Dr. Steve Horvath on epigenetic aging to predict healthspan: the DNA PhenoAge and GrimAge clocks

Lifestyle Factors

Dr. Steve Horvath explains that lifestyle factors like diet, exercise, and smoking can influence epigenetic aging, but their effects are relatively weak. He emphasizes that while healthy habits are beneficial, they may not significantly extend lifespan for already healthy individuals. However, for those with unhealthy lifestyles, adopting healthier habits can have a substantial impact on their epigenetic age 1. Horvath also discusses the potential of caloric restriction to slow epigenetic aging, particularly in mice, though human studies are still needed 2.

Everything your grandmother ever told you about living a healthy lifestyle is kind of corroborated by our epigenetics clocks.

--- Steve Horvath

   

Supplementation

Horvath highlights the potential of supplements like Vitamin D and Omega-3s in influencing epigenetic aging. He mentions a study where Vitamin D supplementation reduced the epigenetic age of obese African Americans, though larger studies are needed to confirm these findings 3. Additionally, Omega-3 supplements have been associated with slower aging according to the GrimAge clock, despite mixed results from large-scale clinical trials 4.

It would be brilliant if a simple intervention as taking a vitamin D supplement actually affected the epigenetic age.

--- Steve Horvath

   

Fasting

The discussion also covers the impact of fasting and caloric restriction on epigenetic aging. Horvath notes that while caloric restriction has been shown to slow the epigenetic clock in mice, its effects on humans are less clear 2. He mentions ongoing studies analyzing the effects of various fasting protocols, with the hope of finding significant results in human subjects 5.

Definitely caloric restriction slows the epigenetic clock in mice.

--- Steve Horvath