Neo Steinhoff

Writing

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Notes on building, exiting, and compounding.

Occasional writing on the ventures, the products, and the capital — from someone running all three at once. Looking for something to work through end to end instead? See the courses.

4 min1HealthBiomarkersLongevityProtocol

What a Blood Panel Actually Tells You

A lab reference range describes the population that walked into the lab, and that population is not healthy. Here's how to read a standard panel, which numbers matter, and the one test you only need once in your life that almost nobody gets.

4 minHealthMethodProtocolEpistemics

Measurement Without a Decision Is a Hobby

More data makes the signal-to-noise problem worse, not better, unless the analysis accounts for it. A counterweight to my own tracking article, and the rule that decides whether a metric earns its place.

3 min1TrainingMechanismEnduranceProtocol

One Kinase, Two Answers

Endurance training and hypertrophy don't merely compete for time. They send opposing instructions to the same signalling node, and the conflict has a name: AMPK. Here's what it actually does, how big the effect is, and how to schedule around it.

4 minTrainingHypertrophyBiomechanicsProtocol

The Exercise You're Doing Isn't the One You Think

Every exercise has a point where it's hardest, and every muscle has a length where it grows best. Where those overlap determines what you're actually training — which is why some staple exercises quietly fail at the job they're assigned.

3 min1ToolsTrainingProtocolNutrition

A Spreadsheet That Still Works in Ten Years

Training log with automatic 1RM estimation, daily weight with a 7-day rolling average, macro targets that compute from your bodyweight and phase, and strength benchmarks that scale as you do. Free, no signup, and it will still open in a decade.

4 minNutritionTrainingProtocolBody Composition

The Rate Is the Decision

Muscle accretion has a hard ceiling of roughly 0.25–0.5% of bodyweight per month, and no surplus makes it faster. Everything above that is fat. Here's the arithmetic on bulking, cutting, and the small-surplus approach that quietly beats both.

5 minTrainingHypertrophyProtocolNutrition

If Only the Gym Mattered

What the ceiling actually looks like when growth is the only objective: the per-session volume ceiling, why weekly volume is meaningless without frequency, the movement list chosen by resistance profile rather than tradition, and an honest account of what you give up to run it.

3 minHealthBiomarkersLongevityProtocol

Your Lab Range Is Not a Target

Normal fasting glucose runs to 99 mg/dL, and the mortality curve starts bending well before that. The gap between 'normal' and 'optimal' is where most preventable disease lives — plus the one test almost nobody orders that you only need once in your life.

4 minProtocolHealthMinimalism

Nine Things

A maximal protocol run at 60% adherence loses to a minimal one run at 95%, because almost everything here is dose-over-time rather than dose-per-session. So here is the ruthless version — nine levers, roughly an hour a day, and an honest account of what got cut.

3 minTrainingLongevityCardioProtocol

The Number That Predicts Everything

Cardiorespiratory fitness has the largest effect size of any modifiable variable in medicine, with no observed upper limit. Here's what the number is actually measuring, and why Zone 2 alone will not move it.

4 minSleepNeuroscienceMechanismProtocol

Sleep Is Plumbing

For a decade the glymphatic system was a mouse story. A 2026 randomised crossover trial made it a human one, linking sleep-stage physiology directly to the clearance of amyloid-beta and tau. Here's the actual mechanism, and why regularity beats duration.

10 minResearchMethodPrompts

The Life-Maximization Digest Prompt

The prompt that generates the quarterly digest, published in full. Includes the two-axis evidence/source rubric, the 'well-known is not weak' calibration, the hard safety line on unregulated compounds, and the three parts added in v2 — failure ledger, cost/risk ranking, and an adversarial pass.

76 min1LongevityResearchHealthDigest

Life-Maximization Digest — Q3 2026

Fourteen parts, ~15,000 words: what actually moved in age-extension research this quarter, what got refuted, and what any of it changes in practice. Every claim carries an evidence tier and a source tier, and the two are held separate on purpose.

10 min2ResearchMethodEpistemics

Finding the Real Experts

The most-viewed source in almost any domain is, structurally, not the most reliable one. A six-tier filter for finding the people the popularisers are quietly reading — plus the calibration that stops it turning into contrarianism.

4 minRosterProductBuilding

Four thousand contacts and no idea who mattered

I had 4,000 connections from one platform alone and was quietly letting the twenty relationships that mattered decay. Every tool I tried was built for sales pipelines. So I built the other thing.

