Longevity, fact-checked

Three L’s.
One check.

The mark is a single L, turned until it becomes a tick. Everything else follows from that gesture: the highlighter pen, the ultraviolet ink, the annotated photography.

L → rotate(−45°) → ✓

The Check-L

A logo that is also a verdict.

longlifelistlonglifelistPrimary lockup

longlifelistOn ultraviolet

App icon · tile · favicon

Verified seal · embedsVerified by longlifelist

The pill seal is the only fully rounded shape in the system — reserved for verification.

RulesTile ratio — corner radius is 22% of the tile.Two pairings only — violet on pollen, pollen on violet.Wordmark is always lowercase, never split.Never use a grade colour in the mark.

Colour

Ultraviolet ink. Pollen highlighter. Lilac mist.

No health brand owns violet + chartreuse. Neither collides with the evidence grades, so colour still means evidence when it appears on a stamp.

Ultraviolet

Subtle
Muted
Primary
Strong
On dark

#4B2BEE primary · #3419C4 strong · #E7E2FD subtle · #A898FF on dark · white text 7.3:1

Pollen

#DDF75B
Background only — never text.
Ink on pollen 14.9:1

Nightshade

#16121D · #201A29 · #352E40

Mist

#F0EEF4 · #FAF9FC · #E6E3EC

Evidence grade: Strong evidence
Evidence grade: Moderate evidence
Evidence grade: Limited evidence
Evidence grade: Weak evidence
Evidence grade: No credible evidence
Evidence grade: Evidence of harm
Evidence grade: Insufficient evidence

Evidence grades are semantic, not brand — they never appear in the mark.

The highlighter

We mark what holds up.

Pollen is applied like a fact-checker’s highlighter: behind the one phrase the evidence supports. One highlight per view. Never on a claim we haven’t graded A or B.

Creatine is sold as an anti-ageing supplement. In 22 trials, it did one thing reliably: Supported: it helped adults over 50 build muscle when they also lifted. ~~Not supported: It reverses cellular ageing.~~

SupportedStruck — not supported

Imagery: annotated duotone

Real people, measured — never glowing.

Unretouched documentary photos, pushed to an ultraviolet → pollen duotone, then annotated like a study figure: thin frames, mono labels, one measurement.

GRIP STRENGTH · 38 kg

FIG. 1

HbA1c · 5.4 %

FIBRE · 31 g / DAY

Do — real ages, real bodies, gyms, kitchens, clinics, lab benches.
Do — one annotation per image, with a real unit.
Don’t — glowing skin, pills on marble, DNA helixes, lab-coat stock smiles.
Don’t — duotone clinician portraits on reviewer pages; those stay full colour for trust.

Type

Display · 450–700

Bricolage Grotesque

Warm, slightly quirky grotesque — human, not clinical. Tight tracking at size.

Interface · 400–600

Geist

Everything functional — nav, forms, tables, body copy.

Data · 400–600

Geist Mono

Grades, values, units, citations, annotations.

The scale

display-2xl Bricolage · fluid · 0.95 · -0.055em · 680: Does it actually work?
display-lg Bricolage · fluid · 1 · -0.03em · 680: Longevity clinics in Lisbon
display-md Bricolage · 3.25rem · 1 · -0.03em · 680: Good morning, Priya.
heading-xl Bricolage · 2.75rem · 1.05 · -0.02em · 620: Enough to act on.
heading-lg Bricolage · 2.25rem · 1.1 · -0.02em · 620: Research Radar
heading-md Bricolage · 1.625rem · 1.2 · -0.02em · 620: How we grade
heading-sm Bricolage · 1.5rem · 1.25 · -0.03em · 620: Blood pressure · 30 days
title-lg Bricolage · 1.75rem · 1.2 · -0.02em · 560: Down 18% since you started lifting.
title-md Bricolage · 1.375rem · 1.3 · -0.02em · 560: Clínica Tempo, Lisbon
title-sm Bricolage · 1.25rem · 1.25 · -0.02em · 560: “Creatine preserves muscle after 50”
lede Bricolage · 1.625rem · 1.35 · -0.02em · 450: Small, reliable gains in muscle after 50 — if you’re also lifting.
quote Bricolage · 1.625rem · 1.35 · -0.02em · 560: “It is not a longevity drug — it is a training aid.”
body-xl Geist · 1.1875rem · 1.55 · 0em · 400: Every intervention carries an evidence grade and the studies behind it.
body-lg Geist · 1.125rem · 1.7 · 0em · 400: In adults over 50, 3–5 g a day alongside resistance training produced small gains.
body Geist · 1rem · 1.6 · 0em · 400: Clinics can’t edit grades, and they can’t delete reviews.
body-sm Geist · 0.875rem · 1.5 · 0em · 400: Reviewed by a board of 38 named clinicians.
caption Geist · 0.8125rem · 1.5 · 0em · 400: Source: Withings cuff (patient-owned) · 41 readings
eyebrow Geist Mono · 0.75rem · 1.4 · 0.08em · 400: Strongest evidence right now
label Geist Mono · 0.6875rem · 1.4 · 0.06em · 400: Grade for lean muscle mass
data-xl Geist Mono · 2.5rem · 1 · -0.045em · 400: 41.2
data-md Geist Mono · 1.625rem · 1.1 · -0.045em · 400: 1,208
data Geist Mono · 0.8125rem · 1.5 · 0em · 400: Score 86/100 · 41 studies · 22 RCTs

Shape — 18px cards, 10px controls, 6px chips. Softer than v1, still structured.

Depth — flat on Mist; a single soft shadow only for sheets and menus.

Stamps — grade stamps stay square-ish (6px) so they read as marks, not buttons.

Controls

One primary action, in ink.

Pollen is the one action on a Nightshade panel.

RCT · n=4,812ADDEDPEER-REVIEWEDPREPRINTSYNC FAILED30DVerified by longlifelist

Three L’s.One check.