. This is corroborated by the fact that people who habitually work outdoors have a far lower risk of the disease. Dr. Cedric Garland and his colleagues showed that those who worked indoors had a 50% greater risk of than those who worked both indoors and outdoors.
- An excess of naevi (moles), not sun exposure, is the strongest risk factor for melanoma, and when comparing the risk created by sunburns and fair skin to the risk created by an excess of moles, the moles create a 15-30 times higher risk.
Comment: Some very important research by Dr. Adele Green found that the strongest risk factor for both limb melanoma and trunk melanoma was the presence of more than 10 moles on the arm, which predicted a 42-times increased risk.  This means that public health campaigns should promote mole awareness! Unfortunately, they promote sun avoidance, which increases the risk of melanoma.
- Attempts to decrease melanoma incidence and mortality, by reducing sun exposure, has not been proven to work and may be harmful.
Comment: the statement is obviously true. In the U.S., Sun exposure has decreased by about 90% since 1935. During that same period, melanoma has increased by 3,000%. Data from the Bureau of Labor statistics showed that indoor occupations such as “professional, managerial, clerical, sales, and service workers (except private household service workers) grew from one-quarter to three-quarters of total employment between 1910 and 2000.” The BLS also stated, during the same period, the outdoor occupation of farming declined by 96% from 33% to 1.2% of total employment. The data also show approximately 66% of the decline in the occupation of farmers and 50% of the decline in the occupation of farm laborers occurred after 1935.
Further information, this time from the Environmental Protection Agency (EPA) determined as of 1986, about 5 percent of adult men worked mostly outside, and about 10 percent worked outside part of the time. The proportion of women who worked outside was thought to be even lower. These data demonstrate a dramatic shift from outdoor, sun-exposed activity to indoor, non-sun-exposed activity during the mid-to-late 20th Century. This change, nonetheless, has been accompanied by a 30-times increase in risk since 1935, the MIF-baseline year.
- Photoageing, which is skin ageing due to sunlight exposure, is not greater in melanoma patients than patients who do not have the disease. In fact, patients with the cancer exhibit less photoageing than those who do not have the disease.
Comment: This was a new research for me and it belied the idea that sun exposure caused melanoma. If sun exposure causes skin photoageing, and there is less photoageing on cancer sites, sun exposure cannot possibly be causing melanoma. Enough said.
We need our sunshine, and one of the reasons for that need is to prevent deadly cancers.
 Bataille V. Melanoma. Shall we move away from the sun and focus more on embryogenesis, body weight and longevity? Medical Hypotheses 81 (2013) 846–850.
 Argenziano G, Cerroni L, Zalaudek I, Staibano S, Hofmann-Wellenhof R, et al. Accuracy in melanoma detection: a 10-year multicenter survey.J Am Acad Dermatol. 2012 Jul;67(1):54-9.
 Garland FC, White MR, Garland CF, Shaw E, Gorham ED. Occupational sunlight exposure and melanoma in the U.S. Navy. Arch Environ Health. 1990 Sep-Oct;45(5):261-7.
 Green AC, Siskind V. Risk factors for limb melanomas compared with trunk melanomas in Queensland. Melanoma Res. 2012 Feb;22(1):86-91.
 Melanoma International Foundation, 2007 Facts about melanoma. Sources: National Cancer Institute 2007 SEER Database, American Cancer Society’s 2007 Facts and Figures, The Skin Cancer Foundation, The American Academy of Dermatology.
 US Congress, Office of Technology Assessment, Catching Our Breath: Next Steps for Reducing Urban Ozone, OTA-O-412 (Washington, DC: US Government Printing Office, July 1989).
