The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
However, the data using UVB on the skin of men and women in order to increase hormone, in particular testosterone and estrogen output, those data, I think, are very exciting and very actionable when we talked about those earlier.
Every Sunday: the week’s new conflicts and verdict changes — and nothing else.
Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
If they received enough exposure of that light to their skin, there were increases in testosterone that were observed within a very brief period of time, also increases in the hormone estrogen.
They saw significant increases in the hormones, beta-estradiol, which is one of the major forms of estrogen, progesterone, another important steroid hormone, and testosterone in both men and women.
Skin Exposure to UVB light induces a skin, brain, gonad axis, and sexual behavior.
As I'm about to tell you, in animals such as mice, but also in humans, exposure to light, in particular UV blue light, so short wavelengths of light, can trigger increases in testosterone and estrogen and the desire to mate.
There were also increases in gonadal weight, literally increases in testy size and in ovarian size when mice were exposed to this UVB light past a certain threshold.
The basic finding of this study was that when mice or humans were exposed to UVB, meaning ultraviolet blue light, so short wavelength light of the sort that comes through in sunshine, but is also available through various artificial sources. If they received enough exposure of that light to their skin, there were increases in testosterone that were observed within a very brief period of time. also increases in the hormone estrogen. And I should point out that the proper ratios of estrogen and testosterone were maintained in both males and females, at least as far as these data indicate. And mice tended to seek out mating more and mate more. There were also increases in gonatal weight, literally increases in testes size and in ovarian size when mice were exposed to this UVB light past a certain threshold.
If they received enough exposure of that light to their skin, there were increases in testosterone that were observed within a very brief period of time. also increases in the hormone estrogen. And I should point out that the proper ratios of estrogen and testosterone were maintained in both males and females, at least as far as these data indicate. And mice tended to seek out mating more and mate more. There were also increases in gonatal weight, literally increases in testes size and in ovarian size when mice were exposed to this UVB light past a certain threshold.
there is some good evidence that sun exposure is associated with positive increases in the gonadal axis so skin exposure to uvb light increase induces a skin brain gonad access and sexual behavior
I think it's pretty clear that ultraviolet light is good for testosterone