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David A. Sinclair, Ph.D.

@davidsinclairphd.bsky.social
958 followers 14 following 278 posts

Professor @Harvard researching why we age & how to reverse it. Author & host of Lifespan. Mission: Extend healthy life for all. Views are entirely his own 🙏✌️

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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 19/09/2026
Stem cells don't run out, they get told to stop dividing and that instruction can be renegotiated
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 19/09/2026
Metformin's anti-aging reputation rests mostly on people who already had diabetes
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 19/09/2026
Evolution never optimized you for a hundred healthy years, that's a job you must finish yourself
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 31/07/2026
The best longevity drug available today is exercise and building muscle 💪
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 31/07/2026
Your future health isn’t determined by your birthday. It’s determined by what you repeatedly do between now and then 💪
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 09/06/2026
@lifebiosciences has confirmed the first patient has been dosed with an epigenetic restoration drug candidate. Exciting milestone 🚀 Life Biosciences is the OG cellular rejuvenation company, using epigenetic restoration to reverse diseases of aging lifebiosciences.com/life-bioscie...
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 04/06/2026
The body responds to intensity more than duration. Even ~4.4 minutes of vigorous daily movement associates with ~26–30% lower mortality risk join.lifespan.com/577uh3zr
join.lifespan.com
Association of wearable device-measured vigorous intermittent lifestyle physical activity with mortality - Nature Medicine
Using data from wearable activity monitors, this study shows that short bursts of physical activity that are done as part of daily life activities and that are only 1 or 2 minutes in length are…
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 23/05/2026
Aging is noise in the system and noise can be reduced
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 23/05/2026
The question is not whether we age but how fast
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 23/05/2026
Cells respond to mild adversity by becoming stronger
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 23/05/2026
The more stable the system the slower the aging
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 22/05/2026
Aging is a drift away from optimal gene expression
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 22/05/2026
Longevity comes from maintaining order in complex systems
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 21/05/2026
Cells do not forget how to be young, they lose access
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 21/05/2026
The genome largely stays intact. What changes is how it is read
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 19/05/2026
Biological clocks are entering the medical mainstream
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 18/05/2026
The body is always responding to adversity and abundance
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 18/05/2026
Cells are resilient until pushed past repair capacity
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 17/05/2026
If aging is corrupted software, it can be reprogrammed
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 16/05/2026
Every system in the body is adapting all the time. You are in control
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 16/05/2026
Biology is not just chemistry, it is code
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 16/05/2026
The body remembers youth even when it looks old
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 16/05/2026
Aging is loss of information and the surprising finding is information can be restored
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 24/04/2026
From 2008-2024 I was accused of hyping (a common slur) for suggesting that changes to the epigenome might cause aging and that therapeutics could "allow us to reset the epigenome to a more youthful state." - Oberdoerffer & Sinclair (2009) Success has many fathers, while failure is an orphan
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 24/04/2026
Most people wait for disease.
By then, biology has already shifted
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 24/04/2026
Type 2 diabetes is associated with substantially higher mortality risk www.nejm.org/doi/full/10....
nejm.org
Diabetes Mellitus, Fasting Glucose, and Risk of Cause-Specific Death | NEJM
The extent to which diabetes mellitus or hyperglycemia is related to risk of death from cancer or other nonvascular conditions is uncertain. We calculated hazard ratios for cause-specific death, ac...
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 23/04/2026
Higher omega-3 levels are linked to ~15–20% lower mortality risk. More here: www.nature.com/articles/s41...
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 23/04/2026
Biology doesn’t care what’s “normal.”
It responds to signals. And it can be changed
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 21/04/2026
Muscle mass is a stronger predictor of survival than BMI in older adults Read here: www.sciencedirect.com/science/arti...
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 20/04/2026
Prevention is delayed treatment of aging
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 19/04/2026
The goal isn’t longer life.
It’s longer function and performance. Longer life is the side effect
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 18/04/2026
The earlier you intervene, the bigger the payoff
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 18/04/2026
About 7,000 steps/day is associated with ~50–70% lower mortality vs low activity jamanetwork.com/journals/jam...
jamanetwork.com
Steps per Day and All-Cause Mortality in Middle-aged Adults
This cohort study assesses the association of step volume and intensity with premature all-cause mortality among Black and White participants in the Coronary Artery Risk Development in Young Adults…
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 18/04/2026
Fixed it
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 18/04/2026
The future of medicine is treating causes, not symptoms. Aging is the main cause of disease
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 18/04/2026
Longevity isn’t about perfection.
It’s about direction
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 16/04/2026
You don’t need more time.
You need better biology
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 16/04/2026
Aging is the biggest unmet medical need by orders of magnitude
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 15/04/2026
REMOTE CONTROL MICE! A group from Seoul has just published in Cell that they’ve discovered a crazy-weird protein (Cyb5b) that can be used to turn on any gene when exposed to EMFs. They used it to turn on OSK and extend the lifespan of a progeroid mouse. Amazing! www.cell.com/cell/abstrac...
cell.com
Electromagnetic field-inducible in vivo gene switch for remote spatiotemporal control of gene expression
The EMF-inducible gene switch (Ei) platform provides precise spatiotemporal control of gene expression through Cyb5b-mediated calcium oscillations. This system enables Ei-OSK-driven in vivo rejuvenati...
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 14/04/2026
Are annoying age spots due to epigenetic drift, a likely cause of aging? "Consistent with the Information Theory of Aging, we found a global disruption of tight epigenetic regulation"...at genes involved in DNA repair, inflammation & mitochondria Fascinating! link.springer.com/article/10.1...
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 14/04/2026
Cardiorespiratory fitness is a strong and consistent predictor of mortality across populations jamanetwork.com/journals/jam...
jamanetwork.com
Low-Value Preoperative Care for Patients Undergoing Cataract Surgery at a Safety-Net Health System
This study assesses the utilization and costs of a multipronged quality improvement initiative to reduce low-value preoperative utilization for patients undergoing cataract surgery at 2 safety-net…
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 13/04/2026
We don’t lack tools.
We lack urgency
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 12/04/2026
Longevity science is accelerating faster than expected
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 11/04/2026
We are closer to controlling aging than most people realize
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 10/04/2026
Small interventions shift long-term trajectories
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 09/04/2026
If we can slow aging, we delay multiple diseases at once
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 09/04/2026
Cardiovascular mortality is ~32–34% lower with brief daily bursts www.nature.com/articles/s41...
nature.com
Association of wearable device-measured vigorous intermittent lifestyle physical activity with mortality - Nature Medicine
Using data from wearable activity monitors, this study shows that short bursts of physical activity that are done as part of daily life activities and that are only 1 or 2 minutes in length are…
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 08/04/2026
Large meta-analysis of ultra-processed food intake is linked to multiple chronic diseases, not just obesity
www.bmj.com/content/384/...
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 07/04/2026
Biology is programmable
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David A. Sinclair, Ph.D. @davidsinclairphd.bsky.social · 06/04/2026
Semaglutide reduces major cardiovascular events in people with obesity without diabetes (SELECT trial) www.nejm.org/doi/full/10....
nejm.org
Semaglutide and Cardiovascular Outcomes in Obesity without Diabetes | NEJM
Semaglutide, a glucagon-like peptide-1 receptor agonist, has been shown to reduce the risk of adverse cardiovascular events in patients with diabetes. Whether semaglutide can reduce cardiovascular ...
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