Knowledge base
Articles & protocols
Deep-dives into human optimization. Rigorous analysis of compounds, experimental protocols, and performance metrics translated from clinical data to actionable intelligence.
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Alpha-GPC Dosage: 300, 600, or 1,200 mg? Evidence Map
Alpha-GPC dosage by goal: 300-600 mg/day for cognitive enhancement, 600 mg pre-training for power output, 1,200 mg/day for vascular cognitive impairment.
Ashwagandha and L-Theanine: Stack for Stress + Focus
Ashwagandha + L-theanine stack: ashwagandha 300-600 mg/day for chronic stress, L-theanine 100-200 mg as needed for acute focus.
Best Longevity Supplements: Evidence-Tiered, Vendor-Agnostic
The longevity supplements with real human evidence: omega-3, vitamin D3+K2, magnesium glycinate, creatine. Tier-A foundation; Tier-B emerging.
Best Supplements for Men Over 40: Tier-Ranked Guide
Best supplements for men over 40: tier-A foundation (creatine, omega-3, vitamin D3+K2, magnesium), plus age-specific picks (CoQ10 if on statins, ashwagandha.
BPC-157 Dosage: Injection, Oral, Cycling Protocol
BPC-157 dosage protocols compared: 250-500 mcg/day subcutaneous (most-replicated preclinical), 500 mcg twice daily oral for gut-localized use, 4-6 week.
Average Grip Strength: Norms, Targets, How to Improve
Average grip strength by age and sex, with longevity-tier targets. Men 40-54: average ~110-130 lbs, longevity-optimal 145+.
How to Lengthen Telomeres: Diet, Exercise, What's Real
How to lengthen telomeres: lifestyle interventions (diet, exercise, stress reduction) have the strongest evidence (Ornish 2008).
How to Take Creatine Monohydrate: Dose, Timing, Loading
How to take creatine monohydrate: 5 g/day continuous, no cycling, optional 20 g/day loading. Timing barely matters. With or without food.
NSDR (Non-Sleep Deep Rest): Protocol, Evidence, Timing
NSDR (non-sleep deep rest) is the parasympathetic-shift practice popularized by Andrew Huberman, derived from yoga nidra.
NAC vs Glutathione: Which to Take, When to Stack
NAC vs glutathione: NAC is the cheaper, better-absorbed precursor; direct glutathione has bioavailability issues but works for specific cases.
NR vs NMN: Which NAD+ Precursor Wins, by Evidence
NR vs NMN: NR has the larger human safety database, NMN has the more recent commercial momentum. Plasma NAD+ rises consistently for both.
Urolithin A Side Effects: What the Trials Actually Show
Urolithin A side effects across human trials: clean safety record at 250-1000 mg/day. Mild GI upset most common. No liver, kidney, or cardiovascular signals.
AMPK Activators: Mechanism, Foods, Supplements, Exercise
AMPK is the cellular energy-sensor that triggers fat oxidation, autophagy, and mitochondrial biogenesis. What activates it, ranked by evidence: exercise.
Biohacking Supplements: What's Evidence-Backed and What's Hype
A vendor-agnostic guide to the biohacking supplements with real evidence. Ranked by tier, not by sponsorship. The honest list of what works for sleep.
Senolytic Supplements: What Works (and Who Should Skip)
Senolytic supplements promise to clear senescent cells. Which actually have human evidence: fisetin, quercetin + dasatinib, spermidine.
TUDCA Supplement: Benefits, Dosage, Side Effects, Evidence
TUDCA is a bile-acid conjugate with replicated effects on liver function, bile flow, and ER stress. What the human evidence supports for liver, ALS, insulin.
Animal vs Plant Protein for Muscle: What Beats Whey, and When
Animal vs plant protein for muscle building: whey wins gram-for-gram via leucine threshold and DIAAS.
Biomarker Quick Reference: 20 Common Lab Test Questions Answered
A one-screen quick reference for the most-Googled blood-test questions. Each question links to the deep biomarker article.
MCV and WBC Combined Reading: A Four-Quadrant Pattern Matrix
Read MCV and WBC together to resolve four clinical-pattern quadrants single-marker reading misses: B12 deficiency, iron deficiency, infection, and marrow.
