Look across the research
We examine the broader body of scientific evidence—not one exciting study, influencer claim, or company headline.
Quality · consistency · relevance
How it works
From complicated research
to a clearer decision.
We look across the scientific evidence on supplement ingredients and translate it into simple, transparent scores—so you can see what the science says before you decide.
See how we score ↓The process
We don’t follow one headline.
We follow the evidence.
Match it to your health goal
An ingredient can perform differently for sleep, strength, or brain health. We score the specific reason you might take it.
One ingredient · different answersSeparate the key questions
Efficacy, safety, and confidence are distinct. Keeping them separate makes important tradeoffs easier to see.
Works? · Safe? · How sure?Show our work
Every conclusion connects back to the evidence, so you can explore the research and cross-check the answer yourself.
Transparent · traceable · currentThe science score
One supplement.
More than one answer.
“Does it work?” is the wrong question. The better question is: does it work for what you want it to do?
Cr
IngredientCreatine
Muscle strengthEfficacy
8.7/10
Strong support
Safety
8.9/10
Generally well tolerated
Strength of evidenceVery strong
Supported by many well-designed studies with consistent findings.
See the evidence behind this score →Clearer by design
Three scores. No hidden tradeoffs.
A single overall rating can blur what matters. We keep the questions separate.
Does the evidence suggest it works?
Summarizes how supportive the overall research is for a specific health goal.
What does the evidence say about risk?
Highlights side effects, interactions, and concerns for particular groups.
How sure are we?
Reflects the amount, quality, consistency, and relevance of the research.
What guides us
Built to inform.
Never to influence.
Our job is to make the evidence understandable—not to tell you what to buy.
No paid influence
Supplement companies cannot pay for a better score. We don’t manufacture or sell supplements.
Transparent by default
A score should never be a black box. We show the reasoning and sources behind it.
Designed to change
New trials, reviews, and safety findings can strengthen or weaken a score. That is science working.
Useful whether you pay or not
Premium supports continued research and additional tools. Paying never changes what the science says.
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Don’t blindly trust Science Sayz.
See the evidence for yourself.
We benchmark our conclusions against respected independent health and research sources where appropriate. These organizations do not endorse Science Sayz; they are reference points you can use to check our work.
NIHMayo ClinicMemorial Sloan KetteringPublished research
Make a more informed decision
See what the science says.
Explore supplement evidence by ingredient and health goal.
Explore ingredients →Science Sayz is educational and is not a substitute for advice from your doctor or another healthcare professional.