Summary
Dr. Greg Bailey, a former emergency room physician turned biotech entrepreneur, discusses the science of slowing aging and regenerating organs. He covers his transition from clinical medicine to longevity research, the math behind drug development, and why health span matters more than simply extending lifespan.
Key Points
- Healthspan (years lived in good health) is a more meaningful target than lifespan, since extending life without quality creates suffering.
- Organ regeneration research is advancing rapidly, with partial reprogramming of cells showing promise in animal models.
- The economics of drug development mean most longevity interventions will need to work through existing FDA pathways for specific diseases.
- Fasting and ketosis activate cellular repair pathways (autophagy, AMPK) that overlap with the mechanisms targeted by longevity drugs.
- Biotech approaches to aging focus on senolytic drugs (clearing senescent "zombie" cells) and NAD+ precursors to restore mitochondrial function.
- Lifestyle interventions (sleep, exercise, fasting) remain the highest-impact, lowest-risk longevity tools available today.
Key Moments
So ketones are related to acetone, which is nail polish remover
So ketones are related to acetone, which is nail polish remover. So you can imagine the work that it had to be go into it so that Luke could enjoy it in a glass of water without the colorful things that people say about ketones online.
"So ketones are related to acetone, which is nail polish remover. So you can imagine the work that it had to be go into it so that Luke could enjoy it in a glass of water without the colorful things that people say about ketones online. So there's two ways to go into ketosis."
That's a whole different issue
Do you know about the study that was done at UCLA in 2018 where they gave people two drugs, three supplements and using Horvaz, DNA clock, they were able to within one year at two, not two years off their biological age.
"Do you know about the study that was done at UCLA in 2018 where they gave people two drugs, three supplements and using Horvaz, DNA clock, they were able to within one year at two, not two years off their biological age. So yeah, so it was Greg Fahey was the, and it was growth hormone which I don't recommend. That's a whole different issue."
Time Restricted Eating: Your chance of having a positive proof of concept
You get basically about 20 times increase in your number and so that made sense to me, but you can't do one drug because you have a 70% chance of failure.
"your chance of having a positive proof of concept on retrospective eight year study is 30% and if it's for an unmet clinical need and it's for a large market and it's best in class or first in class, you can deliver an extraordinary return. You get basically about 20 times increase in your number and so that made sense to me, but you can't do one drug because you have a 70% chance of failure."
You have Alzheimer's last 20 years of your life
You have Alzheimer's last 20 years of your life. I mean, that's that's the thing.
"more important than absolute allowing you to live to 120, but you're in a wheelchair. You have Alzheimer's last 20 years of your life. Right. Right. I mean, that's that's the thing. There's so many parts about being a protoplasmic being that just wear down. I mean, I think about just mobility and your joints over time, no matter how healthy your hearty your brain is. I mean, there's just the physical structure of the body seems to get worn out."