Leprosy is a bacterial disease that has been historically mentioned as a scourge, when it was considered to be incurable and disfiguring. Symptoms that develop include granulomas (inflammation caused by a collection of immune cells) of the nerves, respiratory tract, skin, and eyes. This may result in a lack of ability to feel pain, followed by the loss of parts of extremities, due to repeated injuries or infection of unnoticed wounds. About 180,000 people worldwide are diagnosed with leprosy yearly, and about 100 people are diagnosed in the U.S. each year. Leprosy has been considered to be a disease which has been eradicated, but such is not the case. For example, an article in an Indian paper shows it is much more prevalent in highly urbanized areas (areas of less sun) than in rural or less polluted areas (areas of more sun). Also, when the bacteria that cause leprosy are exposed to ultraviolet light, the procedure kills half of the bacteria. Therefore, sunlight may fight leprosy as it fights other bacteria, by stopping them at the source. Sun is a potent bactericide. Dr. Kime, in his book, Sunlight Could Save Your Life, reviewed the results of research conducted between 1886 and 1909. It showed the following bacteria were killed by ultraviolet light: anthrax, plague, streptococci, tubercle bacillus, cholera, staphylococcus, colon bacillus and dysentery bacillus. Sun was virtually forgotten with the advent of antibiotic drugs, but now the interest has returned. While watching a newscast, I noticed the news ticker announcing, “Sunshine is the most effective anti-infection therapy.” I believe that is true; sun exposure is provided to the earth to help prevent myriad diseases, but many of us try to avoid its healing powers. Non-burning sun exposure is a magnificent healer, and also a preventer of disease in those cases where it cleans the environment of noxious microorganisms.
 Kumar, R. Urbanites More Prone to Leprosy. Merinews April 14, 2008. (available at http://www.merinews.com/catFull.jsp?articleID=132447)
 Truman RW, Gillis TP. The effect of ultraviolet light radiation on Mycobacterium leprae. Int J Lepr Other Mycobact Dis. 2000 Mar;68(1):11-7.
Ovarian cancer, like most cancers, is nothing to trifle with. There are 22,280 new cases of ovarian cancer and 14,240 deaths annually in the U.S. Compare that death statistic to melanoma, which has a death rate of only 9,730. (And I might mention that people who are regularly in the sun have a reduced risk of melanoma.) But are there any indications that ovarian cancer is reduced by sun exposure? Yes. The National Cancer Institute’s Cancer Mortality Map also shows that ovarian cancers are much less common in sunnier Southern and Southwestern States than in the North and Northeast, indicating a protective effect of sun exposure.
Research has also demonstrated a relationship between high sun exposure and low risk of ovarian cancer. For example, an Australian investigation showed that women in the highest third of sun exposure, over a lifetime, had a 30% reduced risk of all endothelial ovarian cancers, a 53% reduced risk of borderline tumors and 22% reduced risk of invasive tumors. And, in one piece of research using the Nurses’ Health Study ll, sun exposure was associated with a 33% reduced risk of ovarian cancer. Ovarian cancer mortality rates were also found to be strongly inversely correlated with solar UVB doses in an ecological study by Drs. William Grant and Cedrick Garland.
Sun avoidance is one of the most deadly practices ever perpetrated on the public. Women, carefully embrace the sun and reduce your risk of this potentially deadly disease.
 Siegel RL, Miller KD, Jemal A. Cancer statistics, 2016. CA Cancer J Clin. 2016 Jan;66(1):7-30.
 American Cancer society statistics, 2017.
 Grant, W B. Information available at SUNARC.org, and at the National Cancer Institute’s Cancer Mortality Maps and Graphs.
 Tran B, Jordan SJ, Lucas R, Webb PM, Neale R; Australian Ovarian Cancer Study Group. Association between ambient ultraviolet radiation and risk of epithelial ovarian cancer. Cancer Prev Res (Phila). 2012 Nov;5(11):1330-6.
 Prescott J, Bertrand K, Poole E, Rosner B, Tworoger S. Surrogates of Long-Term Vitamin D Exposure and Ovarian Cancer Risk in Two Prospective Cohort Studies. Cancers 2013, 5, 1577-1600;
 Grant WB, Garland CF. The association of solar ultraviolet B (UVB) with reducing risk of cancer: multifactorial ecologic analysis of geographic variation in age-adjusted cancer mortality rates. Anticancer Res. 2006 Jul-Aug;26(4A):2687-99.
