Friday, Jul 24, 2026 The claims desk. Receipts included. POWERED BY LENZ ↗
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HEALTH

The Claim

Maca root is scientifically proven to boost libido in humans.

Verified by Lenz ·

The Short Version

The phrase "scientifically proven" significantly overstates what the evidence actually shows. While several small randomized controlled trials have found statistically significant improvements in sexual desire with maca root, the systematic reviews synthesizing this research explicitly conclude the evidence is "too limited to draw firm conclusions." Positive findings are confined to specific subpopulations, sample sizes are small, and no large confirmatory trials exist — falling well short of the robust consensus implied by "proven."

Caveats

  • Systematic reviews (PubMed/PMC) explicitly state the evidence is 'too limited to draw firm conclusions' and call for larger, more rigorous studies — directly contradicting the word 'proven.'
  • Positive results come from small, short-duration RCTs in specific subpopulations (e.g., men after 6–8 weeks, women with antidepressant-induced dysfunction), not humans broadly as the claim implies.
  • The mechanism of action remains unclear — maca does not appear to alter hormone levels like testosterone or estradiol, and no established biological pathway explains any observed libido effect.

The Receipts

  1. Study of Maca Root to Treat Sexual Dysfunction Associated With the Treatment Regimen for Bipolar Disorder in Females | ClinicalTrials.gov

    ClinicalTrials.gov

  2. Maca (L. meyenii) for improving sexual function: a systematic review - PubMed

    PubMed

  3. Maca (L. meyenii) for improving sexual function: a systematic review - PMC

    pmc.ncbi.nlm.nih.gov

  4. Effect of Lepidium meyenii (maca) on sexual desire and its absent relationship with serum testosterone levels in adult healthy men

    PubMed

  5. Effects of Lepidium Meyenii Walp on Sexual Function in Postmenopausal Women

    ClinicalTrials.gov

  6. A Double-Blind Placebo-Controlled Trial of Maca Root as Treatment for Antidepressant-Induced Sexual Dysfunction in Women - PMC

    PMC

  7. Effect of Lepidium meyenii (MACA) on sexual desire and its absent relationship with serum testosterone levels in adult healthy men - PubMed

    PubMed

  8. A Double-Blind Placebo-Controlled Trial of Maca Root as Treatment for Antidepressant-Induced Sexual Dysfunction in Women - PMC

    pmc.ncbi.nlm.nih.gov

  9. A Double‐Blind, Randomized, Pilot Dose‐Finding Study of Maca Root (L. Meyenii) for the Management of SSRI‐Induced Sexual Dysfunction - PMC

    pmc.ncbi.nlm.nih.gov

  10. Exploring the chemical and pharmacological variability of Lepidium meyenii: a comprehensive review of the effects of maca - PMC

    pmc.ncbi.nlm.nih.gov

+ 8 more sources — see the full list on Lenz

Filed Under

Maca Root