Also known as: lepidium meyenii, peruvian ginseng
Latest evidence update: 2025-09-01
Strongest in Study quality (72). Held back by Replication (45).
Solid mix of RCTs with some methodological gaps.
Some independent replication, statistical precision uneven.
Thousands of participants across the literature.
Mostly aligned, with some divergence.
Evidence base skews older; field may have moved on.
No per-outcome numbers yet for this one. Each finding's direction and strength is shown in the research below.
Areas where research points to a consistent direction of effect. The strength of evidence is graded; the size of the effect is not quantified.
Recommended: 1.5-3g daily
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May improve sperm concentration in men with mild fertility issues
Significantly improves sperm production and quality in stallions
Enhances physical performance and reduces fatigue in animal studies
Does not improve athletic performance or fatigue in trained basketball players
May reduce depression symptoms and lower blood pressure in postmenopausal women