Human performance research

The science of staying prime.

Every article reviewed against current peer-reviewed research. Practical, evidence-graded, written for men who refuse to coast.

The editorial voice. Evidence-graded, hedged where the data is thin, specific where it's not. No motivational filler, no “ultimate guide” framing, no rhetorical pep. Every claim earns its place with a study, a mechanism, or an honest “we don't know yet.” If a trial was n=20 in mice, we say so. If the effect size is small but real, we say that too.

Seven topic clusters. Sleep (architecture, sleepmaxxing, circadian alignment). Recovery (HRV, cold, heat, deload). Hormones (testosterone, cortisol, thyroid, TRT). Longevity (biological age, ApoB, VO2 max). Cognition (focus, neuroprotection, dopamine). Peptides and supplements (dose, mechanism, evidence grade). Each piece links into the relevant biomarker and protocol pages.

What makes a good performance article. Four parts: mechanism (what the intervention actually does), dose (form, amount, timing — not just “take some”), caveat (in whom, for how long, with what limits), and when it fails (the people for whom it won't work, or the conditions that blunt the effect). If a piece can't answer all four, it's not ready to publish.

How to use the archive. Start with the foundational pieces — sleep, testosterone, biological age — then drill into the topic that maps to your current bottleneck. Each post lists related reading, the biomarkers it touches, and the protocols where it shows up. Treat this as a working library, not a feed: the best articles are the ones you come back to twice.

Featured · hormones

How One Week of Poor Sleep Reduces Testosterone by 15%

Sleep and testosterone are directly linked. A 2011 University of Chicago study showed 5 hours of sleep reduced T by 10–15% in just one week.

