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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?
Show notes are available by clicking here
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