CZ Optimization
Launch app
Writings

Notes from my practice.

Short, honest, evidence-tiered writing on the whole system. Most of it's free. The deeper biohacker pieces are a perk for Virtual Biohacker subscribers.

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9 pieces
COVER IMAGET1 · Proven

Creatine, honestly

The most studied compound in sport

One of the most studied compounds in sport — and why it is a true floor.

Mar 2026·6 min read
COVER IMAGET2 · Probable

Why I stopped chasing peak

Durability beats peak for almost everyone

The case for building a base instead of chasing a number.

Mar 2026·7 min read
COVER IMAGET2 · Probable

Reading your HRV without lying to yourself

A strong signal, easily misused

A practical, honest guide to what HRV can and cannot tell you.

Feb 2026·9 min read
COVER IMAGET1 · Proven

Sleep is the substrate

The floor under every other pillar

Why every other pillar underperforms when this one slips.

Feb 2026·10 min read
COVER IMAGET3 · PromisingSubscriber

Zone 2, beyond the hype

Promising, but the claims outran the data

Where the evidence actually stands on the longevity darling.

Jan 2026·14 min read
COVER IMAGET4 · ProvisionalSubscriber

Peptides & rapamycin: the honest frontier

High curiosity, honest uncertainty

What’s known, what isn’t, and how I think about the edge.

Jan 2026·18 min read
COVER IMAGET3 · Promising

The stone on my desk

On balance, ritual, and the cairn

A short piece on why the cairn became the mark of this practice.

Dec 2025·4 min read
COVER IMAGET2 · Probable

Protein targets that actually stick

The floor most people miss

The simplest way to hold a protein target you will actually keep.

Dec 2025·8 min read
COVER IMAGET4 · ProvisionalSubscriber

Modeling a TRT decision, honestly

Indication, evidence, tradeoffs

How I think about a TRT decision — with your doctor, not around them.

Nov 2025·16 min read
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In progress
The whole system, written down.
Chris Z · working title
The book · writing in progress

A book is taking shape.

The Balanced Longevity™ framework in full — four pillars, floors and flex, every recommendation evidence-tiered. It's early. Join the launch list and you'll hear first.

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Follow the build.

My new writing, my app, and my book — I release everything slowly and honestly. No noise.