
The 7 Habits of People Who Age Slower | Dr. Steve Horvath
In this episode, Rhonda Patrick interviews Dr. Steve Horvath, a pioneering longevity researcher and creator of the Horvath epigenetic clock. They discuss the science behind biological aging, how to measure it, and which lifestyle interventions truly slow the aging process.
Key Takeaways
- Measuring Biological Age: Different epigenetic clocks (Horvath, PhenoAge, GrimAge, DunedinPACE) track distinct aspects of aging, from mortality risk to pace of aging.
- Lifestyle Interventions:
- Multivitamins: The COSMOS trial showed that daily multivitamin use slowed brain aging by 2.1 years and episodic memory decline by nearly 5 years.
- Omega-3: A randomized controlled trial found omega-3 supplementation (1 gram) improved multiple epigenetic clocks.
- Vitamin D: Supplementation reverses age acceleration in deficient individuals but has no effect in those with sufficient levels.
- Exercise: Intensive cycling (4.5 hours/week for 6 months) reduced GrimAge by 7.4 months. Moderate walking shows only weak effects.
- Diet: High vegetable intake (measured by blood carotenoids) correlates strongly with lower epigenetic age – stronger than exercise.
- Weight Loss: Significant weight loss (e.g., from GLP-1 agonists or lifestyle changes) improves all epigenetic clocks, especially in obese individuals.
- Social Connections: Strong family and community ties reduce GrimAge, sometimes more than inflammatory biomarkers.
- Sleep: Sleep disturbances are associated with higher epigenetic age, but detailed sleep-stage effects are still being studied.
- Stress: Short-term psychological stress does not affect epigenetic clocks, but chronic stress (e.g., PTSD, childhood abuse) does.
- Yamanaka Factors: Partial reprogramming can rejuvenate cells, but some damage (e.g., somatic mutations) remains.
Dr. Horvath highlights that combining multiple healthy habits (e.g., omega-3, exercise, social connections) yields the strongest effects. He follows a healthy routine himself: daily exercise, omega-3, multivitamin, vitamin D, plenty of vegetables, and a cooling mattress for better sleep.






