#112 How To Slow Biological Aging With a Multivitamin, Vegetables, & Omega-3 | Dr. Steve Horvath
Dr. Steve Horvath discusses biological aging, the science behind epigenetic clocks like GrimAge and DunedinPACE, and how they measure mortality risk and aging pace. He explores evidence-backed interventions like omega-3s, multivitamins, and exercise for shifting biological age, emphasizing precision and limitations.
Deep Dive Analysis
26 Topic Outline
Defining Biological Aging and Measurement Technologies
Epigenetic Clocks and Tracking Damage Accumulation
Distinguishing Different Epigenetic Clocks and Their Focus
PhenoAge, GrimAge, and Mortality Risk Prediction
Epigenome as a Memory of Stressors and Exposures
DunedinPACE: Measuring the Pace of Aging
Which Clocks are Best for Judging Longevity Interventions
Epigenetic Clocks as Surrogate Endpoints for Clinical Trials
Robust Interventions for Epigenetic Age Reversal
Interpreting Claims of Significant Age Reversal
Epigenetic Clocks and Predicting Lifespan
What Epigenetic Clocks Fail to Capture
Rejuvenation of Blood and Organ Transplants
Caloric Restriction and GLP-1 Agonists on Epigenetic Age
Impact of Multivitamins on Brain and Epigenetic Aging
Omega-3s, Vitamin D, and Exercise Effects on Aging Clocks
Vegetable Intake and Epigenetic Aging
Intense Exercise and Epigenetic Aging
Body Temperature and Hibernation Effects on Aging
Sleep Disruption and Social Connection in Biological Aging
Consumer Biological Age Tests and Reliability
Future of AI in Developing Better Aging Clocks
Partial Reprogramming and Cellular Rejuvenation
Somatic Mutations and Their Role in Aging
Steve Horvath's Personal Longevity Routine
Short-Term Stress and Epigenetic Clocks
8 Key Concepts
Biological Age
A measure of an individual's physiological and molecular health, reflecting their disease and mortality risk, which can differ from chronological age. It's quantified using various technologies, from wearables to molecular markers like DNA methylation.
Epigenetic Clocks
Measurement tools based on DNA methylation patterns at specific genomic locations that quantify biological age, track damage accumulation, and predict mortality risk or the pace of aging. Different clocks are sensitive to different biological processes.
DNA Methylation
Chemical changes to the DNA molecule (gain or loss of methyl groups) that affect gene expression without altering the underlying DNA sequence. These patterns change with age, and certain changes are used by epigenetic clocks.
PhenoAge Clock
A second-generation epigenetic clock designed to track biochemical markers, changes in blood cell composition, and organ dysfunction, making it an impressive predictor of mortality risk.
GrimAge Clock
A highly impressive mortality risk predictor, developed by combining methylation estimators of various famous proteins (like C-reactive protein) and smoking history into a linear combination. It measures the instantaneous hazard of death.
DunedinPACE Clock
An epigenetic clock designed to measure the 'pace of aging' or the speed at which an individual is aging, constructed by tracking rates of change in established physiological and biochemical markers over time.
Surrogate Endpoint
A biomarker used in clinical trials that is intended to substitute for a clinical endpoint (like mortality) and is expected to predict clinical benefit. Epigenetic clocks aspire to be surrogate endpoints for longevity interventions but lack full regulatory approval.
Partial Reprogramming
The application of Yamanaka factors (transcription factor proteins) to old cells for a brief period to rejuvenate them without causing them to lose their original cellular identity, aiming to reverse aging without inducing cancer risk.
14 Questions Answered
Biological aging refers to the physiological and molecular processes that lead to varying disease and mortality risks among individuals of the same chronological age, measured by technologies like wearables, imaging, and molecular markers such as DNA methylation.
No, different epigenetic clocks are constructed to track distinct aspects of aging, such as inflammation, metabolic health, smoking history, mortality risk, or the pace of aging, and thus often provide different readouts.
The methylation estimate appears to capture long-term exposures and the epigenome's memory of stressors, which can be more predictive of future mortality risk than instantaneous plasma levels or potentially biased self-reported data.
Yes, GrimAge can be reversed to some extent, particularly in individuals starting with accelerated epigenetic age due to unhealthy baselines, though the effects from supplements or lifestyle changes in already healthy individuals tend to be minor.
No, while GrimAge can estimate an age at death, this prediction comes with a large error bar (e.g., plus/minus six years) and is considered scientifically unsound for precise individual prediction.
A younger GrimAge indicates a reduced instantaneous mortality risk in the next year compared to an average person of the same chronological age and sex, rather than a direct prediction of a longer lifespan.
Epigenetic clocks do not effectively capture all hallmarks of aging, notably senescent cells (senolytics) and telomere length, and radiation-induced DNA damage in cells.
Current animal studies, such as heterochronic parabiosis, show that young circulation can rejuvenate multiple organs at the methylation level, but these effects are often transient and do not necessarily translate to lasting body-wide rejuvenation once the intervention stops.
Caloric restriction in the CALERIE study showed a weak effect on epigenetic clocks, but GLP-1 receptor agonists inducing significant weight loss in obese individuals led to robust reversal across multiple clocks.
A daily multivitamin (e.g., Centrum Silver) has been shown to slow brain aging and epigenetic aging (PhenoAge and GrimAge) by a few months over a couple of years, especially by filling nutritional gaps.
