Dietary Supplement. The only clinically tested Hoodia shown to significantly reduce appetite. Look for our seal of authenticity. do not accept substitutes. Dex-L10 is the only Hoodia Gordonii product that is independently certified and clinically tested. 100% Certified Hoodia Gordonii from Kalahari Desert. Abarex, a third party raw material certification firm, carries out independent certification process which starts in South Africa where the material is first harvested. Hoodia Gordonii designed to bear our DEX-L10 seal is harvested by permit from republic of South Africa, national department of agriculture- directorate of plant health & quality. The freshly harvested DEX-L10 Hoodia Gordonii is then dried and milled into fine powder and is analyzed by an independent lab in South Africa prior to export. Analytical data is the basis for the certificate of analysis to determine origin, batch control and product classification. Upon entry into the United States, Abarex enlists private and academic laboratories to provide detailed analysis of the DEX-L10 Hoodia Gordonii. They utilize the latest in micro and macroscopic evaluations along with other standardized tests in verity and check the previous reported analysis. This extra step in testing ensures that only the finest Hoodia Gordonii is used in the manufacture of DEX-L10. Clinically tested. Dr. Richard M. Goldfarb, medical director of a Philadelphia clinical research facility conducted a clinical a study on weight loss using the DEX-L10 brand Hoodia Gordonii. In the 28 day study participants lost an average of 3.3 percent of their bodyweight and the median weight loss was 10 pounds. The study concluded that the benefit of DEX-L10 Hoodia Gordonii justifies its use for healthy weight loss and for the treatment of obesity.