Bob, Joy and All, Two years ago I tried NADA (Enada) per directions for PWP for about 6 months. It was costing about $100 per month and did not have any descernable effect. A doctor at a PD conference I attended answered when I asked about NADA, that NADA had never been tried in double blind studies, the inventor refused to do double blind studies, and every purchase only bought him another house. Sue