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AT morning pee contains a surprising amount of information. A light yellow is probably a good sign, while a darker yellow may tell a tale of dehydration. For those who tend to be on the darker end of the spectrum, new research suggests that the problem can not be ignored. According to a paper published Monday in the newspaper Sleep, it might also be something to do.
"Asher Rosinger, Ph.D., Assistant Professor of Biobehavioral Health and Anthropology at Penn State, says Asher Rosinger, Ph.D. This paper is designed to be used in many countries, but it is analyzed in the first half of the year, which analyzed 26,000 subjects in the US and China. have some markers of dehydration lingering in their urine samples.
Rosinger tells reverse that he believes sleep-dependent dehydration comes down to the release of an important hormone, called vasopressin.
"[Vasopressin] increases towards the late sleep period as a way to conserve body water. It does not help to avoid dehydration, "he says. "So we have been in the literature, we started thinking that, they are not getting enough sleep, they can not help but feel good about their body water homeostasis."
Typically when the brain's pituitary gland is given that it is running low, it can release vasopressin, which allows the water that usually resides in urine to actually be pulled back into the body. Some research, however – for example, a study on night shift workers – suggests that the body is bound to certain patterns of vasopressin release.
Rosinger's study did not actually measure vasopressin levels, but it was able to approximate dehydration by examining biomarkers as urine gravity and osmolarity (from 26,142 subjects in the United States and China). He and his co-authors then compared these numbers to subjects' reported sleep time. Here they noticed a pattern: People who slept for a very fast pee (dehydration) compared to those who slept for eight hours.
This may be slightly confusing. Because vasopressin helps the body pulling water back from urine to dehydration – so concentrating pee – you might expect that you can concentrate the body is actually releasing vasopressin in these sleep-deprived people. This is why Rosinger makes it clear that he is in danger of losing sleep. vulnerable to dehydration over time with their natural vasopressin rhythm. In a sense, by waking up early, we're throwing a wrench in a natural cycle that could have consequences even during waking hours.
His pattern does this with some power – given the numbers behind his study. He also found that people who slept for a time not to have these same issues with dehydration.
"We were able to replicate this two of the world's largest cultures in the US and China," Rosinger says. "To be able to see the same results in both US adults and Chinese adults, really strengthens these findings."
But still, it's too early to assume a causal relationship, which is why he's doing an additional study on this now. It's possible, Rosinger says, that simply being dehydrated might lead someone to sleep less over time. In follow-up work, he will experimentally restrict how much sleep is caused by dehydration.
The most likely answer, at least, is that it is probably a bit of both: creating a cycle of sleep loss and dehydration that feed into another.
"This could actually be something that's quite cyclical," he says. "It could be that they are affected by their hydration status, and if that person is dehydrated it could affect their sleep as well. It could be interesting to explore. "
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