Shelf 01.1
Brain & Body pillar · HiPerformance Culture
Hormonal Optimization
Drive, stress and recovery are steered by chemical signals, and this section tracks the ones studied most: dopamine, testosterone and cortisol.
When those signals drift, motivation, mood and adaptation tend to suffer together. The library also weighs popular fixes such as ashwagandha against the published evidence before treating them as settled.
newest 24 Jul 2026
Most read here · Assessment
Hormonal Health Quiz: Which Hormones Are Limiting Your Performance? →
Editor's Pick · Hormonal Optimization
Dopamine: The Neuroscience of Motivation, Reward & the Drive System
Dopamine is not a pleasure chemical. The neuroscience of dopamine reveals a prediction error system that drives motivation, effort, and wanting. 33 sources reviewed.
Deep dive · 18 Jun 2026
A route through this shelf
Reading order
Measure yourself
Hormonal Health Quiz: Which Hormones Are Limiting Your Performance?Get a baseline before you change anything. 20 questions; scored on real dimensions.
Read the evidence
Dopamine: The Neuroscience of Motivation, Reward & the Drive SystemThe evidence in full, 48 references on the record.
Apply it
90-Day Hormonal Optimisation Protocol: Naturally Optimise Testosterone & CortisolA written method to run: 12 weeks.
Check the hype
Does Ashwagandha Lower Cortisol? The Evidence ReviewedAshwagandha measurably lowers serum cortisol; whether that means you will feel less stressed is genuinely contested.
The complete shelf, unpaginated
Holdings
Deep Dives
Long-form investigations with full bibliographies.
Dopamine: The Neuroscience of Motivation, Reward & the Drive SystemDopamine is not a pleasure chemical. The neuroscience of dopamine reveals a prediction error system that drives motivation, effort, and wanting. 33 sources reviewed.Deep dive · 18 Jun 2026
Testosterone: The Complete Science of the Body's Primary Performance HormoneThe complete science of testosterone, mechanisms, evidence hierarchy, and what 31 peer-reviewed studies reveal about the body's primary performance hormone.Deep dive · 18 Jun 2026
Cortisol: The Complete Science of Your Body's Primary Stress HormoneWhat cortisol actually does, why rhythm matters more than level, and what 36,823 people reveal about chronic stress. Evidence-ranked deep dive.Deep dive · 9 Apr 2026
Guides
Structured, chaptered field manuals.
Protocols
Multi-week programmes with a written method.
Assessments
Scored self-assessments with real question banks.Trend Breakdowns
Claims from the feed, checked against their sources.
Glossary
Defined terms, each with its own entry.- Adrenaline (Epinephrine)Adrenaline is the catecholamine hormone driving fight-or-flight. Understand how it works, what triggers it, and its effects on performance and health.
- BDNFBDNF drives neuronal survival, synaptic plasticity, and adult neurogenesis. A 29-study meta-analysis confirms aerobic exercise reliably raises it.
- CortisolCortisol is the body's primary stress hormone, produced by the adrenal cortex. Learn how it works, what chronic elevation does, and how to manage it.
- DHEADHEA is the body's most abundant steroid hormone and master precursor to sex hormones. Serum levels peak at 25 and fall 80-90% by the eighth decade.
- DopamineDopamine signals reward prediction errors, not pleasure. Understand the neuroscience behind motivation, wanting, and why addiction hijacks this system.
- EndorphinsEndorphins reduce pain and elevate mood via mu-opioid receptors. Understand their mechanism, release triggers, and why runner's high is contested.
- GABAGABA is the brain's primary inhibitory neurotransmitter. Definition, receptor mechanisms, and what the evidence shows about GABA supplementation.
- GhrelinGhrelin is the peptide hunger hormone that peaks before meals, rises with sleep loss, and drives intake. Definition, mechanism, and practical levers.
- GlutamateGlutamate, the brain's principal excitatory neurotransmitter, drives learning, memory, and LTP via NMDA and AMPA receptors. Excess causes excitotoxicity.
- Growth Hormone (HGH)Growth hormone (GH) is a pituitary polypeptide released mainly during sleep. It drives tissue repair via IGF-1 and declines after the third decade.
- HPA AxisThe HPA axis coordinates the stress response via a hypothalamus-pituitary-adrenal cascade. Chronic overactivation degrades cognition and immune defence.
- InsulinInsulin is a peptide hormone that coordinates blood glucose uptake and storage. Learn what it does, what insulin resistance is, and why exercise matters.
- LeptinLeptin is the adipocyte-derived hormone that signals satiety to the hypothalamus. Learn how it works, what leptin resistance means, and why sleep matters.
- NorepinephrineNorepinephrine is the brain's arousal and attention regulator. Definition, locus coeruleus mechanism, ADHD pharmacology, and performance applications.
- OestrogenOestrogen is a family of steroid hormones governing reproduction, bone density, and cognition. Covers its three active forms and hormone therapy evidence.
- OxytocinOxytocin is a neuropeptide hormone that co-ordinates social bonding and trust. Learn how it works in the brain and why 'love hormone' misleads.
- ProgesteroneProgesterone is the steroid hormone that prepares the uterine lining for pregnancy and drives deep sleep and mood stability via GABA-A receptors.
- SerotoninSerotonin is a neurotransmitter made mostly in the gut. Learn its real functions, why the chemical imbalance theory failed, and what the evidence shows.
- TestosteroneTestosterone is the principal androgen in the human body. It controls muscle mass, bone density, libido, and mood; only 2-3% is biologically active.
- Thyroid Hormones (T3, T4)Thyroid hormones T3 and T4 drive whole-body metabolism via the HPT axis. How hypo- and hyperthyroidism affect energy, weight, and performance.
Search Console, latest pull
Most read on this shelf
- Hormonal Health Quiz: Which Hormones Are Limiting Your Performance?Assessment
- Thyroid Hormones (T3, T4)Glossary term
- Does Ashwagandha Lower Cortisol? The Evidence ReviewedTrend breakdown
- Dopamine: The Neuroscience of Motivation, Reward & the Drive SystemDeep dive
- DHEAGlossary term