Health
Studies suggest that sunlight can induce hormones that make men hungry | Biology
Summer sunshine can make us feel hot, sweaty, and a little burnt, but it can also make men hungry by causing the release of appetite-boosting hormones from the fat stores in the skin. I have.
Studies published in the journal Natural metabolismThere is increasing evidence that the effects of exposure to sunlight can be more complex than initially thought.
Overexposure is well known to increase the risk of skin cancer, but recent studies have shown that moderate exposure may extend life expectancy as it helps protect against cardiovascular disease and other causes of death. It is suggested that there is.One possibility is that it lowers blood pressure through its release Nitric oxide from the skin, The process of relaxing blood vessels. Other scientists attribute the health benefits of sunlight to the production of vitamin D.
Carmit Levy, a professor of human molecular genetics and biochemistry at Tel Aviv University, and his colleagues wondered if food consumption could provide some clues and 3,000 participants enrolled in the National Nutrition Survey. Analyzed the data from. Researchers have found that men, not women, increased their food intake during the summer. The effect wasn’t that great – it’s the same as eating an extra 300 calories a day – but over time, this may be enough to cause weight gain.
To further investigate, they exposed male and female volunteers to 25 minutes of noon sunlight on sunny days, which caused increased levels of ghrelin, an appetite-promoting hormone in male blood, but females. I found that it was not caused by the blood of.
Similarly, experiments with mice have shown that when men are exposed to UVB light, they eat more, are more motivated to look for food, and have higher levels of ghrelin in their blood. No such changes were seen in female mice.
The trigger for ghrelin release appeared to be DNA damage in skin cells. Estrogen blocked this effect, which may be the reason why sunlight did not affect women as well.
Levy explained that ghrelin, sometimes called the “hunger hormone,” had other effects on the body in addition to appetite regulation. It also reduces inflammation and myocardial waste and reduces arteries. [blood] pressure. “Ghrelin may be a mechanical link between exposure to sunlight and alleviation of cardiovascular disease,” she said.
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Carlos Diegoes and Rubenno Geilas, professors at the University of Santiago de Compostela in Spain, who were not involved in the study, described the results as “exciting” and assessed the effects of age and ethnicity associated with UVB exposure and food. Added future research Intake is “long-awaited”. “This study will surely pave the way for further research on the role of skin in energy and metabolic homeostasis. [balance]It’s an area that has been largely overlooked, “they write in the accompanying news and views of Nature Metabolism.
Dr. Duane Mellor, a nutritionist and senior education fellow at Aston University, was also not involved, but was more cautious. “It shows a potential mechanism of how UVB affects hormone metabolism, and at least how this is associated with an increase in the mouse appetite hormone ghrelin,” he said. Told.
“It is important to recognize that this paper does not claim that exposure to sunlight and UVB leads to weight gain in human males. Instead, grelin has an anti-inflammatory effect, so it is moderate. Provides interesting insights into how UVB exposure is associated with reduced cardiovascular risk and health benefits such as inflammation. “
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Sources 2/ https://www.theguardian.com/science/2022/jul/11/sunlight-may-trigger-hormone-that-makes-men-hungrier-study-suggests The mention sources can contact us to remove/changing this article |
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