The short answer · Libido or sexual desire
Take tribulus terrestris for libido or sexual desire. This is the one to buy.

Nutricost, Tribulus, 240 Capsules (750 mg per Capsule)
4.7· 2,042 ratings· $0.13/serving
Tribulus Terrestris 1500 mg — inside the studied 500-1500 mg window
Of 640 products scored for Libido or sexual desire, Nutricost, Tribulus, 240 Capsules (750 mg per Capsule) ranks #1 with a DoseRank score of 82. Tribulus Terrestris has moderate human evidence for this outcome.
Retailer links may be affiliate links. Rankings and placement are never paid.
The form“Why Tribulus Terrestris — not Maca?”Evidence Moderate evidence
Tribulus Terrestris has moderate human evidence for this outcome.
- Tribulus TerrestrisThe pick
Moderate evidence · 1500 mg
Flowering plant used in traditional medicine; widely marketed for testosterone support and libido, but clinical evidence for hormonal effects in healthy adults is weak.
- Maca
Moderate evidence · 2100 mg
Peruvian cruciferous root used as an adaptogen; traditionally associated with energy, libido, and hormonal balance, though human evidence remains mixed.
The dose“Is the dose actually effective?”Dose fit 90
Tribulus Terrestris at 1500 mg lands inside the studied 500-1500 mg window.
Tribulus Terrestris
Studied window 500-1500 mg · this pick 1500 mg
The ranking“Why should I trust this pick?”Trust 83
Solid trust signals from buyer ratings, with room to grow. Each product gets a DoseRank score blending clinical strength, evidence, dose fit, trust and value. Retailer links may be affiliate links — the scoring model decides placement, never payment from a brand.
- 640 products scored
- Never paid placement
- Evidence level: Moderate · 78
- 164 brands
- 6 ingredients
The price“Can I do better than $0.13 a serving?”Value 74
$0.13 per serving — mid price tier for this outcome. The cheapest ranked pick here is $0.06 per serving.
- 7Swanson Vitamins, Full Spectrum® Tribulus Fruit, 500 mg, 90 CapsulesScore 78 · $0.06/servingiHerb
- 9NOW Foods, Sports, Tribulus, Men's Health, 500 mg, 100 Veg CapsulesScore 78 · $0.10/servingiHerb
Why not the absolute cheapest? The DoseRank score also weighs clinical strength, evidence, dose fit and trust — the very cheapest listings rarely hold up everywhere else.
Ready?
The #1 pick is $0.13 a serving.Nutricost, Tribulus, 240 Capsules (750 mg per Capsule) — in stock at a tracked retailer.
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Nutricost, Tribulus, 240 Capsules (750 mg per Capsule) ranks #1 for Libido or sexual desire with a DoseRank score of 82. The score blends clinical strength, evidence, dose fit, trust signals and value across 640 products scored for this outcome.
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