Dr. Martin Picard

Okay.

And I think what we discovered is that hair graying, at least temporarily, is reversible.

This was surprising because it goes against this notion that aging is a linear process that...

Just happens over time, no matter what you do.

And here we should know, actually, a hallmark of aging, which is, you know, depigmentation, losing color in your beard and your hair.

It's something that happens to almost everyone, but at different, you know, stages of life and so on.

And then on the same person, and the reason we got into this was that this felt like the perfect experiment.

Every hair has the same genome.

They're all genetically identical twins, right?

And they're all exposed to the same exercise regime, the same food, the same stress levels, yet some hairs go gray when you're like late 30s, and then some hairs go gray when you're like in your 80s.

What the hell's happening?

If we could figure this out, maybe we can understand why different people age at different rates.

Because it's very clear that there's no more than 10% of how long you live that's genetically driven.

Like the best studies put this at around 7%.

7% of longevity is genetically inherited maybe, and then about 90% is not.

Welcome to the Huberman Lab Podcast, where we discuss science and science-based tools for everyday life.

I mean, even physicists don't agree on what energy is.

And there's been debates, you know, Richard Feynman, who was like this amazing science communicator, physicist, said like, we don't even know what energy is and what's the best way to define it.

Because there are all of these forms, thermal energy, heat, right?

Light energy, electromagnetic, kinetic energy, movement, speed, right?