Optimum Nutrition
THE BIOHACKING STANDARD
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Tribulus terrestris has been meta-analytically studied (Neychev 2016 systematic review) and shown NO testosterone increase in healthy eugonadal men — the evidence base for T-boosting Tribulus claims is essentially disproven. Modest libido effects appear in some studies but are not mediated by T change. Puritan's Pride is a mainstream mass-retail brand with clean labeling (250 mg per cap disclosed, single ingredient) — better transparency than most T-boosters. The single-ingredient format also avoids proprietary-blend autofail. But because the ingredient itself does not support the primary marketed T-boost claim, autofailed under unverified_medical_claim. Would move to Standard 55+ if positioned strictly as libido-support with 'no T-boost' disclosure, or if repurposed for its actual (thin) evidence in female sexual function.
The Vyvata score's Evidence dimension measures the quality of published RCT support for a product's active ingredients at the label dose. Our source hierarchy: double-blind RCTs in MEDLINE-indexed journals > single-blind RCTs > open-label trials > observational studies > mechanism papers > N=1 case studies (anecdotes). Predatory journals and manufacturer-authored studies without independent replication are weighted down.
Product-specific evidence citations for this item are embedded in the analysis text on the "Analysis" tab. For the full framework and evidence hierarchy, see the methodology page.
FAQ data has not been generated for this product yet. See the site FAQ for general questions.
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