Mauritio
Member
- Joined
- Feb 26, 2018
- Messages
- 4,716
I recenty listened to an Andrew Huberman podcast, where he mentioned sunlight exposure (especially in the morning) as beeing very good for your hormonal state.
I found this study in his podcast notes.
They irradiated mice with UVB light, that was equivalent to about 20-25 minutes of midday sun.
They found that acute exposure wasnt effective at raising hormones, although I doubt that as there's human studies showing the opposite (Light exposure increases androsterone by 200% in males)
But chronic exposure over 8 weeks significantly increases the progesterone receptor expression in the ovaries of female mice by about 4,5 fold.
It also increased estrogen and androgen receptors,although a lot less.
The problem I have is that they didn't mention anywhere in the study how big the PR increase actually was. By reading the study you'd get the impression that the ER increase was bigger.
They always talk about "the Estrus days" beeing increased or the estrogen receptor ,but that increase was a lot less pronounced than the PR increase.
Only by looking at the chart, it becomes clear how big the PR increase actually was.
They also showed that the Testosterone level of male mice was increased by about 35-40% after chronic UVB-Exposure.
The authors also have a few more interesting discoveries concerning UVB-Exposure (partially in humans!):
-Increases levels of GnRH, FSH and LH in female mice
- Increases attractiveness in female mice
-Increases feelings of "passionate love" in humans(!) for each other
I found this study in his podcast notes.
They irradiated mice with UVB light, that was equivalent to about 20-25 minutes of midday sun.
They found that acute exposure wasnt effective at raising hormones, although I doubt that as there's human studies showing the opposite (Light exposure increases androsterone by 200% in males)
But chronic exposure over 8 weeks significantly increases the progesterone receptor expression in the ovaries of female mice by about 4,5 fold.
It also increased estrogen and androgen receptors,although a lot less.
The problem I have is that they didn't mention anywhere in the study how big the PR increase actually was. By reading the study you'd get the impression that the ER increase was bigger.
They always talk about "the Estrus days" beeing increased or the estrogen receptor ,but that increase was a lot less pronounced than the PR increase.
Only by looking at the chart, it becomes clear how big the PR increase actually was.
They also showed that the Testosterone level of male mice was increased by about 35-40% after chronic UVB-Exposure.
The authors also have a few more interesting discoveries concerning UVB-Exposure (partially in humans!):
-Increases levels of GnRH, FSH and LH in female mice
- Increases attractiveness in female mice
-Increases feelings of "passionate love" in humans(!) for each other
Skin exposure to UVB light induces a skin-brain-gonad axis and sexual behavior
Parikh et al. find that UVB exposure triggers a skin-brain-gonadal axis through skin p53 activation. UVB exposure increases in female mice sexual responsiveness and attractiveness, hypothalamus-pituitary-gonadal axis hormone levels, ovary size, and estrus duration, as well as male-female...
www.cell.com
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