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Research from the University of Toronto has identified a new benefit for probiotics: alleviating symptoms of anxiety associated with chronic fatigue syndrome (CFS).
The study, led by A. Venket Rao, found that when participants with CFS were given a probiotic for two months, they reported reduced levels of anxiety.
The stomach is home to a sensitive balance of microorganisms that includes good bacteria, or probiotics, which are found in supplements and certain foods, such as yogurt, miso, kefir and sauerkraut. Two of the most common probiotic cultures are Lactobacillus and Bifidobacteria. These healthy bacteria inhibit the growth of harmful microorganisms, such as yeasts, and stabilize the intestinal ecosystem, thereby improving nutrient absorption and preventing bloating, diarrhea and other stomach complaints. In addition to aiding digestive processes, probiotics also metabolize cholesterol, which reduces cholesterol levels in the blood.
People living with CFS experience a variety of symptoms, including persistent fatigue as well as sleep disturbances, anxiety and depression. They also often complain of gastrointestinal and digestive disorders, such as irritable bowel syndrome, which has prompted recent research into the connection between intestinal health and emotional issues.
During the study, 39 participants with CFS took either Lactobacillus casei or a placebo daily for two months. As a result, some 73 percent of the participants taking the probiotic experienced an increase in the presence of good intestinal bacteria, evident by improved digestive function, such as less bloating and gas and reduced inflammation. The digestive benefits also correlated with a significant decrease in anxiety.
The researchers theorize that probiotics eliminate the toxic stomach flora that are linked to an increase in depression and other mood disorders. Their research, which is published at BioMed Central, may provide insight into the management of neurophysiological disorders, such as anxiety and depression, through natural-health products instead of pharmaceuticals.
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