A new row in South Africa is pitting an influential AIDS lobby group who are pushing President Thabo Mbeki's government to provide more free anti-retroviral (ARVs), against a vitamins salesman who says ARVs are poison. The Treatment Action Campaign (TAC), which resorted to legal action to force the government to roll out ARVs nearly two years ago, has returned to court to try to win an order against German-born Matthias Rath, who claims that vitamins can reverse the course of HIV/AIDS.