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A study published in the journal Molecules found that six common artificial sweeteners approved by the Food and Drug Administration and ten sports supplements that contained them were toxic to the digestive microbes of mice.
The study was conducted by Ben Gurion University of the Negev in Israel and Nanyang Technological University in Singapore.
The artificial sweeteners on which university researchers focused were aspartame, sucralose, saccharin, neotame, advantame and acesulfame potassium-k.
They discovered that one milligram per milliliter of artificial sweeteners was exposed to mice, the bacteria found in the digestive system became toxic.
"This is further evidence that the consumption of artificial sweeteners negatively affects intestinal microbial activity, which can cause a wide range of health problems," said Ariel Kushmaro, a professor in the Department of Biotechnology Engineering. BGU.
The results discuss the fact that the intestinal microbial system "plays a key role in human metabolism" and that artificial sweeteners can "affect the health of the host, for example by inducing glucose intolerance".
However, the study also found that mice given neotame had different metabolic patterns than those who did not, and that several important genes found in the human gut had decreased.
Concentrations of several fatty acids, lipids and cholesterol were also found to be higher in the neotame-treated mice.
Bacteria in your gut have a big impact on your well-being, whether it's metabolism, the immune system or your mood.
Yogurt and probiotic supplements have been promoted as having health benefits in the past.
They are supposed to help restore the natural balance of bacteria in the gut when it is disrupted by disease or treatment.
But another recent study found that probiotics are only effective for some people and can be a waste of time and money for others.
In the latest study published in the journal Cell, a group of healthy volunteers underwent a measure of intestinal colonization.
They were fed probiotic strains and in half of the cases, the good bacteria entered the mouth and went straight to the other end.
In the other half of the cases, they lingered briefly before being ousted by existing microbes.
Professor Eran Elina, immunologist at the Weizmann Institute of Science in Israel and lead author of the study, said: "Surprisingly, we found that many healthy volunteers were actually resistant, in that probiotics could not not colonize their gastrointestinal tract.
"Instead, they could be tailored to the needs of each individual."
Professor Eran Segal, a computer scientist biologist, added, "This opens the door to diagnoses that would lead us to a universal empirical consumption of probiotics, which seems useless in many cases, to appropriate consumption at the same time. individual".
If you are thinking of trying probiotics, the NHS advises you to keep up to date with some problems.
"Probiotics are generally classified as foods rather than drugs, which means that they are not subject to rigorous drug testing.
"Because of the way probiotics are regulated, we can not always be sure that the product actually contains the bacteria mentioned on the label of the food, that it contains enough bacteria to have an effect or that bacteria can survive long enough to reach your instinct.
"There are many types of probiotics that can have different effects on the body, and little is known about the most suitable types.
"Do not assume that the beneficial effects observed with one type are the same as other similar types or will be repeated if they are used for other purposes.
"And there will probably be a huge difference between pharmaceutical-grade probiotics that look promising in clinical trials and yogurts and supplements sold in stores."
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