How Longevity Certified works

Science-screened. Community-voted.

Longevity Certified is the free community certification of Longevity Cities. Every certificate is earned in two stages: a science-based screening against the published criteria on this page, followed by a vote among eligible community members. This page is the single source of truth for how the seal is awarded, what it means, and how it can be lost.

Methodology version 1.0 · Last updated: June 10, 2026

What the seal means

The seal certifies honest conduct: claims that match the evidence, transparent business practices, and safe behavior toward customers in the categories we evaluate. It is awarded against published criteria, confirmed by a community vote, and re-checked over time.

What the seal does not mean

• It is not a medical endorsement and no statement about the effectiveness of any product, treatment or service.
• It is not proof that anything extends your life. We certify evidence honesty, never efficacy.
• It is not a paid placement. Certification cannot be bought, sponsored or accelerated with money.
• It is not a governmental or ISO-accredited certification. It is a community program with published rules.

Free of charge, by design

Applying is free. The certificate is free. The badge license is free. We take no commission, no sponsorship and no affiliate revenue from applicants, and being a partner of the platform gives no advantage in the process. This independence is the whole point of the seal.

The process

1. 1. Application

   A business applies with an extensive category-specific questionnaire. Self-praise does not score: claims need evidence the review can check, such as third-party test reports, registrations or published sources.

2. 2. Science screening (the traffic light)

   Answers are scored against the published criteria catalog. Knockout questions catch disqualifying practices, for example disease-cure marketing or pseudoscientific mechanism claims. One failed knockout means rejection regardless of all other answers. The score places the application in a green, yellow or red tier.

3. 3. Community vote

   Only green and yellow tier applications reach the community. Red tier applications never go to a vote. Eligible members vote during a fixed voting window; results are published as aggregates only.

4. 4. Final review

   After the vote, the team confirms the result. This final check looks at procedural integrity only, for example signs of vote manipulation. It is not used to overturn the community on substantive grounds.

5. 5. Award and monitoring

   Approved businesses receive a certificate with a fixed validity period, a public verification page and a badge license. We monitor badge use and review certificates when complaints or material changes arise.

Scoring and the traffic light

The questionnaire produces a score from 0 to 100. Knockout questions sit outside the score: failing one ends the application. The current thresholds are:

A high score cannot buy back a failed knockout. Disqualifying practices end the application no matter how good everything else looks.

Community voting rules

• One member, one vote. Votes are never weighted.
• Eligible are registered members with a verified email address and a complete profile whose account already existed when the vote started.
• A vote runs for 14 days by default.
• At least 5 valid votes are required. Below that, the application is not decided and can be re-run.
• An application needs at least 70% approval from the community. Below 50% approval, the community result is a binding rejection.
• Individual votes are secret. Only aggregate results are published.
• Applicants must not solicit or incentivise votes. Vote canvassing disqualifies the application.
• People with a direct stake in the applicant, for example owners or employees, must not vote on that application.

Validity, re-checks and revocation

Certificates are valid for a fixed period shown on each verification page. Certified businesses confirm annually that the certified facts still hold, and we re-review when complaints, recalls, regulator action or changed marketing claims give reason to.

A certificate is revoked when

• the application contained false or misleading information,
• the certified business starts making claims that would have failed the screening,
• the badge is misused, for example displayed in contexts implying an endorsement we did not give,
• vote manipulation is discovered after the award.

Badge use

• The badge always links to the verification page, which links back to these published criteria.
• Food and supplement businesses may reference the certification at company level only. The badge must not appear on product packaging or in product-specific advertising.
• The badge license ends automatically when the certificate expires or is revoked.

Complaints and corrections

If you believe a certified business does not meet these criteria, or a decision was procedurally flawed, contact us. Substantive complaints trigger a review of the certificate.