Hypertension, or chronic high blood pressure, is determined by the amount of blood the heart pumps and the amount of resistance to blood flow in the arteries. The more blood the heart pumps and the tighter the arteries, the higher the blood pressure. The top number on a blood-pressure measurement, stated in millimeters of mercury (mm/Hg), is called systolic pressure, and the lower number is called diastolic pressure. Hypertension is defined as having a blood pressure > 140/90 mm/Hg. Thirty-one percent of US adults are hypertensive. Hypertension can damage arterial walls and can eventually lead to an increased risk of death from heart disease, heart failure, and other arterial diseases. It is also associated to a higher risk of kidney disease, irregular heart rhythms, osteoporosis, cognitive dysfunction, painful intercourse and stroke. Conventional textbook theory holds that blood pressure is regulated by the brain, blood vessels, or kidney, but recent evidence suggests it could be regulated in the skin, and sun exposure plays a role in controlling hypertension.
One of the earlier studies of hypertension and sun showed hypertension increased linearly at increasing distances from the equator. One study of hypertensive subjects shows that blood pressure levels average 165/90 in winter but 134/74 in the summer, and both stroke and heart attack rates double in the winter. Even in children, blood pressure is higher in winter than summer. This, of course, is indicative of a protective role of sun exposure on hypertension.
UVB light treatments with sun lamps have also been shown to substantially lower blood pressure in 24 hours, and over six weeks to raise serum 25(OH)D levels of vitamin D by 162%, while lowering both systolic and diastolic pressure by six points.
However, it is important to again mention that there is another important player in the relationship between hypertension and sun. Ultraviolet A (UVA) light (part of sunlight) stimulation of the skin causes the release of nitric oxide (NO) from pre-formed stores of NO in the skin. NO is a potent vasodilator, and when released into the arteries by UVA stimulation, causes increased blood flow and lowered blood pressure., 
Safe sun exposure, along with plenty of vegetable and fruit consumption, may enable you to say goodbye to blood-pressure problems.
 Mayo Clinic Diseases and Conditions: High blood pressure (hypertension). http://www.mayoclinic.org/diseases-conditions/high-blood-pressure/basics/definition/con-20019580 (accessed January 5, 2016).
 Fields LE, Burt VL, Cutler JA, Hughes J, RoccellaEJ, Sorlie P. The burden of adult hypertension in the United States 1999–2000: a rising tide. Hypertension. 2004;44:398–404.
 Ann Pietrangelo. Healthline 2014 http://www.healthline.com/health/high-blood-pressure-hypertension/effect-on-body (accessed January 4, 2016).
 Johnson RS, Titze J, Weller R. Cutaneous control of blood pressure. Curr Opin Nephrol Hypertens. 2016;Jan25(1):11-5.
 Rostand SG. Ultraviolet light may contribute to geographic and racial blood pressure differences. Hypertension. 1997 Aug;30(2 Pt 1):150-6.
 Charach G, Rabinovich PD, Weintraub M. Seasonal changes in blood pressure and frequency of related complications in elderly Israeli patients with essential hypertension. Gerontology. 2004 Sep-Oct;50(5):315-21
 Polat M, Akil I, Yuksel H, Coskun S, Yilmaz D, Erguder I, Onag A. The Effect of seasonal changes on blood pressure and urine specific gravity in children living in Mediterranean climate. Med Sci Monit2006;12:CR186-90.
 Krae R, Bühring M, Hopfenmüller W, Holick MF, Sharma AM. Ultraviolet B and blood pressure. Lancet 1998;352:709-10.
 Liu D, Fernandez BO, Hamilton A, Lang NN, Gallagher JM, Newby DE, Feelisch M, Weller RB. UVA irradiation of human skin vasodilates arterial vasculature and lowers blood pressure independently of nitric oxide synthase. J Invest Dermatol. 2014 Jul;134(7):1839-46.
 D Liu, BO Fernandez, NN Lang, JM Gallagher, DE Newby, M Feelisch and RB Weller. UVA lowers blood pressure and vasodilates the systemic arterial vasculature by mobilization of cutaneous nitric oxide stores. Photobiology Abstract # 1247 May 2013.
A new study, from the European Journal of Medicinal Chemistry, reports that synthesized chemicals that mimic those found occurring naturally in broccoli, cauliflower and other cruciferous vegetables, have the ability to inhibit melanoma. The synthesized chemicals, in fact, were able to inhibit the growth of melanoma cells by about 70% in an experiment on mice.
