Every score is backed by peer-reviewed research. We don't accept payment for better grades, we don't rely on manufacturer claims, and we certainly don't guess.
Your supplement receives a score from 0-100 based on four key pillars
Are all ingredient amounts clearly listed? No proprietary blends hiding dosages?
Does each ingredient meet minimum effective dose from clinical studies?
Are ingredients in their most bioavailable forms with optimal absorption?
FDA compliance, third-party testing, absence of banned substances
From exceptional to failing, here's what each grade means
Exceptional transparency, clinical dosing, and premium forms throughout
Solid product with good transparency and mostly proper dosing
Below average with multiple issues and several areas needing improvement
Major concerns with transparency, dosing, or safety - not recommended
We maintain a continuously updated database of over 500 common supplement ingredients
Peer-reviewed studies
Systematic reviews
Dietary Supplements
European Safety Authority
How we determine effective dosages
To maintain scientific integrity, here's what we consider and what we don't
Awards earned through verified criteria, not marketing dollars
All active ingredients meet research thresholds
Independent lab verification available
No proprietary blends hiding dosages
Premium ingredient forms throughout
Manufactured in FDA-registered facility
Not sponsored or affiliate influenced
Manufacturers cannot pay for better scores. All products analyzed using identical criteria.
Our methodology is public. Our sources are cited. Our updates are logged.
We never sell your data. Anonymous insights only. You own your supplement history.
Everything you need to know about our methodology
Every SuppMan score represents hours of research distilled into actionable information. We're not here to sell you supplements—we're here to help you understand what you're already buying.