I recently read Trick or Treatment: The Undeniable Facts about Alternative Medicine (Simon Singh and Edzard Ernst MD, 2008). Each chapter is about a different alternative medicine, its history, its uses, and all the information the authors could gather from large reputable studies about their effectiveness.Usually when drugs or treatments are tested, some studies show that they work and other studies show that the same treatment does not work. There may be problems with the studies that the researchers do not realize. Before the scientific community comes to a consensus on something, a lot of studies have to be done. Then researchers do mega-analysis of those studies to come out with a verdict.