Figure 1.

Percentage of subjects perceiving an increase in sexual desire following a 12-week treatment with the placebo or a spray-dried extract of red or black maca at low (Upper) and high altitudes (Bottom). Bars are standard error. At LA, consumption of spray-dried extract of red maca increases the percentage of subjects with increased sexual desire over time (p = 0.0055). p > 0.05 between placebo and maca-treated groups. HA: p = 0.0027, p = 0.0000, and p = 0.0019 over time for treatments with placebo, red maca, and black maca, respectively. p = 0.03 (chi square = 6.96) at week 12 between treatment with spray-dried extract of red maca and placebo or spray-dried extract of black maca.