Vegetable intake, as measured by carotenoid levels in blood, shows a much stronger negative correlation with GrimAge (around -0.3) than exercise (around -0.1), suggesting a more profound impact on epigenetic aging.
No, short-term psychological stress, such as worrying about deadlines or a podcast, does not appear to have a strong effect on epigenetic clocks, though severe long-term stress (e.g., trauma) can.
Many providers use standardized technologies (like Illumina array) and offer reliable data. While expensive, they can motivate adherence to healthy regimens. However, interpreting the results requires understanding which clock is used and its specific strengths and limitations.
AI and machine learning models are used to build new generations of epigenetic clocks (e.g., GrimAge 2, GrimAge 3, OMIC-MH) and are expected to lead to even more accurate and robust biomarkers for clinical trials in the future.
12 Actionable Insights
1. Prioritize Vegetable Intake for Epigenetic Health
Increase your consumption of vegetables, as high carotenoid levels (a marker of vegetable intake) show a strong negative correlation with GrimAge, indicating a significant positive impact on epigenetic aging, even more so than exercise.
2. Engage in Robust Exercise Routines
Commit to more intense and consistent exercise, such as cycling 4.5 hours per week, which has been shown to significantly reduce GrimAge by 7.4 months over a six-month period, suggesting a higher threshold of activity is needed to impact epigenetic clocks meaningfully.
3. Address Vitamin Deficiencies Promptly
If deficient in vitamin D, correct it to slow age acceleration, as this has been shown to reverse epigenetic aging. However, supplementing when already sufficient may not provide additional benefits for epigenetic age.
4. Consider Daily Multivitamin Supplementation
Take a standard multivitamin daily, especially if your diet has nutritional gaps. This can slow brain aging (by 2.1 years over 3.6 years) and epigenetic aging (by 2.7 to 5 months over two years), offering an easy and safe intervention.
5. Supplement with Omega-3 Fatty Acids
Incorporate omega-3 fatty acids into your regimen, as they have a beneficial effect on epigenetic clocks like GrimAge, PhenoAge, and DunedinPACE, particularly when combined with other healthy interventions.
6. Combine Healthy Lifestyle Interventions
Adopt a synergistic approach by combining interventions like omega-3s, vitamin D, and exercise. Studies show that using all three together can lead to greater biological age reversal (3.8 months over three years by PhenoAge) and reduced risks like metastatic cancer.
7. Seek Social Connection to Slow Aging
Actively foster strong social connections and community engagement. Research indicates that social advantage and robust relationships are associated with reduced GrimAge, highlighting the profound impact of social well-being on biological aging.
8. Avoid Chronic Stress and Toxic Relationships
Prioritize managing long-term stressors and exiting toxic relationships, as severe psychological stress (e.g., childhood abuse, PTSD) can accelerate epigenetic aging, making stress reduction crucial for longevity.
9. Use Biological Age Tests for Motivation
Consider getting a biological age test if you need motivation to adhere to healthy lifestyle regimens. While not strictly necessary to know that smoking cessation, exercise, and vegetable intake are beneficial, the data can reinforce commitment.
10. Target Strong Weight Loss for Age Reversal
If obese, prioritize significant weight loss, as interventions like GLP-1 receptor agonists leading to substantial weight reduction have shown robust reversal across multiple epigenetic clocks.
11. Understand Epigenetic Clock Limitations
Do not interpret a younger biological age from a test as a direct prediction of a longer lifespan. Instead, understand it as a reduced instantaneous mortality risk in the next year compared to an average person of the same age and sex.
12. Complement Epigenetic Clocks with Other Readouts
Recognize that epigenetic clocks do not capture all aspects of aging, such as senescent cells or telomere length. For a comprehensive view, combine epigenetic testing with other functional and molecular readouts.
8 Key Quotes
What I wanted to accomplish with these methylation clocks is to have a precise tool to allow researchers to actually identify novel interventions. How do we truly reverse the age, the ages of individual cells of organs and the whole organism?
Dr. Steve Horvath
The misconception is that people get disappointed that two different clocks lead to slightly different readouts. But the metaphor I want to use is, think of the world of proteomics. If I told you protein one measures the same as protein two, you would just not believe it.
Dr. Steve Horvath
The surprising finding is that the methylation estimate is actually a better predictor of your mortality risk, far better predictor of your mortality risk than the plasma measure.
Dr. Steve Horvath
If your grim age is 10 years younger than your calendar age, it does not mean you will now live 10 years longer than the average person. You see, you cannot compare this differential into a lifespan differential.
Dr. Steve Horvath
Epigenetic clocks should be conceptualized really as integrators of many different stressors, but not all. They don't capture everything.
Dr. Steve Horvath
Loneliness is the big killer in old age. And unfortunately, geriatric patients are often isolated.
Dr. Steve Horvath
Epigenetics, order of magnitude more informative than genetics.
Dr. Steve Horvath
The hopeful message about stress is that short-term stress does not seem to affect epigenetic clocks, psychological stress.
Dr. Steve Horvath
1 Protocols
Combined Longevity Intervention (Swiss Study)
Dr. Steve Horvath (describing Heike Bischoff-Ferrari's study)- Supplement with 1 gram of omega-3 daily.
- Supplement with 2,000 IUs of vitamin D daily.
- Perform mild resistance home exercise three times a week.