New studies show the relationship between healthy gut bacteria and how happy and anxious we feel. One study done by Canadian researchers gave cocktails of antibiotics to mice. The loss of the healthy bacteria brought on by the effects of the antibiotics made the animals more anxious. When gut bacteria was taken from healthy mice and transferred to these mice they appeared to become much calmer. More and more studies are being done on how gut bacteria can help with some brain disorders such as obsessive-compulsive disorder and ADHD. Because bacteria is thought to influence the immune system, a strong connection is now being made to both anxiety and depression. Fiber rich foods, especially from dark green leafy vegetables, provide nourishment for good bacteria to grow. This along with avoiding taking any unnecessary antibiotics can strengthen our gut and create peace of mind.