Stay Flexible, Stay Well 1 of 5 Depression Low brain levels of the neurotransmitter GABA are often found in people with depression; SSRIs, electroconvulsive therapy, and now yoga, it seems, can boost GABA. Preliminary research out of the Boston University School of Medicine and Harvard's McLean Hospital found that healthy subjects who practiced yoga for one hour had a 27 percent increase in levels of GABA compared with a control group that simply sat and read for an hour. This supports a growing body of research that's proving yoga can significantly improve mood and reduce the symptoms of depression and anxiety. Heart disease » From Stay Flexible, Stay Well in the October 2007 issue of O, The Oprah Magazine. Subscribe now!