They are open seven days don't know how they do it.
They also found that gastrointestinal adverse events were twice as likely in the hydroxycitric acid group as in the placebo group.
When you are considering the potential benefits of products look for meta-analysis studies that take in all the sound research available. One-off studies that get a significant result are not evidence of anything.
Only when an effect is repeated in many studies by many scientists should you believe.