Understand the ingredient before you judge the product.
Twenty evidence-led guides to ingredients commonly used in men's performance, testosterone-support and healthy-ageing supplements. We separate what has actually been studied from what a label implies.
Browse ingredient guides →
Evidence first
Human trials, systematic reviews and authoritative sources take priority over marketing language.
Dose in context
A study amount helps evaluate a label, but it is not automatically a universal recommendation.
Safety is part of efficacy
Interactions, upper limits and population boundaries are evaluated alongside potential benefits.
Ingredient evidence guides
Published guides are linked below. Remaining approved Phase 1 ingredient guides stay visible as planned discovery topics without creating dead links.
Tongkat Ali: Benefits, Dosage and Safety
Understand tongkat ali evidence before buying a product containing it
Read guide → PublishedAshwagandha for Men: Testosterone, Stress and Evidence Review
Understand ashwagandha evidence for testosterone and stress
Read guide → PublishedFenugreek and Testosterone: What the Evidence Shows
Understand fenugreek's evidence base for testosterone support
Read guide → PublishedD-Aspartic Acid (DAA): Does It Raise Testosterone?
Understand DAA evidence and dosing before choosing a product
Read guide → PublishedZinc for Testosterone and Male Health: Evidence Guide
Understand zinc's role in testosterone and when supplementation helps
Read guide → PublishedMagnesium and Testosterone: What Research Supports
Understand magnesium's evidence for testosterone and sleep
Read guide → PublishedBoron: Testosterone, SHBG and What's Actually Proven
Understand boron's evidence for free testosterone
Read guide → PublishedCreatine Monohydrate: Benefits, Dosage and Safety
Understand creatine before selecting a supplement
Read guide → PublishedVitamin D and Testosterone: Evidence and Dosing
Understand vitamin D's link to testosterone and deficiency risk
Read guide → PublishedMaca Root for Libido and Energy: What the Evidence Shows
Understand maca root evidence for libido and energy
Read guide →Tribulus Terrestris: Does It Actually Raise Testosterone?
Understand tribulus evidence, including negative findings
Coming in a later batchPanax Ginseng for Male Vitality and Performance
Understand ginseng evidence for energy and sexual function
Coming in a later batchFadogia Agrestis: Evidence, Safety Concerns and What's Unknown
Understand the limited evidence and safety profile of fadogia agrestis
Coming in a later batchShilajit: Traditional Use, Evidence and Safety
Understand shilajit evidence for testosterone and energy
Coming in a later batchL-Citrulline for Performance and Circulation
Understand citrulline evidence for exercise performance and blood flow
Coming in a later batchSaw Palmetto and Men's Health: What It Is and Isn't Evidenced For
Understand saw palmetto's evidence for prostate health, not testosterone
Coming in a later batchGinkgo Biloba for Circulation and Cognitive Support
Understand ginkgo evidence for circulation and cognitive function
Coming in a later batchKSM-66 vs Standard Ashwagandha Extract: Does the Form Matter?
Understand whether patented extract forms matter for efficacy
Coming in a later batchProprietary Blends Explained: Why Ingredient Doses Matter
Understand why undisclosed proprietary blends make efficacy unverifiable
Read guide → PublishedUnderstanding Testosterone Evidence Labels: Strong, Moderate, Preliminary, Insufficient
Understand how this site labels evidence quality so readers can weigh claims themselves
Read guide →
One ingredient name does not equal one level of evidence.
We distinguish strong, moderate, preliminary and insufficient evidence, and we keep manufacturer claims separate from independent research.
Extract type, dose, study population, outcome measured and safety context can all change how confidently a finding applies to a real product.
Understand our evidence labels →Know the ingredient. Then compare the formulas.
This library explains what the evidence says about individual ingredients. If you want to see currently catalogued supplements containing those ingredients, continue to the MenPS ingredient directory.
Evidence & Label Guides
Use these guides to understand how evidence strength and formula transparency are evaluated across the Ingredient Library.