#112 How To Slow Biological Aging With a Multivitamin, Vegetables, & Omega-3 | Dr. Steve Horvath
6/7/20262 hr 47 min
The strongest anti-aging strategy may be less about dramatic reversal and more about removing what accelerates aging in the first place. In this episode, Dr. Steve Horvath maps out the science behind biological age and how aging clocks are changing the way researchers evaluate longevity interventions. He also explains why omega-3s, a daily multivitamin, and sufficient vegetable intake stand out as evidence-backed, compounding levers for shifting biological age over time.
Timestamps:
- (00:00) Introduction
- (07:05) What exactly is biological aging?
- (12:39) Do all aging clocks measure the same thing?
- (18:22) PhenoAge vs. GrimAge—how methylation reveals mortality risk
- (20:27) Why GrimAge is a powerful mortality predictor
- (24:10) How your epigenome remembers long-term stress
- (28:08) Can parents pass stress to offspring through the epigenome?
- (30:12) Why standard aging clocks fail in sperm
- (31:35) Can lifestyle changes reverse GrimAge?
- (33:24) How DunedinPACE tracks your aging speed
- (37:26) Which clock is best for testing longevity interventions?
- (39:47) Can methylation clocks replace long-term mortality studies?
- (43:33) Which interventions most reliably reverse epigenetic age?
- (46:31) Can someone reverse biological age by 5 years in 7 months?
- (50:49) Can GrimAge predict when you'll die?
- (52:36) Why a younger GrimAge doesn't mean more years of life
- (57:21) What epigenetic clocks fail to capture
- (1:03:26) Why aging clocks measure more than just inflammation
- (1:06:02) Does younger blood rejuvenate the whole body?
- (1:09:52) Can calorie restriction really slow biological aging?
- (1:14:00) Do GLP-1 drugs reverse epigenetic age?
- (1:17:29) Can a daily multivitamin slow epigenetic aging?
- (1:26:11) Omega-3, vitamin D, and exercise—which slows aging best?
- (1:34:01) Does correcting vitamin D deficiency reverse age acceleration?
- (1:36:29) Vegetables vs. exercise—which matters more for epigenetic age?
- (1:42:04) Does red meat accelerate epigenetic aging?
- (1:43:44) How much exercise is needed to slow epigenetic aging?
- (1:51:05) Can heat exposure mimic exercise?
- (1:52:29) Does a lower core body temperature slow aging?
- (1:54:54) How sleep disruption shows up on aging clocks
- (1:56:25) The role of social connection in biological aging
- (2:02:55) Are consumer biological age tests worth it?
- (2:07:52) How to choose a reliable biological age test
- (2:12:38) Why two epigenetic age tests might give different results
- (2:17:27) Can AI build better aging clocks?
- (2:18:58) Partial reprogramming—can cells become younger without losing identity?
- (2:22:52) What partial reprogramming can (and can't) reverse
- (2:27:43) Do DNA mutations actually drive aging?
- (2:29:59) Why no single intervention can stop aging
- (2:34:29) Why genetics aren't your destiny
- (2:38:38) Steve Horvath's longevity routine
- (2:43:11) Does short-term stress accelerate epigenetic aging?
Clips
Transcript preview
First 90 secondsRhonda Patrick· Host0:00
Welcome back to the podcast. Today, I'm joined by Dr. Steve Horvath, one of the most influential scientists in the biology of aging and a true legend in the field of longevity science. Steve is best known for pioneering the Horvath epigenetic clock, which is a breakthrough that really helped make biological aging measurable through DNA methylation. Before this work, aging was something mostly described through disease, frailty, organ decline, or simply just the passage of time. Steve's work really helped transform aging into something we could begin to quantify at the molecular level across different tissues, across different disease states, and across interventions. That contribution is hard to overstate. Epigenetic clocks are now central to some of the biggest questions in aging science, whether we can measure the rate at which someone is aging, whether lifestyle or medical interventions can slow that rate, and whether aspects of cellular age can actually be reversed. In this episode, Steve and I get into all of that. We talk about what biological aging clocks can tell us and what they cannot. This is important because biological age is not just one number. Some epigenetic clocks are more sensitive to inflammation, immune function, metabolic health, smoking history, or long-term stress exposure. Others are better at estimating our mortality risk, disease risk, or the current pace at which someone is aging.