 That's why Ph.D., weight loss, and nutrition was a godsend for me because I lost 53 pounds. I'm keeping it off. I know what to eat. I know what not to eat, and I am never, ever hungry. I felt great the first week I started on the program. The second day, I had a little bit of hunger at one point in the afternoon, and that's been it. I mean, you can use their food. You can use your food. Use a combination of both, which is kind of what I did.