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A 15-day, randomized clinical trial published in 2011 evaluated Hoodia gordonii purified extract (HgPE) relative to placebo. Healthy, overweight women (n=64) received 1,110 milligram HgPE or placebo formulated in a yogurt drink one hour before breakfast and dinner. Menus otherwise were unchanged and portions were not controlled. HgPE was less well-tolerated than placebo due to episodes of nausea, vomiting, and skin sensations. Blood pressure, pulse, heart rate, bilirubin and alkaline phosphatase were significantly increased in the HgPE group. No significant effects on energy intakes or weight relative to placebo were demonstrated.