David Sinclair Profile picture
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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Oct 7 7 tweets 1 min read
Statistically, you should not exist:

– Life-friendly universe: 1/10⁶⁰
– Earth + moon: 1/10⁹
– Multicellular life: 1/10⁴
– Intelligence & civilization: 1/10⁹
– Your genome: 1/70 trillion

You’ve already won the lottery 10 times in a row. Ignore small people & enjoy! Equivalent odds: winning the Powerball jackpot 10 times in a row
Oct 4 4 tweets 1 min read
DNA breaks from cosmic rays disrupt the epigenome and release virus-like retrotransposons. Not wild theory. Fact

X-rays and CT scans probably do too but no one talks about it This study in 2008 was the first evidence for the information theory of aging in mammals - the idea that DNA breaks and other major stresses cause chromatin modifiers like SIRT1 to relocate, which disrupts the epigenome & changes the expression of genes in ways that cause aging Image
Oct 2 5 tweets 2 min read
Some plant polyphenols (resveratrol, quercetin & berberine) turn out to be dual modulators of both SIRT1 & GSK3b - important pathways for neuroprotection & epigenetic age resets... 🧵Image In 2008, we showed movement of the NAD-dependent enzyme SIRT1 away from regulated genes to DNA breaks (which happen every day in every cell) is a key process in the loss of epigenetic information that we have proposed leads to aging and diseases
cell.com/fulltext/S0092…Image
Oct 1 16 tweets 4 min read
Can cheek swab DNA reveal meaningful signals about your health, diseases and biological age?🏃‍♂️🏃‍♀️🧵... Image Background: DNA methylation (DNAme) is a chemical modification of DNA on the "Cs" in DNA, which changes over time, the rate of which depends on how healthy you live over the course of your life... ⏰ Image
Sep 28 9 tweets 3 min read
Exciting new paper @nature that could explain why inflammation rises as we age and why healthy diets and exercise suppress inflammation 👏 🧵 Image Various mitochondrial stressors, such as pathogen infection and metabolic deficiencies, trigger the release of mtDNA into the cytosol and an inflammatory response, but why? Image
Sep 22 5 tweets 2 min read
NEW STUDY: The amino acid L-theanine, first isolated from green tea in the 1940s, is used to improve mood and sleep 🍵 Study in mice finds L-theanine suppresses metastasis of prostate cancer, the second most common cause of death in men worldwide... 🧵 Image L-theanine is known to reduce inflammation, stress and anxiety, among other effects. It is primarily found in tea leaves, especially green & black. Also in supplements. Common doses are 100 - 400 mg/d Image
Sep 16 7 tweets 2 min read
Should aging be called a “disease”? A new philosophy paper says NO

Here are 4 arguments it may do more harm than good... 🧵

What do you think? Image 1. Labeling aging a disease could fuel ageism. Employers already assume older adults are less capable. The “disease” label may reinforce stereotypes and discrimination
Aug 29 7 tweets 1 min read
NEW PAPER: Great summary of drugs and supplements that extend lifespan in mice & the likelihood humans will see similar gains in the near future... 🧵 Image Link to paper by Dr. Adiv Johnson link.springer.com/article/10.100…
Aug 26 13 tweets 4 min read
NEWS: @lifebiosciences reports new drug candidate ER-300 improves liver health, while ER-100 restores healthy DNA methylation patterns in the monkey eye, with clear functional improvements. Human trials are on track for January. It’s happening...
🧵 tinyurl.com/4dysm7bvImage This news is strong evidence that the original vision to develop therapies that reversal of aging to prevent and cure diseases of aging and injuries isn’t just a fanciful idea
nature.com/articles/s4358…
Aug 19 12 tweets 2 min read
A new study of 3720 people finds that low quality diets (e.g. refined grains, sodium, solid fats, added sugar & alcohol) associate with a faster pace of aging than healthy diets (e.g. whole fruits, greens, beans, dairy & whole grains) 🧵... Image The DunedinPACE aging measure was designed to assess the pace of aging by using 20 years of longitudinal measurements of 19 different biomarkers
Aug 17 7 tweets 2 min read
NEW STUDY: NMN protects against alcohol-induced damage to the liver 🍻 Image A decline in hepatic NAD+ levels due to ethanol exposure is recognized as a key contributor to alcoholic liver injury
Aug 14 14 tweets 3 min read
Still struck by the dramatic effects of psilocybin on mouse health & lifespan 🍄‍🟫

