On Valentine's Day, we celebrate love. What a beautiful feeling to be in love! Then we have butterflies in our stomachs and love goes through our stomachs. Somehow funny as some proverbs suggest that emotions like love and our intestines are connected. On the other hand, fear or stress can also influence our digestion, sometimes it can cause some tummy trouble.

Scientists have been asking themselves this question for many years. Most of the research results so far have not been very clear. However, a gastroenterologist from Los Angeles made an exciting discovery in 2013 in connection with probiotics and emotions. In one experiment, two groups of women ate yogurt regularly for four weeks. One half was given a special probiotic yogurt. Afterward, their brains reacted less strongly to negative stimulations than the women who had normal yogurt. The researchers were amazed by the results and could not explain why probiotics had an influence on women's feelings. In the meantime, we already know a little more about the intestinal-brain axis. For example, certain bacteria produce neurotransmitters, hormones such as serotonin and other substances that have an influence on the brain and the nerves.