I tried the Slimfast diet in the late nineties. I lost exactly 10 pounds in 1 month. I drank 2 Slimfast cans of the premixed Slimfast and had a sensible dinner. I may have had 1/2 cup of non-fat yogurt in between meals 1-2 times, or fresh fruit. I drank plenty of water. I worked on my feet, but just did some of my exercises at home when I had the time, which was not daily. I went down one size and you could tell! I wasn't too overweight, but I did want to lose more. I stopped the Slimfast diet and just was very careful about what I ate. I then joined a gym and went 3 times a week. From then, I lost 15 more pounds within 2 months. I am going on the Slimfast diet again, 40 years later, and incorporating swimming. I hope it will work as well as it did in the past.