Mostly Proven

Evidence checks

Fitness claims, checked against the studies.

One claim at a time. We put the evidence next to it and give a verdict, with sources you can open.

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How we check

  1. Claim

    We pick one claim, worded the way it circulates.

  2. Evidence

    We read the studies behind it and put the numbers next to the claim.

  3. Verdict

    We rate the claim on a five-step scale and say why it stops where it does.

Read how we choose sources and what the verdicts mean

The verdict scale

A verdict rates the claim as it circulates, never a person.

  • Proven

    Very well supported and consistent. Study design can separate the effect.

    Typical evidence: Several randomized trials or meta-analyses of trials that agree. Rarely given.

  • Mostly proven

    The core holds, but part of the claim goes beyond the data.

    Typical evidence: Consistent cohorts or trials, but dose, cause or group is still open.

  • Partly proven

    One part is supported, an important part is not.

    Typical evidence: Mixed findings, stand-in measures, observational data.

  • Not proven

    The claim has not been shown (yet).

    Typical evidence: No fitting study, or only mechanism or animal data.

  • Not true

    The claim contradicts the data.

    Typical evidence: Only with strong evidence against it. Very rare.

Follow along on Instagram.

New checks go up on Instagram first: a claim, the evidence, a verdict. One at a time.

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Questions, corrections, ideas: hello@mostlyproven.com