This work was supported in part by a grant from the Consejo Nacional de Ciencia y Tecnologla (CONCYTEC). We thank W. Behrens and C. Santa Cruz for helpful advice on HPLC analysis and T. cruzi culture, and H. Guerra and C. Guerra for critically reading the manuscript.

This work was supported by the Fondo Nacional de Desarrollo Cient?fico, Tecnol?gico y de Innovaci?n Tecnol?gica (FONDECYT-PERU) under Grant 190-2015-FONDECYT-DE which provided a fellowship for David Valqui-Pe?a. We thank Mois?s Alderete, Arturo C?rdenas, and Efra?n Z??iga for providing the seed accessions of maca. We are also grateful to Ang?lica P?rez, Jonhny V?lchez, Ovaldo Rojas, and Fluber Mamani, as well as the ?Asociaci?n de Productores Agropecuarios Org?nicos de Carhuamayo? for generously sharing their knowledge on this crop. Finally, we thank Cristina Guerra-Giraldez for proofreading the?manuscript.

We greatly acknowledge BSc Rosario Tapia for thetechnical assistance with the animals. This work wassupported in part by the Consejo Nacional de Ciencia yTecnologia (CONCYTEC) Lima, Perú, the InstitutFranc ̧ais d’Etudes Andines (IFEA), Lima and the San-doz Laboratories, Rueil, France.