The Secret Fat Burner, a weight loss product available on the Internet, contains the illegal sibutramine component and is linked to a number of South Africans who are hospitalized with heart problems or other serious conditions.
This finding has been made by the Association for Endocrinology, Metabolism and Diabetes of South Africa (SEMDSA) after specialists have tested the product by an independent laboratory.
SEMDSA warned in a media statement that the product could cause life-threatening complications.
Doctors warn that dangerous ingredients are not indicated.
According to test results, the drug contains several hormones as well as sibutramine, a drug that is no longer registered for use in South Africa.