Aging & Longevity
Guides and analysis on aging biology, lifespan heritability, and the difference between intrinsic and extrinsic mortality.
Aging research is shifting from treating diseases individually to understanding the shared biological processes that increase vulnerability over time. This hub organizes those concepts — from mortality theory to molecular mechanisms to what you can actually do about it.
🧭 Start Here — Foundations
If you're new to longevity science, begin with these core concepts.
- Aging and Longevity Basics
What aging is, what longevity means, and what actually changes in the body over time.
- Healthspan vs Lifespan
Why living longer and living well aren't the same thing.
- Biological Age vs Chronological Age
How your body's age can diverge from the calendar — and why it matters.
- What Determines Human Lifespan?
Genetics, environment, and lifestyle — how much each factor actually contributes.
- Intrinsic vs Extrinsic Mortality
The key distinction that clarifies most debates about aging, genetics, and longevity.
🧬 Mechanisms
How aging actually happens at the biological level.
- The Hallmarks of Aging Explained
The core biological processes that drive aging — and how they shape healthspan, lifespan, and disease risk.
- Epigenetics and Aging
How gene expression changes with age — and what epigenetic clocks can and can't tell us.
🏃 Lifestyle & Interventions
What the evidence actually supports for extending healthspan.
- Longevity Lifestyle Basics
Sleep, exercise, diet, and stress — the foundations with the strongest evidence base.
- Longevity Interventions: What Has Evidence?
A clear-eyed review of supplements, drugs, and protocols — what's supported and what's hype.
💪 Muscle, Metabolism & Aging
Two of the most modifiable drivers of how well you age.
- Sarcopenia: Muscle Loss with Age
Why muscle mass declines, why it matters, and the evidence on resistance training and protein.
- GLP-1 Drugs and Aging
What weight-loss medicines mean for older adults — benefits, muscle risk, and practical guidance.
🧴 Skin & Appearance Aging
- Skin Aging: Causes, Prevention, and Treatment
What drives skin aging intrinsically and extrinsically — and what topical treatments have real evidence.
📰 Analysis & Debate
Where longevity science challenges conventional thinking.
- Longevity Genetics Just Got Rehabilitated
New evidence suggesting intrinsic human lifespan may be ~50–55% heritable once confounding deaths are removed.
- How “Lifestyle Over Genes” Became Medical Dogma
Why aging genetics were sidelined — and why that story is now collapsing.