Jet lag may be a gut feeling
After a week-long vacation halfway around the world, it’s time to go back to your usual routine and time zone. But don’t forget about that free souvenir, jet lag. A disrupted circadian rhythm can be a real bummer, but researchers may have found the fix in your belly.
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In a study funded by the U.S. Navy, researchers at the University of Colorado, Boulder, looked into how the presence of a prebiotic in one’s diet can have on the disrupted biological clocks. They’re not the same as probiotics, which help you stay regular in another way. Prebiotics work as food to help the good gut bacteria you already have. An earlier study had suggested that prebiotics may have a positive effect on the brain.
To test the theory, the researchers gave one group of rats their regular food while another group received food with two different prebiotics. After manipulating the rats’ light-dark cycle for 8 weeks to give the illusion of traveling to a time zone 12 hours ahead every week, they found that the rats who ate the prebiotics were able to bounce back faster.
The possibility of ingesting something to keep your body clock regular sounds like a dream, but the researchers don’t really advise you to snatch all the supplements you can at your local pharmacy just yet.
“If you know you are going to come into a challenge, you could take a look at some of the prebiotics that are available. Just realize that they are not customized yet, so it might work for you but it won’t work for your neighbor,” said senior author Monika Fleshner.
Until there’s more conclusive research, just be good to your bacteria.
How to make stuff up and influence people
You’ve probably heard that we use only 10% of our brain. It’s right up there with “the Earth is flat” and “an apple a day keeps the doctor away.”
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The idea that we use only 10% of our brains can probably be traced back to the early 1900s, suggests Discover magazine, when psychologist William James wrote, “Compared with what we ought to be, we are only half awake. Our fires are damped, our drafts are checked. We are making use of only a small part of our possible mental and physical resources.”
There are many different takes on it, but it is indeed a myth that we use only 10% of our brains. Dale Carnegie, the public speaking teacher, seems to be the one who put the specific number of 10% on James’ idea in his 1936 book, “How to Win Friends and Influence People.”
“We think that people are excited by this pseudo fact because it’s very optimistic,” neuroscientist Sandra Aamodt told Discover. “Wouldn’t we all love to think our brains had some giant pool of untapped potential that we’re not using?”
The reality is, we do use our whole brain. Functional MRI shows that different parts of the brain are used for different things such as language and memories. “Not all at the same time, of course. But every part of the brain has a job to do,” the Discover article explained.
There are many things we don’t know about how the brain works, but at least you know you use more than 10%. After all, a brain just told you so.