Many of the products are marketed as "dietary supplements" and claim to be "natural" or contain only "herbal" ingredients. But the FDA said some of the pills include sibutramine, a controlled substance; rimonabant, a drug not approved for marketing in the U.S.; phenytoin, an anti-seizure medication; and phenolphthalein, a suspected carcinogen.
Many of these products contain medication or chemicals that may raise your blood pressure in the very list and may kill you at the most. Even more a lot of these products (maybe all) have no scientific bases that they actually work.
All the medications that we dispense at our Medical weight loss center are FDA [government] approved and fully endorsed by the American Society of Bariatric Physicians and the American Board of Bariatric Medicine.
—Dr Oksana Aron
Medical Director New York weight loss center