ABOUT
What we do, why we built it, and who it's for.
MetricFit is a small research team built on one belief: supplement advice should start with evidence, not with products. Most of what passes for guidance in this industry begins with something to sell and works backward to a reason. We built the pipeline we wanted to use instead — understand first, recommend second, disqualify poor matches actively.
What we do. We turn a 5-minute health assessment into a personalized supplement plan. The assessment traces your concerns to their root causes, then matches ingredients against human-trial evidence — with safety screening as a hard veto, not an afterthought. Every recommendation is readable and challengeable: you can see which question flagged a concern and which trial backs the ingredient.
Why we built it. Trial and error costs hundreds of hours, and self-prescribing can be unsafe. The same insomnia can be stress in one person and a magnesium or B6 deficiency in another — yet most advice treats them identically. We wanted a system that asks before it recommends, and one that says no loudly when the evidence or the safety screen says no.
Who it's for. People who take their health seriously and want evidence over marketing — whether you're filling a diagnosed gap, supporting a specific goal, or simply tired of guessing. It is a nutrition-education tool, not a diagnosis or treatment advice; for any health intervention, talk to a doctor.
How we stay honest. The site is free because recommendations may use affiliate links — disclosed on every relevant page, under a unified commission model so no brand can pay to rank higher. Safety vetoes and evidence grades run before any commercial logic, and a product that fails the screen never appears at any price.
WHY WE'RE DIFFERENT
Not ingredient stacking — a complete screening path from root-cause analysis to safety.
Four steps (Fill nutritional gaps → Nurture the gut → Face pain points → Long-term anti-aging) × Four gates (Evidence → Root-cause → Custom → Precision). Not symptom-chasing — progressive, long-term.
Same insomnia, different causes: stress in one person, magnesium/B6 deficiency in another. We trace the root cause before recommending — only supplements consistent with your situation appear.
2,400+ biomarker-level analysis ensures ingredients complement rather than duplicate — which combinations are synergistic and which are redundant, determined by data.
Only human controlled trials count as recommendation evidence. Claims without human data are directly disqualified.
Most brands offer only a dozen ingredients. We've deeply researched 140+, compared alternatives head-to-head — and only recommend the better option.
Same ingredient, very different products. We screen 10,000+ products by sourcing, brand, manufacturing, and third-party testing before anything enters our pool.
6,100+ medication and disease contraindication checks. Safety is the first gate, not a slogan.
No advertisers, no sponsored placements. When you buy through a link, partner platforms pay us a referral commission — at one standard rate for every product, so no brand can buy a better ranking. The only thing that moves a supplement up the list is the evidence.