A derivative of shellac.

This definitely falls closer to "structured diet" than "alternative dietary lifestyle". In terms of how easy it is to use, nothing beats Jenny Craig. They send you a personalized meal and exercise plan, and assign a consultant to you for weekly one-on-one counseling sessions. While it's easy to use, Jenny Craig can also be your most expensive dieting option. It's a few hundred dollars for the initial registration fee, and each week of prepackaged meals costs $100 or more. However, you get half of your registration fee back if you stay within five pounds of your goal weight for one year, giving you a financial incentive. The portions are small, and some argue that Jenny Craig does all the thinking for you. As soon as you leave the program, you're on your own to make the right choices (a fact that causes some to fall flat and gain the weight back).

Jenny Craig's program incorporates the Volumetrics approach. If you're motivated to unofficially continue "Jenny Craig-ing", then the Volumetrics diet plan is a useful reference guide. If you want some hand-holding and personal support, Jenny Craig may be right for you.