R&D Diet Cookie is a weight loss program that promotes rapid weight loss. “There is nothing more motivating than seeing the pounds fall off when you weigh” says Ms. Palmer. “If you are otherwise healthy, the cookie is designed to replace daytime meals… breakfast, lunch and snacks. They contribute about 400 calories total and completely eliminate hunger and cravings." The hardest part, she claims, is convincing yourself that losing weight quickly is OK.