My last blog showed that tomato powder also had the ability to cut the risk of melanoma by 50% in another mouse experiment, and other studies have also shown that fruits and vegetables have important anti-cancer effects. So when we talk about the reasons that melanoma has increased so rapidly, despite the best efforts by the sunscreen industry and the anti-sun movement, we know many reasons that are backed by science: Lack of regular sun exposure, alcohol consumption, milk consumption and lack of fresh fruits and vegetables in the typical modern nutrition program.
Other investigations have studied the relationship between melanoma survival and fruit consumption. Melanoma patients who had their cancers removed—and who had a predicted death rate of 40% within 10 years—were assessed for consumption of fruit and red meat. Daily fruit consumption correlated to a reduced risk of death of 46%. Those who ate red meat at least once weekly showed an increased risk of death of 84%.
Eat your vegetable and fruits, eschew the meat and most other animal products, obtain regular, non-burning sun exposure, forget the alcohol and milk products and enjoy many outdoor activitiesin natural surroundings. Many of these factors will be discussed in my forthcoming book, Embrace the Sun.
Enjoy the outdoors!
 Deepkamal N. Kareliaa, Ugir Hussain, Parvesh Singh, A.S. Prakasha Gowdad, Manoj K. Pandey. Srinivasa R, Ramisettia. Shantu Amin, Arun K. Sharma. Design, synthesis, and identification of a novel napthalamide-isoselenocyanate compound NISC-6 as a dual Topoisomerase-IIα and Akt pathway inhibitor, and evaluation of its anti-melanoma activity. European Journal of Medicinal Chemistry 135;28:282-295.
 Gould Rothberg BE, Bulloch KJ, Fine JA, Barnhill RL, Berwick M5. Red meat and fruit intake is prognostic among patients with localized cutaneous melanomas more than 1 mm thick. Cancer Epidemiol. 2014 Oct;38(5):599-607.
In an impressive mouse study, it was shown that in animals that were exposed to high doses of radiation during a 35-week program, those that were fed a pre-radiation dose of tomato powder or tangerine powder had a higher level of the antioxidant lycopene than mice who were not fed the powders (control group). Lycopene is a potent antioxidant found in tomatoes, tangerines, watermelon and other fruits and vegetables.
Interestingly, the animals that consumed the tangerine powder had higher levels of lycopene than those consuming the tomato powder, but the results were not as impressive. The number of cancerous tumors that developed in the tomato-fed mice was about half the number that developed in the control group. Tomatoes obviously have anti-skin cancer attributes, but remember that lycopene may not be as effective as the whole tomato powder in reducing that disease. Whole foods are nearly always superior to the nutrients extracted from them, as all of the nutrients work in concert to help health whether for mice or men. There may be hundreds of nutrients besides lycopene in tomatoes, all having a positive effect in protecting against cancer. Why just take one nutrient from the tomato and put it in a pill? I’ll tell you why: It is a way to make money. In this case, the researchers discovered that important substances called glycoalkaloids were significantly higher in the skin after the ingestion of tomato powder, and seem to believe that these substances were responsible for the reduced risk of skin cancer.
It has actually been known for some time that some of the best skin protectants are tomatoes. One investigation showed that among individuals who consumed forty grams of tomato paste daily for ten weeks, sunburn-resistance time increased by 40%, and other research demonstrated that eating different tomato-based products correlated to significantly reduced risk of sunburn after exposure to ultraviolet radiation from sunlamps. It is also known that individuals with the lowest intake of alpha-carotene, beta-carotene, cryptoxanthin, lutein, and lycopene (all carotenoid antioxidants found in such vegetables such as carrots and tomato) had a 50% increased risk for melanoma.
There are few foods that taste better than a ripe, field-grown tomato. Eat your fill and enjoy some regular, non-burning sun.
 Cooperstone JL, Tober KL, Riedl KM, Teegarden MD, Cichon MJ, Francis DM, Schwartz SJ, Oberyszyn TM. Tomatoes protect against development of UV-induced keratinocyte carcinoma via metabolomic alterations. Sci Rep. 2017 Jul 11;7(1):5106.
