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However, it is noted that quite a few of the products are comprised only of gluten free ingredients. Skip to main navigation. Today, after slight exertion I found myself sweating profusely and not feeling good. There are clinic locations all over the United States and Canada. Even though the Optifast products contain plenty of nutritional value for energy, people on all liquid Optifast diets may experience fatigue and dizziness as well as a lowered inclination towards physical activity. After three-four weeks, I switched to the shakes a day.
What is Optifast?
Placebo group: The other group took dummy pills (placebo). Both groups also went on a high-fiber, low calorie diet. These were the results of the 12 week study, which was published in The Journal of The American Medical Association (a highly respected scientific journal): Heymsfield, et al.
1998 As you can see, both groups lost weight. But the group taking Garcinia Cambogia extract actually lost less weight (3.