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
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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
Jul 30, 2025 β€’ 5 tweets β€’ 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, 2025 β€’ 18 tweets β€’ 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, 2025 β€’ 4 tweets β€’ 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 πŸš€ Image Here's our 2023 paper:
aging-us.com/article/204896Image
Jun 30, 2025 β€’ 8 tweets β€’ 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, 2025 β€’ 16 tweets β€’ 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