Three recent studies show the benefits of healthy eating, probiotics, and vitamin B6 supplements for alleviating depression and anxiety — Last month, headlines flashed the news that a major review article had found “no clear evidence” that low serotonin levels cause depression and called into question whether taking selective serotonin reuptake inhibitor (SSRI) antidepressants is worthwhile. However, most experts were not surprised that low serotonin levels are not the sole…