
34. Kefir
The benefit of kefir comes down to the link between gut health and brain health. Fermented foods like kefir are one of the best things that you can eat to encourage a healthy digestive tract. Many hormones, including an estimated 90% of serotonin molecules, are made in the digestive tract.

In lab tests, it was found that consuming kefir and other fermented foods significantly improved the body’s ability to produce GABA, an important hormone that plays a big role in managing mood and the way we handle stress. Decreased levels are seen in people with depression, anxiety, and mood disorders.