Kefir is an ancient drink that originated in Russia. Similar in taste to yogurt, kefir is made from fermented milk and is slightly sour. Its popularity has soared in recent years because of growing interest in probiotics, which are known to boost the immune system and support good digestive health. Kefir contains more than 30 probiotic cultures that can alleviate and treat many intestinal conditions, such as candidiasis, diarrhea and constipation.
Kefir is rich in vitamins A, B1, B12, D and K, tryptophan and biotin (a water-soluble B-complex vitamin, which helps the body assimilate other B Vitamins). It has a relaxing effect on the nervous system and may relieve symptoms of anxiety and benefit people who have sleeping problems. It also has positive effects on depression, as well as on ADHD (attention deficit hyperactivity disorder). It helps our mind control stress and stay sharp and clear, while vitamin D reduces nervousness and prevents and treats tension headaches. Kefir is also abundant in tryptophan, an essential amino acid that our body uses to produce serotonin, which promotes relaxing effects on our brain.