This would require high participant retention through the follow-up period, as well as continuing commitment and interest on the part of participants, so researchers who may want to investigate this type of question would do well to plan on it from the study's inception.
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A Look at Some Human Studies Fortunately, I also found several human studies on Garcinia Cambogia. All of these studies are so-called randomized controlled trials, which are the gold standard of scientific experiments in humans.
The biggest of the studies included 135 overweight individuals, which were split into two groups (7): Treatment group: 1 gram of Garcinia Cambogia Extract, 3 times per day, taken 30 minutes before meals.