Hydroxycitrate as a Weight-Loss Ingredient: Literature review by Quackwatch.
PubMed: Effects of (-)-hydroxycitric acid on Appetitive Variables: Abstract of a clinical trial in overweight females taking HCA before meals. Those taking the drug lost more weight, but there was no correlation with satiety.
PubMed: The Effect of (-)-hydroxycitrate on Energy Intake and Satiety in Overweight Humans: Abstract of a small clinical trial showing that subjects given HCA tended to eat less without less satiety.