Weight Watchers: Weight Watchers is a diet plan first developed in the 1960s that encourages weight loss by making healthy food and lifestyle choices. The Weight Watchers plan is based upon the idea that dieting is only one part of a healthy lifestyle. The program stresses the importance of overall mental and physical health and well-being. Weight ... Found on http://www.medterms.com/script/main/art.asp?articlekey=64058