Dr. Matthew Walker

from tablets and screens. And there was a great study from Harvard that indicated certainly one hour of blue light exposure before bed blunts something called melatonin, which is this bioactive nighttime hormone, which signals sleepiness. And it certainly did that. And it disrupted sleep.

And we were all on the good bus of blue light is, you know, the nefarious agent that will, you know, fleece you of your sleep. Then came along some great work by a guy called Michael Gradazar. And he actually argued now, I think very powerfully, it's not the blue light. It's that these devices are attention capture devices, right?

And we were all on the good bus of blue light is, you know, the nefarious agent that will, you know, fleece you of your sleep. Then came along some great work by a guy called Michael Gradazar. And he actually argued now, I think very powerfully, it's not the blue light. It's that these devices are attention capture devices, right?

And we were all on the good bus of blue light is, you know, the nefarious agent that will, you know, fleece you of your sleep. Then came along some great work by a guy called Michael Gradazar. And he actually argued now, I think very powerfully, it's not the blue light. It's that these devices are attention capture devices, right?

And they are designed to ruthlessly fleece you of your attention economy. And my goodness, are they good at doing it, because they've spent hundreds of millions of dollars developing that technology. And as a consequence, you become so cerebrally activated that it masks your state of sleepiness.

And they are designed to ruthlessly fleece you of your attention economy. And my goodness, are they good at doing it, because they've spent hundreds of millions of dollars developing that technology. And as a consequence, you become so cerebrally activated that it masks your state of sleepiness.

And they are designed to ruthlessly fleece you of your attention economy. And my goodness, are they good at doing it, because they've spent hundreds of millions of dollars developing that technology. And as a consequence, you become so cerebrally activated that it masks your state of sleepiness.

So you could be saying, okay, if there was an electromagnetic blast that came through Austin at 11 p.m. at night, you would normally say, look, I'm not sleepy until midnight. And I just don't feel sleepy right now because I'm on my phone and you're getting activated. All of a sudden that goes out within 10 or 15 minutes, you actually get hit by this wall of sleepiness and you think,

So you could be saying, okay, if there was an electromagnetic blast that came through Austin at 11 p.m. at night, you would normally say, look, I'm not sleepy until midnight. And I just don't feel sleepy right now because I'm on my phone and you're getting activated. All of a sudden that goes out within 10 or 15 minutes, you actually get hit by this wall of sleepiness and you think,

So you could be saying, okay, if there was an electromagnetic blast that came through Austin at 11 p.m. at night, you would normally say, look, I'm not sleepy until midnight. And I just don't feel sleepy right now because I'm on my phone and you're getting activated. All of a sudden that goes out within 10 or 15 minutes, you actually get hit by this wall of sleepiness and you think,

Jesus, actually, I'm pretty sleepy. Because it hits the mute button on the signal, the physiological signal of sleepiness, because it overdrives it with activation.

Jesus, actually, I'm pretty sleepy. Because it hits the mute button on the signal, the physiological signal of sleepiness, because it overdrives it with activation.

Jesus, actually, I'm pretty sleepy. Because it hits the mute button on the signal, the physiological signal of sleepiness, because it overdrives it with activation.

Well, I mean, the converse, which is pretty easy. I think that you're so right as well, that there is something triggering about, activating about that kind of use. You're involved, it's engaging, you're sort of thinking about stuff. It's kind of passive, but boring at the same time, but also engaging. Very interesting.

Well, I mean, the converse, which is pretty easy. I think that you're so right as well, that there is something triggering about, activating about that kind of use. You're involved, it's engaging, you're sort of thinking about stuff. It's kind of passive, but boring at the same time, but also engaging. Very interesting.

Well, I mean, the converse, which is pretty easy. I think that you're so right as well, that there is something triggering about, activating about that kind of use. You're involved, it's engaging, you're sort of thinking about stuff. It's kind of passive, but boring at the same time, but also engaging. Very interesting.

But I used to use it if I was stuck in traffic or whatever, and I was tired after driving back, I would make sure I had a really compelling YouTube video on. So I would use that effect on the opposite side. You would reverse engineer it. Yes, it'd keep you awake. Exactly correct.

But I used to use it if I was stuck in traffic or whatever, and I was tired after driving back, I would make sure I had a really compelling YouTube video on. So I would use that effect on the opposite side. You would reverse engineer it. Yes, it'd keep you awake. Exactly correct.

But I used to use it if I was stuck in traffic or whatever, and I was tired after driving back, I would make sure I had a really compelling YouTube video on. So I would use that effect on the opposite side. You would reverse engineer it. Yes, it'd keep you awake. Exactly correct.

Quick note, talking with Matthew really drives home how much our overall health depends on the basics, like getting a good night's rest, which is why I've been prioritizing tracking my health more closely. And Function has made it unbelievably easy to get a clear picture of what's happening inside of my body. They run lab tests twice a year that monitor over 100 biomarkers.