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Field notes from the frontier of healthspan science — sleep, biological age, training, nutrition, and the protocols that actually move the needle.

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Featured · Biological Age

Facial Analysis: What AI Can Actually Read From Your Face

A single photo holds more health information than a clipboard. How AI facial analysis measures skin, symmetry, and aging, what it reveals about your health and appearance — and how to get assessed free.

Aug 29, 202612 min read

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Face Age Test: How Old Does Your Face Really Look?

Face age tests are everywhere — and the science underneath them is real. How AI estimates your perceived age, why looking older than your years predicts health outcomes, and how to measure the aging that actually matters.

Aug 27, 202611 min read

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AI Longevity: How AI-Powered Longevity Intelligence Actually Works

Wearables, labs and habit apps produce data; almost none of it changes behavior. Here's what AI-powered longevity intelligence really does — aggregate, estimate, rank, prescribe — and what it can't do.

Aug 5, 202613 min read

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Health Risk Assessment: What It Measures and How to Take One Free

Used properly, a health risk assessment is the fastest way to find the two habits costing you the most years. What it measures, how to read the domain scores, and how to turn the result into a 12-week plan.

Aug 2, 202613 min read

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Biological Age Calculator: How It Works and How to Get Yours Free

Your birth certificate measures time; a biological age calculator measures wear. What goes into the number, how lifestyle, blood and epigenetic methods compare, and how to get a credible estimate in three minutes.

Jul 30, 202612 min read

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Magnesium Glycinate vs Citrate: Which One to Take

The two most popular forms of magnesium aren't interchangeable. Glycinate for sleep, anxiety, and daily use. Citrate for constipation. Here's the human evidence and a 10-second rule for picking.

Jul 9, 202612 min read

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Creatine Benefits for Women: What the Evidence Actually Shows

For 30 years creatine was marketed to male lifters. The last decade of research has quietly made it one of the best-supported supplements for women — strength, cognition, bone, and healthy aging, without the bulk.

Jul 8, 202613 min read

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Taurine Benefits: What the Human Evidence Actually Shows

Taurine went from energy-drink filler to one of the most-studied longevity molecules of the decade. Here's what the human trials prove — heart, mitochondria, metabolism, aging — and how to dose it.

Jul 6, 202613 min read

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NR Supplement: The Complete Guide to Nicotinamide Riboside

NR is the most human-tested NAD+ precursor on the market. Here's what 15 randomized trials actually show — dose, timing, side effects, and how it compares to NMN.

Jul 5, 202612 min read

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The Best Anti-Aging Supplements: What the Evidence Actually Supports

Cut through the $60B supplement industry. Only five supplements have the human data, effect size, and safety record to earn a spot in your longevity cabinet.

Jul 4, 202612 min read

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The Best Diet for Longevity: What the Science Actually Shows

Strip away the branding — Mediterranean, Blue Zones, MIND — and every longevity diet with human evidence lands on the same pattern. Here it is, translated into a plate.

Jul 3, 202613 min read

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How to Improve HRV: The Complete Guide to Raising Heart Rate Variability

HRV is the clearest window into your nervous system, recovery, and longevity. Here's the science-backed protocol to raise yours in 4–8 weeks.

Jul 2, 202612 min read

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How to Increase Deep Sleep: The Evidence-Based Protocol

Deep sleep is when your body repairs, consolidates memory, and clears the brain. Here's exactly how to get more of it — backed by sleep science.

Jul 2, 202611 min read

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How to Increase VO2 Max: The Complete Longevity Guide

VO2 max is the single strongest predictor of all-cause mortality. Here's the evidence-based protocol to raise yours — at any age.

Jul 1, 202612 min read

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How to Reverse Your Biological Age: An Evidence-Based Protocol

Biological age isn't fixed. Randomized trials show it can drop 3 years in 8 weeks with the right inputs. Here's what actually works.

Jun 28, 202611 min read

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Sleep Debt Is Aging You: The Data Behind 7 Hours

Chronic short sleep accelerates biological aging across every organ system. Here's the science, the biomarkers, and a simple protocol to reverse it.

Jun 24, 20269 min read

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Zone 2 Cardio: The Longevity Engine Hiding in Plain Sight

Why low-intensity aerobic work outperforms flashy HIIT for mitochondrial density, metabolic flexibility, and healthspan — and how to program it.

Jun 2, 20267 min read

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Biological Age Test Comparison: Lifestyle vs Blood vs Epigenetic

How the three main biological age testing methods stack up on accuracy, cost, and turnaround — and which one to start with.

May 14, 20268 min read

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