Do Ayurvedic medicines cure or cause harm? That鈥檚 the question raised by a study showing that 21% of 193 traditional Indian Ayurvedic medicines bought on the internet from US or Indian sources contained high amounts of lead, mercury or arsenic.
One sample of a preparation called Ekangvir Ras had 26,000 parts per million of lead. This compares with a US legal limit of 2 ppm in pharmaceutically produced calcium tablets for the elderly.
In a subset of preparations called Rasa Shastra medicines, minerals with heavy metals are deliberately added. 鈥淎yurvedic practitioners think that if these are mixed properly, they are non-toxic, but that conflicts head-on with conventional scientific thinking,鈥� says of Boston University School of Medicine.
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Saper wants regulators to limit the heavy metals in all food supplements.
Journal reference: (vol 300, p 915)
