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Related Experiment Video

Updated: Dec 15, 2025

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Does Lepidium meyenii (Maca) improve seminal quality?

Ana María Alcalde1, Jordi Rabasa1

  • 1Gynaecology and Obstetrics Department, Faculty of Medicine, Hospital Vall d`Hebron, Autonomous University of Barcelona, Barcelona, Spain.

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|July 13, 2020
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Summary

Maca supplementation (2g/day for 12 weeks) significantly improved sperm concentration in infertile men. However, it did not affect semen volume, motility, or morphology in this pilot study.

Keywords:
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Area of Science:

  • Reproductive Medicine
  • Ethnobotany
  • Clinical Trials

Background:

  • Maca (Lepidium meyenii), a Peruvian plant, is traditionally recognized for fertility-enhancing properties.
  • Existing research on maca's effects on semen quality necessitates rigorous randomized, double-blind trials for clinical decision-making.

Purpose of the Study:

  • To evaluate the impact of maca supplementation on seminal parameters in adult males experiencing infertility.
  • To provide evidence-based insights into maca's efficacy for male fertility enhancement.

Main Methods:

  • A 12-week, double-blind, randomized, placebo-controlled pilot trial.
  • Sixty-nine infertile adult men with mild asthenozoospermia and/or mild oligozoospermia were randomized.
  • Participants received either 2g/day of maca (n=35) or a placebo (n=34).

Main Results:

  • Maca treatment resulted in a significant increase in sperm concentration compared to placebo (p=0.011).
  • No significant differences were observed in semen volume (p=0.392), sperm motility (p=0.462), or normal sperm morphology (p=0.801) between groups.

Conclusions:

  • Daily maca supplementation (2g) for 12 weeks significantly enhanced sperm concentration in infertile men.
  • Maca did not demonstrate significant effects on semen volume, sperm motility, or morphology in this study population.