Here’s some info about this molecule & where people obtain it: 🧵… Image Over 180 mushroom species contain psilocybin, including Psilocybe cubensis, Psilocybe semilanceata (Liberty caps), and others Image
Jul 30 5 tweets 2 min read
The decreasing ratio of working to sick people is a threat to civilization. As more people live longer, sicker, and fewer are born, the ratio will reach a catastrophic 1:1 by 2080!

There is a solution 🧵 Image By 2100, without improving healthspan or reversing fertility decline, the U.S. could lose over 50% of its workforce-driven GDP. Globally, the drop could exceed 40%. The future of economic stability depend as much on health as it does on innovation
Jul 3 18 tweets 4 min read
Recent news claimed scientists at UCLA had solved hair loss. Is this true?

Let's dive in 🧵 Image Positive results were announced from a Phase 2a (efficacy) of a molecule called PP405 for the treatment of hair loss, Pelage Pharmaceuticals announced a few days ago.

So what were the results and what is PP405? businesswire.com/news/home/2025…
Jul 2 4 tweets 2 min read
NEW STUDY: Ocampo Lab publishes reprogramming cocktails that reduce DNA damage & extend lifespan of worms up to 42%.

The race is on to test them in humans 🚀 Image Here's our 2023 paper:
aging-us.com/article/204896Image
Jun 30 8 tweets 3 min read
NEW STUDY: Only 14 centenarians in this study but higher heart rate variability (SDNN) was associated with longer life.

How do you know your SDNN? 🧵 Image In 14 centenarians followed until death, only SD of normal-to-normal interval (SDNN) showed significant correlation (ρ = 0.536; p = 0.048) with survival prognosis Image
May 28 16 tweets 3 min read
"We aim to understand & reverse the underlying mechanisms of aging to treat a range of diseases & injuries...The loss of funding halts ongoing experiments that cannot simply be restarted," geneticist David Sinclair told @BBCNews 🧵
bbc.com/news/articles/… "The administration's excuse that these policies somehow address antisemitism are so absurd," said Jacob Miller, a student and former head of Harvard Hillel, the Jewish social hub on campus
May 27 9 tweets 3 min read
NEW STUDY: 1 in 5 US kids is nutrient deficient. Malnutrition is associated with epigenetic age acceleration, up to 4.19 yrs. Therefore, it's key for you & your family to eat fresh food or take certain vitamins 🥦🫐🫛🥑

Here are 5 effects of a deficiency & how to prevent it:Image 1. Obesity & metabolic disorders because processed foods are high in sugar, salt, & unhealthy fats.

2. Poor gut health - a lack of fiber & plant diversity impairs the microbiome... Image
May 24 7 tweets 2 min read
NEW STUDY: Intermittent fasting produces anti-depressant effects by modulating the dopamine receptor in mice. Could depression & social media addiction be cured by fasting? 🧵 Image Dopamine addiction related to social media occurs when users become reliant on the instant gratification and pleasure derived from likes, shares, and notifications, which trigger dopamine release in the brain
May 24 7 tweets 2 min read
Proud to share a free link to our latest paper — a mouse metabolomics frailty prediction clock ⏰

Collab with @Alice_E_Kane 👏 @Nature_NPJ Image Frailty assessments of older people are commonly used in both the clinic and research, yet there are no accepted frailty biomarkers, and very little is known about the underlying molecular mechanisms of frailty
May 21 5 tweets 2 min read
Medical misinformation is dangerous. Fact is statins reduce cardiovascular risk by ~25% per 1 mmol/L LDL drop (Lancet, 2010) & don’t harm the brain, which makes its own cholesterol (JAMA Neuro, 2021).

Statins aren’t “harmless” but social media myths are far more harmful 🧵 Data from 170,000 people indicates each 1 mmol/L reduction in LDL cholesterol with statin therapy reduces the risk of major vascular events by approximately 25%, regardless of baseline cholesterol levels thelancet.com/article/S0140-…