6 min read · Updated 2026-05-18
89 of 89 articles
longevity
Biological age vs chronological age: why it matters
7 min read · 2026-05-18
recovery
HRV Training: How to Use Heart Rate Variability to Never Overtrain Again
8 min read · 2026-05-18
recovery
Cortisol is killing your gains: how to manage it
7 min read · 2026-05-18
longevity
VO2 max: the strongest predictor of how long you'll live
7 min read · 2026-05-18
hormones
Cold Exposure and Testosterone: What the Research Actually Shows
5 min read · 2026-05-18
sleep
The sleep stack: 7 supplements that actually work
6 min read · 2026-05-18
longevity
ApoB: Why This Cholesterol Marker Matters More Than LDL for Your Longevity
6 min read · 2026-05-18
performance
Creatine: 7 benefits beyond muscle building
7 min read · 2026-05-18
sleep
Sleepmaxxing: The 2026 Sleep Optimization Protocol for High Performers
8 min read · 2026-05-18
sleep
Magnesium Glycinate for Sleep: Mechanism, Dose, and What Research Shows
6 min read · 2026-05-19
sleep
Apigenin and Sleep: The Chamomile Flavonoid Behind Bryan Johnson's Stack
5 min read · 2026-05-19
longevity
NMN vs NR: Which NAD+ Precursor Actually Works in 2026?
6 min read · 2026-05-19
longevity
NAD+ Supplements in 2026: What Research Shows vs What Influencers Claim
7 min read · 2026-05-19
cognition
The Caffeine + L-Theanine Stack: Mechanism, Ratio, and Optimal Use
6 min read · 2026-05-19
longevity
The Bryan Johnson Blueprint Protocol: What Holds Up Under Scrutiny
7 min read · 2026-05-19
longevity
How to Lower ApoB Naturally: Diet, Exercise, and Supplements That Work
6 min read · 2026-05-19
longevity
How to Reduce Biological Age: 5 Levers That Compound Over 12 Months
7 min read · 2026-05-19
longevity
DEXA Scan Cost in 2026: Where to Get One and Whether It's Worth It
7 min read · 2026-05-19
longevity
Epigenetic Age Tests Compared: Horvath, GrimAge, PhenoAge Explained
8 min read · 2026-05-19
recovery
Contrast Therapy: Heat, Cold, and the Vascular Pump for Recovery
6 min read · 2026-05-19
peptides
Recovery Peptides 2026: BPC-157, TB-500, and What the Evidence Says
7 min read · 2026-05-19
cognition
Modafinil Alternatives in 2026: Legal Nootropics That Actually Work
7 min read · 2026-05-19
performance
Hybrid Athlete Training: Strength and Endurance Without Compromise
7 min read · 2026-05-19
performance
The Norwegian 4x4 Protocol: 28 Minutes to Build VO2 Max Faster
8 min read · 2026-05-19
peptides
KPV Peptide: The Tripeptide Quietly Beating SSRIs for Gut Inflammation
13 min read · 2026-05-19
peptides
The KLOW peptide stack: decoded component by component
13 min read · 2026-05-19
peptides
GHK-Cu Peptide: The Therapeutic Copper Compound Beyond Skincare
13 min read · 2026-05-19
peptides
Tirzepatide: how the GLP-1/GIP dual agonist works
14 min read · 2026-05-28
peptides
Cagrilintide: The Amylin Analog Quietly Reshaping Obesity Treatment
16 min read · 2026-06-02
peptides
AOD-9604: The Fragment 176-191 Fat-Loss Peptide Explained
13 min read · 2026-05-18
peptides
Peptides for Healing: The 2026 Evidence Map (Tendon, Skin, Gut, CNS)
13 min read · 2026-05-18
peptides
Retatrutide: The Triple-Agonist Peptide Poised to Outclass Tirzepatide
13 min read · 2026-05-18
longevity
SS-31 (Elamipretide): the mitochondria-targeted peptide
13 min read · 2026-05-18
peptides
Peptides for Men: The 8-Peptide Performance & Longevity Stack
14 min read · 2026-05-18
peptides
The Wolverine Peptide Stack: BPC-157 + TB-500 + GHK-Cu Recovery Protocol
13 min read · 2026-05-19
cognition
Dihexa: the synapse-forming peptide more potent than BDNF
12 min read · 2026-05-19
cognition
Semax Peptide: The Russian Nootropic for Focus, Stroke Recovery, and BDNF
13 min read · 2026-05-19
cognition
Selank: The Russian Anxiolytic Peptide That Doesn't Sedate
13 min read · 2026-05-19
peptides
Tesofensine: The Triple Monoamine Reuptake Inhibitor for Stubborn Fat Loss
13 min read · 2026-05-19
nutrition
DAO Supplement: Diamine Oxidase for Histamine Intolerance Decoded
13 min read · 2026-05-18
nutrition
Natural GLP-1 supplements: what actually mimics semaglutide
13 min read · 2026-05-18
nutrition
Vitamins A, B, C, D, E: The Honest Guide to the Big-Five Stack
13 min read · 2026-05-18
peptides
Oral Peptide Supplements: What Survives Digestion (and What Doesn't)
13 min read · 2026-05-18
nutrition
EAA vs BCAA Supplements: When Essentials Beat the Branch-Chains
13 min read · 2026-05-18
longevity
Citrus Bergamot: The Polyphenol That Lowers ApoB Without a Statin