 Stahl W, Heinrich U, Wiseman S, Eichler O, Sies H, Tronnier H. Dietary Tomato Paste Protects against Ultraviolet Light–Induced Erythema in Humans. J Nutr 2001;131:1449-51.
 Aust O, Stahl W, Sies H, Tronnier H, Heinrich U. Supplementation with tomato-based products increases lycopene, phytofluene, and phytoene levels in human serum and protects against UV-light-induced erythema. Int J Vitam Nutr Res 2005;75:54-60.
 Millen AE, Tucker MA, Hartge P, Halpern A, Elder DE, Guerry D 4th, Holly EA, Sagebiel RW, Potischman N. Diet and melanoma in a case-control study. Cancer Epidemiol Biomarkers Prev 2004;13:1042-51
 Afaq F, Katiyar SK. Polyphenols: skin photoprotection and inhibition of photocarcinogenesis.Mini Rev Med Chem. 2011 Dec;11(14):1200-15.
 Afaq F, Katiyar SK. Skin photoprotection by natural polyphenols: Anti-inflammatory, anti-oxidant and DNA repair mechanisms. Arch Dermatol Res 2010;302:71.
 Stahl W, Heinrich U, Wiseman S, Eichler O, Sies H, Tronnier H. Dietary Tomato Paste Protects against Ultraviolet Light–Induced Erythema in Humans. J Nutr 2001;131:1449-51.
 Meyskens FL Jr, Farmer PJ, Anton-Culver H. Diet and melanoma in a case-control study. Cancer Epidemiol Biomarkers Prev 2004;13:1042-51.
Sun exposure leads to an increase in bone mass and a decrease in falls. It is generally assumed that since sun exposure also leads to an increase in blood-vitamin D levels, those levels are responsible for those positive effects of the sun. However, in the July issue of Osteoporosis International, there are indications that sun exposure may have some bone-building and bone-protecting effects of its own. The researchers used microtopographical skin changes to quantify cumulative lifetime sun exposure. This method is known as the Beagley-Gibson (BG) method of measuring cumulative sun exposure. After this measurement, they compared lifetime sun exposure to bone-mineral density, risk of falls and risk of fractures in older adults, aged 53-83 years. Vitamin D levels were also assessed in all subjects.
In women, an increasing BG grade (increasing sun exposure) was quite protective; their risk for vertebral fractures was reduced by 66%, and all major fractures were reduced by 25%. For men, bone-mineral density was increased in younger males who showed the most sun exposure. These results were independent of current vitamin D levels. Risk of falls were not changed. We know that being exposed to the sun is very closely associated with better bone strength and have assumed that most of that bone strength is due to higher vitamin D. In this investigation, vitamin D levels had no predictive value. However, there may have been be other factors at play.
What, besides vitamin D, could be responsible for the reduction in fractures? One possibility is this: Outdoor living is necessary for sun exposure, and people who enjoy the outdoors are generally more physically active. It is well-known that exercise builds bone mass and/or strength due to the stress on the bones. That probably happens with any reasonable level of vitamin D.
I opine, that a study conducted in Spain, is perhaps the transcendent research on hip fracture and sun exposure: it showed that women who were sun seekers had only about one-eleventh the risk of hip fracture compared to those who stayed indoors. So, it may be, that to protect our bones, lots of sun exposure, rather than just a little, may be best. Just be sure not to burn. Daily exercise is also imperative. And be sure to eat a healthful, anti-inflammatory diet, which guards against both osteoporosis and skin cancer. Happy sunning.
 Thompson MJW, Aitken DA, Otahal P, Cicolini J, Winzenberg TM, Jones G. The relationship between cumulative lifetime ultraviolet radiation exposure, bone mineral density, falls risk and fractures in older adults. Osteoporos Int. 2017 Jul;28(7):2061-2068.
 Larrosa M, Casado E, Gómez A, Moreno M, Berlanga E, Ramón J, Gratacós J. Vitamin D deficiency and related factors in patients with osteoporotic hip fracture. Med Clin (BARC) 2008;130:6-9.