Tibetan medicine has been practised for more than 1,000 years in Ladakh, in India’s far north. The very survival of this complex system of healing, ritual and belief — known as Amchi medicine — was threatened by the 20th century’s huge social changes. But over the past six years French anthropologist and ethno-pharmacologist Laurent Pordié has led a campaign that will help ensure Ladakhis continue to benefit from Amchi medicine for generations to come.