There are four phases to the plan, and the first one is severely restricted in carbohydrates. The induction phase lasts two weeks, and the claim is you can lose up to 15 pounds in this time. During this time you consume no more than 20 grams of carbohydrates per day. For example, one slice of bread has 15 grams of carbohydrates, one serving of fruit has 15 grams of carbohydrates, one serving of dairy has 12 grams of carbohydrates, and one serving of vegetables can have between 5 and 15 grams of carbohydrates. It's clear that 20 grams is extremely limited, potentially unhealthy, and would be very difficult to follow for the long-term.
Ironically, I was exploring another diet dimension myself at the time—raw foods. I was eating tons of fruit, nuts, and other cool, uncooked delicacies. Although I felt fine in sunny California, when I went to snowy, cold Manhattan to appear opposite Kathleen Turner and Jason Biggs in The Graduate on Broadway, it was another story. After a few days of work, my body felt cold and my energy was low, but I was determined to stick to my raw regimen. Between rehearsals, I would go out into the winter weather to hunt down wheatgrass juice, pineapples, and mangoes. I found them—it was New York, after all—but I wasn’t feeling all that good. My brain didn’t want to know, but my body was giving me signals that I was out of balance.
Weight loss occurs when the body is expending more energy in work and metabolism than it is absorbing from food or other nutrients. It will then use stored reserves from fat or muscle, gradually leading to weight loss. For athletes seeking to improve performance or to meet required weight classification for participation in a sport, it is not uncommon to seek additional weight loss even if they are already at their ideal body weight. Others may be driven to lose weight to achieve an appearance they consider more attractive. However, being underweight is associated with health risks such as difficulty fighting off infection, osteoporosis, decreased muscle strength, trouble regulating body temperature and even increased risk of death.[3]

Setting the right goals is an important first step. Most people trying to lose weight focus on just that one goal: weight loss. However, the most productive areas to focus on are the dietary and physical activity changes that will lead to long-term weight change. Successful weight managers are those who select two or three goals at a time that are manageable.