In this research paper 10 herbal slimming products were purchased from herbal medical stores and e-shopping were analyzed for the purpose of detection of adulterants. The branded and famous or non famous samples were selected for the study to determine the presence of sibutramine and fenfluramine and their analogs. After the examination it was found that out of the 10 samples, S3 (ketamine), S4 (methamphetamine), S5 (Methoxyetamine), S6 (Methoxyetamine), S7 (25I-NBOMe) and S8 (2CT-7) contained suspected adulterant, whereas S1, S2, S9 and S10 are free from any adulterants. The herbal slimming products contain adulterants which may be hazardous to human health. This type of formulation faults are important concern of medico-legal issues because people consuming it, may suffer fatalities due to the adulterations.