David Sinclair Profile picture
Professor researching why we age & how to reverse it. Author & host of Lifespan. Mission: Extend healthy life for all. Views are entirely his own πŸ™βœŒοΈ
Mar 21 β€’ 15 tweets β€’ 5 min read
For 25 years, my team has been told we were wrong, by scientists, big pharma, the media, ethicists, and trolls. It hasn’t been easy

Looking back, it was 100% worth it

Here’s why you should believe in yourself… 🧡 In my 20s and 30s, I didn’t realize that criticism is actually a positive sign. It’s easy to see in retrospect, but those days were incredibly tough for all of us in the Sinclair lab and a lesson for everyone who’s looking to change the world Image
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Mar 16 β€’ 25 tweets β€’ 7 min read
So great to see the OG work that helped spark the longevity revolution taken to the next level:

New paper confirms two main causes of aging:
1. DNA instability -> epigenetic noise
2. Mitochondrial decline
...independently causing failure of the cell

Is this relevant to us? 🧡 Image Firstly, Dan Gottschling is a legend, having discovered yeast epigenetic gene silencing at the gender genes (a/alpha), telomeres, and painfully scooped me as a postdoc in 1996 by publishing epigenetic silencing at the ribosomal DNA (rDNA) πŸ˜† ... Image
Mar 8 β€’ 16 tweets β€’ 4 min read
Osteoarthritis & back pain affects millions of people. Instead of managing symptoms, imagine rebuilding joints by making them young

New study shows the reprogramming gene combo OSK regrows joints in mice & effect depends on TET2 so it's epigenetic...🧡 Image While limited to mouse models, these findings add to a growing body of evidence that rejuvenation by epigenetic reprogramming may safely reverse aging-related decline in multiple tissues, or whole body one day Image
Mar 1 β€’ 15 tweets β€’ 3 min read
According to ITOA, NAD declines with age, causing epigenetic changes & disease susceptibility

In 2010, we showed NAD-dependent enzyme, SIRT3, protects the heart 🐁

New study says NAD precursor NMN protects the heart via SIRT3 in mice fed a Western diet

Why's that important? 🧡 Image In the United States alone, about 1 in 5 deaths is due to cardiovascular disease. That’s roughly 700K-900K deaths per year. Globally, cardiovascular disease causes nearly 20 million deaths annually
Feb 22 β€’ 9 tweets β€’ 2 min read
Good news: Another study showing that fasting can help cancer patients. A 16 hour fast enhanced the cancer-killing activity of T cells and synergized with immunotherapy to reduce tumor size, ostensibly by causing cancer cells to release the amino isoleucine... 🧡 Image In the tumor microenvironment (TME), there was increased isoleucine processing and intracellular acetyl-coA, along with increase expression of genes involved in the starvation response, autophagy
Feb 1 β€’ 4 tweets β€’ 1 min read
New "Cardiometabolic Clock" identifies biomarkers that associate with disease & early death:

1. HbA1c
2. Creatinine
3. Lymphocyte %
4. Urea nitrogen (BUN)
5. Red Cell Dist. width (RDW)
6. Pulse
7. Systolic blood pressure

Now you can calculate your CardioMetAge! Image Heres the formula: πΆπ‘Žπ‘Ÿπ‘‘π‘–π‘œπ‘€π‘’π‘‘π΄π‘”π‘’π‘ƒπ‘Ÿπ‘’π‘‘π‘–π‘π‘‘ = 0.831320 Γ— π‘Žπ‘”π‘’ + 19.5734 Γ— log( 𝐻𝑏𝐴1𝑐 + 1) + 1.77394 Γ— π‘…π·π‘Š + 0.0760217 Γ— 𝑆𝐡𝑃 + 6.18803 Γ— π‘π‘Ÿπ‘’π‘Žπ‘‘π‘–π‘›π‘–π‘›π‘’ βˆ’ 0.148076 Γ— π‘™π‘¦π‘šπ‘β„Žπ‘œπ‘π‘¦π‘‘π‘’ π‘π‘’π‘Ÿπ‘π‘’π‘›π‘‘ + 0.218946 Γ— 𝑀𝐢𝑉 + 0.105980 Γ— 𝑝𝑒𝑙𝑠𝑒 π‘Ÿπ‘Žπ‘‘π‘’ + 0.0603608 Γ— 𝑃𝑃 + 0.636711 Γ— π‘ˆπ΄ + 2.40001 Γ— log( 𝐢𝑅𝑃 + 1) + 0.0283277 Γ— π‘ŠπΆ + 0.0754119 Γ— π΅π‘ˆπ‘ βˆ’ 101.454
Jan 18 β€’ 19 tweets β€’ 5 min read
Amazing! Placing mice in low air pressure every other day slows hair loss, weight gain, osteoporosis & extends median lifespan by 12%. Ascribed to the killing of senescent, zombie cells

Could exercise, high altitude, or a drug have similar benefits? Let’s dig in🧡 Image Firstly, hypobaric (low) pressure should not to be confused with hyper-baric oxygen therapy (HBOT), which is also studied by longevity researchers, though there may be overlapping hormetic mechanisms between the two @NaturePortfolio
Jan 14 β€’ 16 tweets β€’ 3 min read
New study indicates that a decrease in nerve cell cholesterol caused by cortisol, inflammation & low SIRT1 activity may be a cause of major depression.

So, do statins exacerbate depression?

And since SIRT1 is NAD⁺-dependent, could NAD⁺ boosters treat or prevent depression? β€¦πŸ§΅Image Around 5–5.7% of adults worldwide experience depressive disorders at any given time. >280 million people! Image
Jan 4 β€’ 10 tweets β€’ 2 min read
Cannabidiol (CBD) does amazing things. According to a new study it:

* Increases SIRT1 & autophagy βœ…
* Decreases mTOR βœ…
* Upregulates SOX2 & OCT4 βœ…
* Preserves telomeres βœ…
* Reduces inflammatory NF-kB βœ…
* Slows stem cell aging βœ…

🧡 Image CBD, or cannabidiol, is the second most prevalent active ingredient in marijuana, with no effects indicative of any abuse or dependence potential
Oct 7, 2025 β€’ 7 tweets β€’ 1 min read
Statistically, you should not exist:

– Life-friendly universe: 1/10⁢⁰
– 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, 2025 β€’ 4 tweets β€’ 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, 2025 β€’ 5 tweets β€’ 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, 2025 β€’ 16 tweets β€’ 4 min read
Can cheek swab DNA reveal meaningful signals about your health, diseases and biological age?πŸƒβ€β™‚οΈπŸƒβ€β™€οΈπŸ§΅... 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, 2025 β€’ 9 tweets β€’ 3 min read
Exciting new paper @nature that could explain why inflammation rises as we age and why healthy diets and exercise suppress inflammation πŸ‘ 🧡 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, 2025 β€’ 5 tweets β€’ 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, 2025 β€’ 7 tweets β€’ 2 min read
Should aging be called a β€œdisease”? 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 β€œdisease” label may reinforce stereotypes and discrimination
Aug 29, 2025 β€’ 7 tweets β€’ 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, 2025 β€’ 13 tweets β€’ 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, 2025 β€’ 12 tweets β€’ 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, 2025 β€’ 7 tweets β€’ 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, 2025 β€’ 14 tweets β€’ 3 min read
Still struck by the dramatic effects of psilocybin on mouse health & lifespan πŸ„β€πŸŸ«

Here’s some info about this molecule & where people obtain it: πŸ§΅β€¦ Image Over 180 mushroom species contain psilocybin, including Psilocybe cubensis, Psilocybe semilanceata (Liberty caps), and others Image