Protein Intake by Age: Lifecycle Targets, Anabolic Resistance
Protein intake by age: anabolic resistance after 50 raises optimal protein from 0.8 to 1.2-1.6 g/kg/day.
Best Sleep Stack 2026: Magnesium, Apigenin, Glycine, Micro-Melatonin
A four-compound sleep stack: magnesium glycinate 200-400 mg, apigenin 50 mg, glycine 3 g, melatonin 0.3 mg.
Sleep Tracking Printable Template: 14-Day Diary, Wearable-Backed
A printable sleep diary template that captures what wearables miss: presleep mental load, mid-night wakes, dream recall, morning state.
Creatine Monohydrate Research Review: Meta-Analyses, Cognition
A living creatine monohydrate research review: mechanism of action, strength and cognition meta-analyses, aging RCTs, loading kinetics, safety.
Medicine 3.0 Framework: Proactive Healthspan, Without the Religion
The Medicine 3.0 framework tracks biomarkers in your 30s and 40s, treats risk before pathology, stacks lifestyle and tiered supplementation.
Creatine for Cognitive Function: 12-Week Self-Experiment Protocol
A 12-week n=1 creatine for cognitive function protocol: 5 g/day, anchored to Rae 2003, McMorris 2006 sleep deprivation, Avgerinos 2018 meta.
Longevity Biomarkers Doctors Don't Test: 12 Labs Beyond a Physical
Twelve longevity biomarkers skipped at annual physicals: apoB, Lp(a), fasting insulin, hs-CRP, DHEA-S, omega-3. What each measures, how to order blood tests.
Alkaline Phosphatase Blood Test: Normal ALP Range and Longevity Signal
Alkaline phosphatase blood test: 40-90 U/L is the longevity-optimal ALP range. Above 110 U/L raises all-cause mortality 1.5x post-MI.
Serum Albumin Blood Test: Normal Levels, Low Albumin Meaning
Serum albumin blood test: normal levels run 4.3 to 5.0 g/dL. Low readings flag inflammation, malnutrition, or liver and kidney disease.
Serum Creatinine Blood Test: Normal Range, eGFR, and Lifter Caveats
Serum creatinine blood test: normal range 0.6-1.2 mg/dL, when high creatinine signals kidney trouble, and why lifters and vegans need eGFR plus cystatin C.
Fasting Glucose Levels: Normal Range, Prediabetes Cutoff
Normal fasting glucose levels run 70-99 mg/dL; prediabetes starts at 100. Cardiovascular and PhenoAge risk climb above 85 mg/dL on a fasting blood test.
hs-CRP Blood Test: Reading Inflammation From a Single Number
hs-CRP blood test under 1.0 mg/L is optimal, 1 to 3 mg/L intermediate, over 3 high-risk. Confirm with two readings 4 weeks apart.
How to Read Medical Studies: Effect Size, Evidence Hierarchy, p-Values
How to read medical studies: spotting strong RCTs vs weak observational data, ranking evidence, and reading effect size before p-values.
Lymphocyte Percentage Blood Test: Normal Range, High, Low
Lymphocyte percentage blood test: 24 to 36 percent is optimal. Below 20 percent doubles mortality risk. Normal range, high, low, absolute count.
MCV Blood Test Meaning: Normal Range, High and Low Causes
MCV blood test meaning: 80 to 100 fL normal range, 85 to 92 fL longevity-optimal. High MCV flags B12 or folate deficiency; low MCV flags iron deficiency.
RDW Blood Test Meaning: Optimal Range, High RDW Causes, Mortality Risk
RDW blood test meaning: under 13.0% is optimal. Each point above 13 raises all-cause mortality roughly 14% in adults over 45.
WBC Blood Test Meaning: Optimal Count, Reference Range, Inflammation
WBC blood test meaning, optimal 4.5 to 6.5 x10^9/L band, standard reference range, and why high-normal counts at or above 8.0 raise mortality 1.5-2x.
CGM for Non Diabetics: Healthy Range and What the Normative Data Says
CGM for non diabetics: normal blood sugar ranges, healthy adult data from a 14-day trial, and what spikes are worth acting on.
