Referenties:
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Gonzales GF, Amanda Cordova, Carla Gonzales, Arturo Chung, Karla Vega, Arturo Villena. Lepidium meyenii (Maca) improved semen parameters in adult men. Asian J. Andrologia 2001; 3(4): 301-303.
Gonzales GF, A. Cordova, K. Vega, A. Chung, A. Villena, C. Gonez and S. Castillo. Effect of Lepidium meyenii (MACA) on sexual desire and its absent relationship with serum testosterone levels in adult healthy men. Andrologia 2002; 34(6): 367-372.
Zenico T, Cicero AF, Valmorri L, Mercuriali M, Bercovich E. Subjective effects of Lepidium meyenii (Maca) extract on well-being and sexual performances in patients with mild erectile dysfunction: a randomised, double-blind clinical trial. Andrologia 2009; 41(2): 95-9.