Knowledge Map / Science
Genetics & Epigenetics
What's permanently written in your DNA, and what's just switched on or off as you age.
Overview
Genetics is the study of the DNA sequence you inherit; epigenetics is the study of how that sequence gets read, switched on, or silenced over a lifetime without the underlying code itself changing. Both shape aging — genetic variants are linked to differences in lifespan and disease risk, while epigenetic marks like DNA methylation drift in predictable patterns as cells age, which is exactly what epigenetic clocks measure.
Tools like CRISPR-based gene editing and gene therapy give researchers a way to directly add, remove, or correct genetic instructions in living cells. A newer wave of epigenetic reprogramming research is testing whether resetting a cell's epigenetic state can make it behave younger without erasing its identity.
Why it matters
If part of aging is written in reversible chemical marks rather than permanent damage, that reframes a portion of it as something that might be edited back, not just slowed down.
Research & reports
Field guide
Scientists, companies & technologies
Timeline
Milestones
FAQ
What's the difference between genetics and epigenetics?
Genetics is the sequence itself; epigenetics is the layer of chemical instructions controlling which genes that sequence actually uses.
Is gene editing the same as gene therapy?
Related but distinct. Gene editing changes the DNA sequence directly (as with CRISPR), while gene therapy more broadly means introducing genetic material to treat or prevent disease, which can use editing or other delivery methods.
Can epigenetic changes be reversed?
Some appear to be, at least partially and in lab settings. This is one of the most active and contested areas of longevity research.
Related topics
References