Best Breathwork Protocols Ranked: Evidence by Method
Best breathwork protocols ranked: physiological sigh, box breathing, Wim Hof, 4-7-8. HRV and mood data, dose, duration, when to use each.
How Stress Accelerates Aging: Telomeres, Methylation, Reversal
How stress accelerates aging: chronic stress shortens telomeres, advances epigenetic clocks, raises inflammation. What reverses it.
Caffeine L-Theanine Stack: Ratio, Dosage, and Focus Effects
Caffeine L-theanine stack at 1:1, 100-200 mg each, is the best-evidenced acute focus pairing. Ratio, dosage, and when to skip it.
Cortisol Blood Test Meaning: Morning Levels, HPA Axis, and CAR
Cortisol blood test: morning cortisol, awakening response, 4-point salivary cortisol measure different things. Adrenal fatigue is not a diagnosis.
Creatine Monohydrate Supplement: Doses, Benefits, Side Effects
Creatine monohydrate supplement guide: 3-5 g/day saturates phosphocreatine stores, lifts anaerobic output 5-15%, supports lean mass and cognition under sleep.
Cold Exposure Protocols Ranked: Ice Bath, Plunge, Shower
Cold exposure protocols ranked by endpoint: ice bath for recovery, cold plunge for fat loss, cold shower for mood. Doses, durations, evidence.
Finasteride Side Effects: Hair Loss, DHT, and the Honest Trade-off
Finasteride side effects on libido and mood are real in a minority. DHT suppression drives hair and BPH benefit. Topical vs oral, PFS risk, decision framework.
The 2026 Fat Loss Protocol: Boring Beats Clever
A sequenced 16-week protocol for durable fat loss in healthy adults. Prioritizes lean mass retention, sleep, and behavior sustainability over thermogenic.
How to Form Habits: What the Science Actually Shows
How to form habits, evidence based: automaticity takes a median 66 days, not 21. Environment design and friction reduction beat motivation.
Intermittent Fasting Protocols Compared: TRE vs 5:2 vs Alternate-Day
Intermittent fasting protocols compared: time-restricted eating, 5:2, and alternate-day fasting produce similar weight loss when calories match.
HRV Guided Training: Morning Baseline, Recovery, Deload Decisions
HRV guided training works only if morning baseline data drives deload decisions. Oura, Garmin, Apple Watch readings on heart rate variability recovery.
How to Lower ApoB: Tier-Ranked Action Plan
ApoB beats LDL as a cardiovascular predictor. How to lower it ranked by effect size: diet, exercise, statins, PCSK9, bempedoic acid, and how long each takes.
Best Longevity Protocol 2026: Tier 1 First, Tier 3 Last
The best longevity protocol for healthspan extension: a tiered stack ranked by evidence, from Tier 1 essentials to Tier 3 experimental adds.
Male Fertility Testing: When to Check Sperm Count, What It Costs
Male fertility testing explained: when to check sperm count, what semen analysis costs, which lifestyle factors move the number, and TRT tradeoffs.
Circadian Rhythm Fasting: Meal Timing for Blood Sugar and Weight
Circadian rhythm fasting front-loads calories and ends eating 3h before bed. Early time restricted eating cuts glucose AUC and beats late meals on weight.
Metformin for Longevity: Evidence in Non-Diabetics and the TAME Trial
Metformin for longevity: what mice, diabetics, and the TAME trial show about lifespan extension in healthy non-diabetic adults.
EPA vs DHA Omega 3: Doses, Ratios, and What the Trials Show
EPA vs DHA omega 3: what each does, the REDUCE-IT and STRENGTH split, ratios that matter, and doses backed by trial data.
Sleep Tracker Anxiety: Orthosomnia and When Tracking Makes Sleep Worse
Sleep tracker anxiety, called orthosomnia, is a documented clinical pattern. Obsessing over sleep scores worsens insomnia. When to stop wearing the device.
Perimenopause Testing and Treatment: A Practical Field Guide
Perimenopause testing and treatment in 2026: signs in your 40s, hormone panels worth running, and where HRT and estradiol evidence sits.
