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Dr David Sinclair: Can Aging Be Reversed? After 8 Weeks, Cells Appeared 75% Younger In Tests!

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Watch on YouTube aging reversal epigenetics cellular rejuvenation nad and sirtuins fasting and longevity dna repair age-related disease prevention

Harvard professor David Sinclair discusses groundbreaking research showing that aging can be reversed at the cellular level, with lab results demonstrating cells rejuvenated by approximately 75% after 8 weeks of treatment. He explains his information theory of aging, which posits that aging is fundamentally a loss of epigenetic information rather than irreversible wear-and-tear, and details upcoming human trials aimed at reversing blindness as a first step toward whole-body age reversal. The conversation covers practical lifestyle interventions and emerging therapies that could extend human healthspan by decades or potentially enable living into the 22nd century.

Key takeaways
  • Aging is an identity crisis of cells where epigenetic information becomes corrupted and cells lose their proper function, but this process can be reversed by reinstalling the "backup copy" of youthful cellular instructions.
  • The three genes used in age-reversal experiments safely reset cell age by approximately 75% and appear to work across multiple tissue types including the eye, brain, skin, and immune system, with human trials expected imminently.
  • DNA damage from everyday exposures—including X-rays, CT scans, frequent flying, and loud noise—accumulates over time and accelerates aging by triggering incomplete cellular repair that corrupts epigenetic information.
  • Fasting and caloric restriction raise NAD levels, which fuel sirtuins (cellular "conductors") that repair DNA and maintain epigenetic identity, making intermittent fasting one of the most powerful longevity interventions available.
  • Exercise, avoiding smoking, limiting alcohol, eating whole foods, and maintaining strong relationships can extend healthy lifespan by up to 14 years, with lifestyle factors accounting for 80–90% of aging rate independent of genetics.
  • Reversing aging may simultaneously cure age-related diseases like Alzheimer's, cancer, and heart disease because these conditions are fundamentally driven by the underlying aging process itself, not independent pathologies.
  • A comprehensive longevity supplement stack should include NAD precursors, resveratrol, sulforaphane, metformin, berberine, spermidine, glycine, vitamin D, vitamin K2, and aspirin to support cellular repair and slow epigenetic drift.

Recommendations (18)

NMN uses

"I've been taking NMN and admitting that publicly for a while now and my father who is an even more advanced experiment at 86. So yes, we've been taking it for over a decade now and we're still alive"

David Sinclair · ▶ 1:20:40

Tamoxifen uses

"We could feed it a drug tamoxifen which is used in chemotherapy. And that drug turned on a gene from a slime mold"

David Sinclair · ▶ 31:32

Matcha uses

"The reason for switching from coffee mainly to matcha in the morning for me is that it's full of polyphenols... I highly recommend it."

David Sinclair · ▶ 1:30:49

"I use a red light cap on my head to preserve my hairline... I do this red light cap when I can... for 6 minutes. Proven. It's proven to slow hair loss."

David Sinclair · ▶ 1:50:08

"I do take a teaspoon of olive oil in the morning and mix it with resveratrol polyphenol."

David Sinclair · ▶ 1:39:18

statins uses

"I've actually been on a statin to lower my LDL since I was 30... I insisted with my doctor initially with statins."

David Sinclair · ▶ 1:35:45

Sulforaphane recommends

"You can also take sulforaphane as a supplement if you don't like Brussels sprouts."

David Sinclair · ▶ 1:41:01

Ketone IQ
Ketone IQ uses

"I drink Ketone IQ before I do a podcast. It improves my clarity... I get the clarity of fasting without being in a fasted state."

David Sinclair · ▶ 1:33:46

"I take resveratrol... I take polyphenols from red wine and from vegetables either in a pill or in my food as a substitute."

David Sinclair · ▶ 1:51:48

metformin uses

"If I take metformin or the natural equivalent which is berberine... Taking it every other day, I think is better."

David Sinclair · ▶ 1:42:59

Berberine recommends

"If you don't want to take the drug, you can take berberine. That also activates this AMPK pathway."

David Sinclair · ▶ 1:43:04

Spermidine uses

"The reason that I take it is that it extends the lifespan of every animal that it's been given to from worms to mice. And it's a very safe molecule."

David Sinclair · ▶ 1:52:20

Glycine uses

"I take about 5 grams of glycine most days... it's very safe and again falls into the same category as spermidine. No downside."

David Sinclair · ▶ 1:53:31

Vitamin D uses

"I take a vitamin D supplement. Serena actually I take Serena's supplement because her vitamin D has vitamin K2 as well."

David Sinclair · ▶ 1:54:44

Vitamin K2 uses

"K2 is another vitamin that's important for longevity I believe because it keeps calcium out of your arteries which causes plaque."

David Sinclair · ▶ 1:54:51

Aspirin uses

"I take a baby aspirin every day... Someone like me, I believe it makes perfect sense to take aspirin every day."

David Sinclair · ▶ 1:55:09

Niacin uses

"I'm taking high-dose vitamin B3 or niacin... I'm taking half a gram. Some people take a gram. And that's one of the few things that's been known to bring down the levels of LP little A."

David Sinclair · ▶ 1:57:14

"We give them doxycycline. It's used for malaria. It's used for Lyme disease. And we're using it in this case to turn these genes on."

David Sinclair · ▶ 2:06:44

Mentioned (2)

Now We Are Six "This book is very important to me. And I didn't realize it, of course, when I was a kid, that thi..." ▶ 3:39
NR "There's another one called NR. NMN is directly converted into NAD" ▶ 1:20:07