2024 Author: Jasmine Walkman | [email protected]. Last modified: 2023-12-16 08:29
Probiotics, which are contained in yogurt, improve people's mood because they affect the functioning of the brain, experts say. Past research has confirmed that these bacteria affect rodent brains, but so far it has not been confirmed that they affect humans.
The researchers found that people who consumed milk twice a day for a month had altered brain activity.
This change was observed in reactions to tasks that were related to emotional attention, by monitoring how the brain responds to emotions, as well as during brain rest.
Symbiotic intestinal bacteria are known to protect against a number of diseases, as they strengthen the immune system, facilitate the maintenance of normal blood pressure, aid digestion. These bacteria are actually a complex ecosystem of microorganisms that live in the human digestive system.
It is known that when stressed or some other emotion, the brain sends signals to the intestines, which can lead to gastrointestinal upset. Research proves that signals actually move in the opposite direction.
The study involved 36 women who were of normal weight and were between 18 and 53 years old. The study was conducted by experts from the University of California, Los Angeles, and the person responsible for the study was Dr. Kristen Tilish.
The women were divided into three groups of 12 people - in the first group the participants ate milk with probiotic strains such as Streptococcus thermophiles, Lactobacillus bulgaricus and Bifidobacterium animalis twice a day.
The second group consumed milk without live bacteria, and in the third group women did not eat dairy products at all. The women were examined before and after the study.
At each session, the specialists began the first five-minute brain scan at rest, while the ladies lay with their eyes closed. The women were then asked to perform a task that was actually related to their emotional attention.
In this task, the brain was scanned, and during this time the participants connected different faces on the computer screen, expressing anger and fear, with other people appearing.
The results show that the women in the first group had reduced activity in the part of the brain that is actually responsible for touch. The ladies in the group that ate non-probiotic milk, as well as the women in the third group, had no change in this part of the brain.
Scientists hope to soon be able to determine what are these signals from intestinal bacteria that lead to this change in brain activity.
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