Health Canada, a drug and health regulatory body, has once again said some Ayurvedic products may contain high levels of heavy metals, such as lead, mercury and arsenic. Saying these medicines may pose serious health risks, the Canadian regulator has asked people to exercise caution while purchasing them. The move is based on an article in the March 2008 edition of the British Columbia Medical Journal, detailing how an adult male had symptoms of vomiting and diarrhoea, believed to have been caused due to heavy metal poisoning by consuming one tablet a day of Puspadhanva Rasa, manufactured by Shri Dhanwantri Ayurvedic Pharmacy of India. The patient purchased the drug from India and used it over a number of years to