The Codex
What everyone knows, but few say plainly
A small library of enduring principles — filtered by the weight of evidence, not by what anyone has paid to say. Read by the domain that interests you. Use it in your own way.
- 01
Regularity beats duration.
A consistent sleep and wake time anchors nearly every downstream system more reliably than chasing a target number of hours. The rhythm is the medicine; the total is secondary.
Sleep
- 02
The day sets the night.
Deep sleep is earned long before bedtime. Morning light and daytime movement are the inputs that let the body fall — and stay — in the depths after dark.
Sleep
- 03
An aerobic base is bought slowly and kept for life.
Easy, conversational Zone-2 cardio is among the most durable trainable levers in longevity. It compounds quietly over years and asks little of you on any single day.
Movement
- 04
Strength is the rent you pay on your future.
Resistance training, paired with adequate protein, defends the muscle that in turn defends healthspan. Power and lean mass lost late in life are far harder to reclaim than to keep.
Movement
- 05
The body keeps the bill for sitting.
Long stillness carries a metabolic cost that accrues silently through the day. Frequent light movement — brief walks, simple movement snacks — offsets much of it without a formal workout.
Movement
- 06
Protein is the floor, not the ceiling.
Adequate daily protein preserves muscle as the years compound, especially when training and ageing both raise the demand. Meet the floor first; refine everything else after.
Nutrition
- 07
A steady window calms the metabolism.
A consistent daily eating window — rather than grazing at all hours — supports metabolic flexibility and aligns fuelling with the body's own clock. Consistency matters more than severity.
Nutrition
- 08
Most damage hides in the oil.
Much of the modern dietary tax is paid quietly through ultraprocessed foods and industrial seed oils. Minimising that load removes a daily, low-grade inflammatory burden most never notice.
Nutrition
- 09
Connection is the strongest signal in the longest study.
Across decades of longitudinal research, the quality of close relationships predicts late-life health better than almost any single lab value. Belonging is not soft; it is biology.
Mind
- 10
Stress is the silent accelerant.
Chronically unmanaged stress does not stay in the mind — it surfaces in how the body ages. Left unattended, it quietly raises the cost of everything else you do well.
Mind
- 11
Awe lengthens the moment.
Time in nature and experiences of awe are associated with measurably lower inflammatory load. The mind's sense of spaciousness leaves a real, physiological trace.
Mind
- 12
Light is a drug taken through the eyes.
Bright days and genuinely dark nights act as dosing instructions for the whole body's clock. Getting the light right is one of the most powerful, least costly interventions available.
Environment
- 13
What you breathe, drink, and sleep in compounds.
The quality of your air, water and sleeping environment works slowly but relentlessly. None of it is dramatic on any given night; all of it accumulates across a lifetime.
Environment
- 14
You cannot bend a curve you cannot see.
A measured baseline of key biomarkers turns vague intentions into direction. Without numbers you are guessing; with them, you can aim — and verify that you are moving.
Measurement
- 15
Trends beat snapshots.
A single reading is mostly noise. The slope of a marker over time is the signal — it reveals whether a change is working long before any one result can tell you.
Measurement