The claim-to-evidence index

Check a health claim against human research.

See the current answer, exactly what was studied, where a claim overreaches, and what new evidence could change it.

586publications
206registered trials
198randomized trials
75research syntheses
9interventions
Claims recently assessed

Start with the words people actually use.

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Sauna and passive heat

Do saunas lower blood pressure?

Supported in some settings

Human studies suggest that sauna and other passive-heat protocols can reduce blood pressure in some populations, especially over short follow-up periods. The result …

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Sauna bathing

Do saunas increase longevity?

Association, not proof

Frequent sauna bathing has been associated with lower cardiovascular and all-cause mortality in observational research, but that does not prove sauna itself extends …

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Infrared sauna

Do infrared saunas lower blood pressure?

Limited direct evidence

Small human studies of infrared sauna or Waon therapy report blood-pressure and vascular changes in selected populations, but the direct evidence remains limited. Re…

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Infrared sauna

Do infrared saunas detoxify the body?

Not established

Sweating can contain trace substances, but the current indexed human literature does not establish that infrared sauna produces a clinically meaningful reduction in …

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Cold-water immersion

Does cold-water immersion reduce muscle soreness?

Supported for perceived soreness

Cold-water immersion has comparatively substantial human research support for reducing perceived muscle soreness after strenuous exercise. Effects on strength recove…

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Cold-water immersion

Do cold plunges increase testosterone?

Insufficient direct evidence

The current indexed human evidence does not establish that cold plunges produce a meaningful or durable increase in testosterone. Short-lived hormonal responses to s…

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01

Claim Fidelity

Does the cited research match the intervention, population, dose, duration and outcome in the claim?

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02

Trial Radar

Watch new, recruiting and recently completed trials before their findings become headlines.

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03

Evidence Changes

See newly indexed records, status changes, corrections and claim reassessments.

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Secondary product

How closely do your habits align with public-health guidance?

The Healthspan Habits Test remains a transparent, shareable habit-alignment exercise—not a biological-age test, diagnosis or lifespan prediction.

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Example result82/100

Every question links back to its guidance and evidence context.