Evidence-based & safety-first · Take the 5-min assessment →

MetricFit supplement recommendations are built differently —

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  • Completely free
  • We actively disqualify poor matches
  • Your data stays private

WHY WE'RE DIFFERENT

Why our recommendations are better

Not ingredient stacking — a complete screening path from root-cause analysis to safety.

01

Proprietary 4+4 Anti-Aging Framework

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.

02

131-Question Root-Cause Analysis

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.

03

2,400+ Biomarker Synergy Mapping

2,400+ biomarker-level analysis ensures ingredients complement rather than duplicate — which combinations are synergistic and which are redundant, determined by data.

04

Human Trials Only

Only human controlled trials count as recommendation evidence. Claims without human data are directly disqualified.

05

140+ Ingredient Screening

Most brands offer only a dozen ingredients. We've deeply researched 140+, compared alternatives head-to-head — and only recommend the better option.

06

10,000+ Product Screening

Same ingredient, very different products. We screen 10,000+ products by sourcing, brand, manufacturing, and third-party testing before anything enters our pool.

07

6,100+ Safety Screening

6,100+ medication and disease contraindication checks. Safety is the first gate, not a slogan.

08

Zero Ads, One Standard

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.

EVIDENCE SYSTEM

Data-backed, not hand-waved

140+Ingredients deeply researched
20-tierProprietary grading system
2,400+Biomarker-level analysis
6,100+Medication–supplement interaction checks

WHAT WE COVER

Your concerns, covered

21 categories of health concerns — every one addressed by the assessment.

HOW IT WORKS

Three steps from "What should I take?" to an evidence-based answer

1

5-Minute Assessment

131 questions, adaptive to your profile: diet, lifestyle, health concerns, and budget preferences — understand first, recommend second. Multiple-choice, resumable anytime.

2

Root-Cause Tracing

We trace your concerns to their root causes, with evidence grading and contraindication screening — readable, challengeable.

3

Matched Recommendations

Matched by profile with dosing, cycling, and combination clearly explained. Poor matches are proactively disqualified.

INSIGHTS

Our take, one piece at a time

Distinctive, evidence-backed opinions across all 21 health categories — each with references.

Iron: Why the Blood Test Comes Before the Supplement

Nutritional Gaps · October 12, 2026

Iron: Why the Blood Test Comes Before the Supplement

Iron is the most self-prescribed supplement in the world — and the most dangerous one to self-prescribe. Fatigue has many causes; low…

Protein and Satiety: The Weight-Management Starter Kit

Weight Management · October 11, 2026

Protein and Satiety: The Weight-Management Starter Kit

Weight management is a long game, and protein is the most evidence-backed dietary lever in it — not because it burns fat,…

Vitamin B12 on a Plant-Based Diet: The Non-Negotiable One

Nutritional Gaps · October 11, 2026

Vitamin B12 on a Plant-Based Diet: The Non-Negotiable One

Most nutrient gaps on plant-based diets can be managed with food choices. Vitamin B12 is the exception — reliable plant sources essentially…