Nonsense. For all the heavy-duty advertisers, there are dozens if not hundreds of honest herb and vitamin makers. I'm talking about honest, good companies like Shiff, Twinlab, Avita, and Oy-Ex. Anything that promises "effortless" weight loss (especially) should be eyed with suspicion.
And, for the record, St. Johns Wort has been helpful to some. However, someone with a major case of depression should (a) have a physical done to see if there's a physical cause, and (b) seek psychological counseling. I don't think throwing something in pill-form at the problem without the rest will do a very good job.
Let's do try to remember, too, that many of the products sold (also with mass advertising) by pharmaceutical companies have proven to be worthless at best, and life-threatening at worst. Just because it's prescribed doesn't mean it's safe, or that it's effective.
Allow me to add the names NOW Foods, Pure Encapsulations, Enzymatic Therapy and Vitamin Research Products (VRP).