Is sam e a good for a natural anti depressant?

SAM-e: Taking sam-e orally can possibly improve the symptoms of depression. Several clinical studies show sam-e to be more effective than placebo, and at least as effective as tricyclic antidepressants, in trials up to 42 days. Some of these studies are limited by low #'s of patients, inconsistent diagnostic criteria, and short trial length. Dose is 400-1600mg/day -- which can become expensive.