5 minVeridianAIEdTechBuilding

Four million words, and the part that isn't the model

Veridian marks Pearson IAL Economics and Business papers end to end. The marking harness took weeks. The 4-million-word knowledge base underneath it took months, and it's the only reason the thing works.

4 minMisogiHardeningProtocol

One brutal thing a year, done in the wrong order

Once a year I do something with a genuine chance of failure. The current version is an ultra Ironman in reverse order, and the reversal is not a gimmick — it's the entire mechanism.

4 minEssaysJudgementRevisiting

I wrote that actions matter more than interpretations. I was half right.

At fourteen I argued that you should judge people by what they do, not by how you read them. I still think that's mostly true. The part I got wrong has cost me more than the part I got right has earned.

4 minAgencyPricingOperating

A five-figure invoice bought a Rolex. The invoice was the achievement.

Acro Studios has served 17 clients at a four-figure average ticket. One engagement was multiple five figures — enough to buy a platinum Day-Date. What changed between client one and that one had nothing to do with the code.

5 minFoundersMentoringOperating

Thirty-four founders, and the one thing that predicted who made it

I've mentored 34 young founders and run an eight-person incubator. The variable that separated the ones who shipped from the ones who didn't was not the one I expected, and it isn't the one that gets written about.

5 minEducationLearningHomeschooling

I built my own curriculum. Here's what school was actually for.

I study Economics, Mathematics and Business on a curriculum I wrote myself. The subjects were the easy part. The hard part was discovering which parts of school I had been quietly relying on.

5 minProtocolSystemsPerformance

The protocol is not about looking good

Seven pillars, ordered on purpose, with the body first. Not because the body matters most, but because everything else runs on it — and I only found that out by getting the order wrong first.

14 minResearchLearningEducationEdTech

How people actually learn: the evidence, the effect sizes, and what to build

Deep research behind the courses. What the meta-analyses actually say, where they disagree, which popular techniques have no evidence at all, and a ranked build list ordered by evidence strength divided by cost.

7 minEducationLearningResearchEdTech

Everything that feels like studying isn't

The study methods that work feel worse than the ones that don't. That single fact breaks the feedback loop every self-taught student is relying on — including mine.

9 minWritingClaudeToolsCraft

The Sound of Machine Writing

Machine prose isn't wrong, it's even: the same sentence length, the same rhetorical move every paragraph, a hedge before every claim. Here are the tells ranked by how much they give you away, the one fix that improves the writing rather than disguising it, and the full skill file.

9 min1ToolsClaudeResearchMethodEpistemics

A Claude Skill That Filters Out the Popularisers

A markdown file that makes Claude check who a claim came from before repeating it. Six tiers, a six-point disqualification pass, and two calibrations that stop it from quietly turning into contrarianism. Copy it, save it, done.

3 minTrainingHypertrophyProtocol

Training to Failure Is a Tax You Sometimes Should Pay

The last five reps before failure are the only ones that reliably stimulate growth — which makes proximity to failure the most important variable in a set. It also makes going beyond failure expensive in a currency most people never account for.

4 minTrainingHypertrophyMechanismProtocol

Two Sets Is Enough

A muscle fibre grows when it is recruited and under high tension at the same instant. That single requirement explains why a set of 20 and a set of 6 produce the same growth, why the fourth set of an exercise is nearly wasted, and why frequency beats volume.

7 minResearchFoundersUniversity Admissions

Where Founders Actually Come From

The three most-cited entrepreneurship-school rankings disagree so completely that at least two of them have to be measuring something other than what they claim. Here's what's underneath them.

19 minResearchUniversity AdmissionsFounders

The Best Universities in the World for Undergraduate Entrepreneurship

The full research behind 'Where Founders Actually Come From' — a school-by-school breakdown of capital access, accelerator selectivity, leave policies, co-founder density, admissions reality, and the alternatives worth weighing against a degree.

5 minVenturesExits

Building and exiting CASA before I could vote

How a teen-events brand went from me promoting other people's parties to 25+ events across three cities — and why I sold it the moment the mission was done.

4 minProductsAIEdTech

Veridian: turning 4M words into an A* on my own exam

I built an AI examiner because the resources for Pearson IAL Economics & Business weren't good enough for the grade I wanted — then sold it to two schools and 70 students.

3 min1CapitalInvesting

Compounding a family portfolio from AED 3M to 16M+

Notes on growing capital the boring way — real-estate debt, house-flips, selective speculation — while everything else I build stays operator-led.

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