A history of sunlight and its’ beneficial properties have been the subject of wide investigation throughout the ages. In 1903 the Noble Prize for Medicine went to a doctor (Niels Finsen) who studied heliotherapy, the art of healing with the sun.
Many ancient cultures routinely took advantage of this low cost and completely natural method to increase vitality and fend off disease. The Greek word “gymnasium” means a place for naked exercise or training. The strongest athletes and warriors were the ones who bared as much skin as possible to the sunlight. The Greek historian Herodotus noticed that the skulls of Egyptians (left on the battle field) were so thick they couldn’t be crushed even with large rocks. The Persians, on the other hand, had skulls (left on the battle field) that could be crushed by the hand of a weak man. The Persians’ traditional clothing covered all parts of the body, even the head. The Egyptians wore little cloth coverings throughout their lives and made it a habit to sunbath in order to increase strength and prevent disease.
A study of 500,000 troops in the Austrian Federal Army proved that women who got pregnant in the early summer months produced taller babies because the sun helps the fetus grow faster. The rate of growth of a human is the quickest in the first 3 months after conception and the first 3 months after delivery. A tradition among European society was for a June wedding in order that potential pregnancies receive the amazing healing and protective powers of sunlight. June and July conceptions would also insure the child had the benefit of being born when the winter was ending and the sun again began to shine. It was well known among even the most uneducated members of European society that sunlight helped maintain a good clean bacteria free environment. Babies born in the winter, without the benefits of summer sunlight, had a high chance of dying from infection. The Pharaoh Akhenaten in 1300 BC wrote on the side of his tomb that he encouraged all pregnancies to occur during mid summer in order that the unborn child receive full strength and benefit from the summer sun.
Architects of the ancient world (up to 100 year ago) were forced not only to have a background in engineering but in medicine as well because of a responsibility each architect had to the health of the buildings’ occupants. Hospitals were always designed in order for the sun to flood the interior of the building for as much time as nature would allow. City designers were forced to design street plans and restrict building heights in order to maximize sun exposure of the citizens. In 1956 a nurse of the Rochford Hospital in Essex England discovered that babies with jaundice (excess bilirubin) had their yellow skin turn white as the sunlight broke down the toxic compound. A full recovery was almost a certainty when the nurses brought each infected child into the sunlight.
Today we’re often told by people, who benefit greatly when we’re sick, that the sun is disease causing instead of disease curing. The more we take these people’s advice, the sicker the society becomes and the more job security we see these people institute for themselves. We’re told to use sunblock yet conventional sunblocks are disease initiators themselves. The great majority of conventional sunblocks contain cancer causing chemical ingredients plus most conventional sunblocks only block UVB and it’s UVA that increases cancer risk dramatically. Are we brave enough to see that the media push to demonize sunlight is part of a bigger push against nature in general because for the services of science to be cherished we need to think of nature as faulty, inept and dangerous. More on this subject in the next article.

“Why, then, didn’t the ancient plebeians toiling in the fields all drop dead from malignant skin tumors? Mostly because they dropped dead from a lot of other things first. So yes, cancer was actually very uncommon for the Egyptians, but not because solar UV is no big deal. Life expectancy for the pharaohs only reached 40 to 50 years, and they mostly stayed inside and got fanned with palm fronds. Laborers tended to live maybe 25 to 30 years, so while they likely did receive serious sun exposure, they generally didn’t get old enough for the melanoma to show up.”
https://www.straightdope.com/columns/read/3192/why-is-skin-cancer-more-prevalent-now-than-in-ancient-times/