"Every year thousands of foreign tourists travel to the Peruvian Amazon to experiment with ayahuasca, a bitter, dark-coloured brew made of a mixture of native plants. The hallucinogenic cocktail, also known as yage, has been venerated for centuries by indigenous tribes in Brazil, Peru, Ecuador and Colombia as a cure for all sorts of ailments. But it is also increasingly consumed by Western tourists looking for mind-altering experiences, sometimes with deadly consequences. Arevalo was a staunch defender of indigenous people’s rights in the region. She also practised a traditional form of singing medicine that the Shipibo believe removes negative energies from individuals and groups. She can be heard singing a traditional plant song on the website of the Temple of the Way of Lights, which describes itself as a plant-shamanic healing centre in the Peruvian Amazon."