GONZALEZ RENGIFO, Gustavo, Editor of “MACA, from Tradition to Science”, Faculty of Science and Philosophy, Department of Biological and Physiological Sciences and Institute of the Altitude Research, Universidad Peruana Cayetano Heredia, CONCYTEC 1st. Edition, September 2006, 230 pages, Lima Peru.



Dr. Gustavo Gonzales, editor of the book “MACA from Tradition to Science,” highlights the studies on the biological actions of maca in an experimental level as well as in humans. He accomplishes interesting general conclusions, following the compilation of the developed researches, being able to cite the following:


  • Maca has a favorable effect from the 2nd week of treatment improving the mood, and decreasing the anxiety, and from the 8th week, maca improves the sexual appetite.
  • Maca has a favorable effect on stress from the 4th week of treatment.
  • The systolic and diastolic arterial pressures decrease with maca treatment.
  • The artery oxygen saturation, cardiac frequency and hematocrit do not show changes during the 12 weeks of treatment.
  • Maca favors the caloric reserve of the male subjects studied.
  • Maca does not have an effect on the nutritional behavior, or glycemia levels (diabetes.)
  • Maca favors an increase in the synthesis of Dehydroepiandrosterone sulfate (1) (>DHEA/DHEA) from the second week of treatment and up to the 12th week.
  • Maca favors the production and motility of spermatozoids and seminal volume.

    (1) Dehydroepiandrosterone (DHEA) is an endogen prohormone produced by segregation of the suprarenal glands. It is a precursor of androgens and estrogens. Among many other uses, it is known that is effective for the prevention of aging and as sex stimulant.