13 min read · 2026-05-19
longevity
Mitochondrial supplements: PQQ, CoQ10, NMN, and the stack
13 min read · 2026-05-19
longevity
Joe Rogan's supplement stack: what he actually takes
13 min read · 2026-05-19
cognition
Blue Cannatine: Decoding the Nicotine + Caffeine + Theanine Nootropic Stack
13 min read · 2026-05-19
nutrition
Best ashwagandha supplements 2026: KSM-66 vs Sensoril
13 min read · 2026-05-19
peptides
Are peptides legal in 2026? FDA rules decoded
15 min read · 2026-05-19
peptides
How to Reconstitute Peptides: The Step-by-Step Without Wasting a $500 Vial
14 min read · 2026-05-19
hormones
Peptides for Libido: PT-141, Kisspeptin, and the Honest Picture for Men 35+
14 min read · 2026-05-19
hormones
Peptides for ED: When PT-141 Outperforms Sildenafil (and When It Doesn't)
13 min read · 2026-05-19
peptides
Peptide therapy cost in 2026: what clinics actually charge
13 min read · 2026-05-19
nutrition
Beef liver supplements: benefits, risks, and dosing
13 min read · 2026-05-18
nutrition
Methylfolate (5-MTHF) for MTHFR mutations: a guide
13 min read · 2026-05-18
longevity
How to Lower Fasting Glucose Without Medication: The 8-Lever Protocol
14 min read · 2026-05-18
nutrition
Omega-3 EPA + DHA: the dosing most people miss
13 min read · 2026-05-18
peptides
Sermorelin: the GHRH analog that restores GH pulses
14 min read · 2026-05-18
sleep
Optimal sleeping temperature: the 65–68°F rule for deep sleep
7 min read · 2026-05-19
longevity
Biological age calculator: what it measures, what it doesn't
7 min read · 2026-05-19
testosterone
Optimal testosterone levels by age: a reference guide for men 25–55
8 min read · 2026-05-19
longevity
Biological age test: which one to take and how to read it
7 min read · 2026-05-19
longevity
Biological age testing methods: methylation vs blood vs functional
7 min read · 2026-05-19
longevity
Biological age news: the research that actually changed the field in 2026
7 min read · 2026-05-19
longevity
Biological age blood test: what PhenoAge measures and how to read it
7 min read · 2026-05-19
sleep
Optimal sleep time: when to sleep and how long, by age
5 min read · 2026-05-20
sleep
Optimal sleep temperature: lab evidence for the 65–68°F window
5 min read · 2026-05-20
testosterone
Optimal testosterone levels by age: reading the lab range correctly
6 min read · 2026-05-20
testosterone
Testosterone optimization without TRT: natural methods that move the number
7 min read · 2026-05-20
recovery
Recovery protocol for athletes: a periodized framework
6 min read · 2026-05-20
recovery
HRV training zones explained: a practical guide
5 min read · 2026-05-20
longevity
Longevity biomarkers panel: what to test, what to skip
6 min read · 2026-05-20
longevity
VO2 max and mortality: the Mandsager study, deconstructed
7 min read · 2026-05-20
performance
Skinny fat strength training: why cardio and dieting fails
9 min read · 2026-05-20
performance
Hybrid athlete training program: a 4-day split that works
8 min read · 2026-05-20
performance
Hybrid strength training: the mechanism and when it works
8 min read · 2026-05-20
performance
Strength training for men over 40: hormones and volume tradeoffs
9 min read · 2026-05-20
performance
Kettlebell strength training: programming for 3x weekly
6 min read · 2026-05-20
performance
Wrestling strength training: neck, grip, and competition cycles
7 min read · 2026-05-20
performance
Vertical jump strength training: RFD beats max strength
6 min read · 2026-05-20
performance
Hypertrophy vs strength training: the intensity-volume tradeoff
7 min read · 2026-05-20
peptides
GHK-Cu Peptide: The Therapeutic Copper Compound That Goes Far Beyond Skincare
11 min read · 2026-05-26
nutrition
Natural GLP-1 Supplements: What Actually Mimics Semaglutide (and What Doesn't)
14 min read · 2026-06-04
performance
Zone 2 Training: The Mitochondrial Protocol That Predicts Long-Term Health
14 min read · 2026-06-09
testosterone
Foods That Boost Testosterone: A Nutrition Guide Backed by Science
15 min read · 2026-06-16
testosterone
Shilajit Benefits for Men: Testosterone, Energy and What the Research Shows
12 min read · 2026-06-30
hormones
Magnesium and Testosterone: The Deficiency 45% of Men Don't Know They Have
13 min read · 2026-07-02
cognition
Brain Fog Test: Identify Your Root Cause and Fix It With Protocols
13 min read · 2026-07-07
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