Infrared (IR) spectra of lyophilized aqueous extract of three ecotypes of Lepidium meyenii (Maca). Data are expressed in absorbance units (A). Wave number is expressed in cm-1. IR spectra were measured from 4000 cm-1 to 650 cm-1 with a FT-IR spectrophotometer equipped with an ATR apparatus. Highest absorbance values correspond to Red Maca, intermediate values to Yellow Maca and lowest values to Black Maca. Peaks of absorbance are recorded at 3291 cm-1, 2927 cm-1, 1614 cm-1, 1406 cm-1, 1022 cm-1, 924 cm-1 and 862 cm-1.