More than 20 million American adults live with depression, or an estimated 10% of the U.S. population. 2.3 million live with bipolar disorder. If you're suffering from bipolar disorder or depression, you're simply not alone. In women ages 40-59, 1 in 4 are now taking antidepressants. So what can you do? One key tool with remarkable efficacy are support groups, and there's a real science behind this. It is a means to deal with a largely genetic condition by creating an environment that changes gene expression.