Protein Quality: Animal vs Plant, Leucine, and DIAAS
Animal proteins have higher DIAAS scores and trigger muscle protein synthesis more efficiently. Plant-forward eaters need ~25-30% more total protein and.
Protein Targets for Longevity: How Much You Actually Need
1.6 g/kg/day is the meta-analyzed sweet spot for active adults; 2.0-2.2 g/kg for aging, cutting, or GLP-1 users. Why the mTOR-longevity argument against high.
Rapamycin for Longevity Protocol: Cycling Dosage Guide 2026
Rapamycin for longevity protocol options: weekly, cyclical, and transient pulse cycling dosage. Mechanistic rationale and 2026 evidence.
Minimum Effective Dose Weightlifting: Two 30-Minute Sessions a Week
Minimum effective dose weightlifting: two 30-minute sessions per week deliver most strength and hypertrophy gains of four-session programs. The protocol.
Sauna for Cardiovascular Health: Dose Response and Longevity Protocol
Finnish sauna study links 4-7 sessions weekly at 80C to lower cardiovascular mortality. Dose response, optimal temperature, and time per session.
Sleep Optimization Protocol: 8-Week Plan to Fix Broken Sleep
Sleep optimization protocol: an 8-week sequenced plan to fix broken sleep. Light, temperature, caffeine timing, magnesium glycinate, melatonin dosage.
Science Based Sleep Hygiene: Protocols Ranked by Effect Size
Science based sleep hygiene, ranked: temperature, caffeine cutoff, morning light, alcohol, supplements. Priority order with the numbers each lever moves.
Statins for Primary Prevention: Who Actually Benefits
Statins for primary prevention cut events in elevated-risk adults, less so at average risk. ApoB-led framework for the decision, side effects in context.
Vitamin D3 and K2 Stack: Dosage, Optimal Blood Levels
Vitamin D3 and K2 stack: dosage, optimal blood levels, when to take K2, deficiency symptoms, and what the VITAL trial actually showed.
Walking for Longevity: Steps, NEAT, Post-Meal Walks
Walking for longevity, decoded: 7,000-8,000 steps cuts all-cause mortality, 10,000 is a myth, post-meal walks blunt glucose spikes, NEAT compounds.
Best Sleep Tracker Comparison: Oura vs Whoop vs Apple Watch
Best sleep tracker comparison against polysomnography: Oura, Whoop, and Apple Watch all underestimate wake and overestimate light sleep.
How to Improve Healthspan: A Beginner's Guide to Longevity Basics
How to improve healthspan, not just lifespan. Healthspan vs lifespan, longevity basics, and the protocols that actually move the needle, ranked.
GLP-1 Weight Loss: Semaglutide and Tirzepatide Without the Muscle Loss
GLP-1 weight loss with semaglutide or tirzepatide is real and durable. Protect body composition with protein, resistance training, and dose pacing.
Hormone Changes With Age: Testosterone, Estrogen
Hormone changes with age: testosterone levels by decade, perimenopause testing, thyroid drift, cortisol shifts, and where HRT evidence sits.
Best Nootropic Stacks: Honest Guide for Daily Focus
Best nootropic stacks ranked honestly: caffeine plus L-theanine, racetams, and what to skip. How to stack nootropics for daily focus without the hype.
Workout Recovery Protocols: What the Evidence Supports
Science based workout recovery protocols ranked: sauna vs cold plunge, HRV guided training, sleep, peptides. What moves markers, what is placebo.
Understanding Sleep Architecture: Stages, Cycles
Understanding sleep architecture: N1 to N3 stages, REM cycles, sleep onset latency, and why wearable deep-sleep scores are rough proxies.
Welcome to BiologicalX: Evidence-Led Biohacking and Longevity
Vendor-agnostic, evidence-led human optimization: articles, calculators, vetted vendor reviews across sleep, cognition, metabolism, recovery, longevity.
Zone 2 and VO2 Max: The Two Fitness Markers That Predict Longevity
Zone 2 and VO2 max are the strongest fitness markers for longevity. How to train both, target heart rates, and weekly volume.
Health Data Tracking: Wearables, Lab Panels, and CGMs
Health data tracking for longevity: which wearables, annual lab panel markers, and continuous glucose monitors are worth the signal.