Dr. Peter Attia
speaker
5,258 appearances
36 recordings
6 series
first heard Jan 2024
last heard Jun 2025
Dr. Peter Attia’s voice in public audio — every appearance, attributed to the second.
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So it's the equivalent of the Brazilian butt procedure for the testes. Yeah.
Medicare approved? No. Creatively approved. So let's shift gears and talk about other modifiable factors. Let's talk about heat. We've talked about it a little bit. So for fertility. Yes, for fertility. So tell me about the impact of cold plunging and sauna and hot tubbing on fertility for men. Okay.
They overheat. So you get into a 105 degree hot tub, which is a very typical temperature for a hot tub is 105 to 110. You're saying within a relatively short period of time, your testes will assume that temperature. You're 70% liquid. This is right at the surface.
So fertile men. Yep. Trying to conceive. Yeah. These are men who are not able to conceive. You're making the diagnosis. I think it's your hot tub. Let's get you out of there. And they have a six-fold increase in sperm count. Total model sperm count, meaning count motility, mainly driven by motility.
Yeah, what's the LD50?
There have to be a lot of guys out there who are spending at least three times 20 minute sessions in a hot tub that's at least 104 degrees a week.
So my friend was absolutely right to have those ice packs on his scrotum. I think he's reading. Yeah. He's a smart guy. The Turk protocol.
They work optimally. Okay. Let's talk about exercise. You mentioned one example of exercise that can be problematic, which was, I believe you said in a study where men were ramped up to two hours a day of exercise that was above 80% of VO2 max, which is pretty strenuous. That's right. That was enough to put a dent in their fertility. Tell me about riding a bicycle. I'm a biker.
Yeah, Brooks leather saddles.
But what was the control group? Did they have a control group of runners? I don't remember. I don't think so. So in other words, it could have been the exercise. It could have been the intensity of their exercise.
So even if they were taking some hit off the bike, it was probably more than compensated for by their healthy lifestyle, which included probably riding the bike. But obviously there's a healthy user bias because anybody who's riding their bike to work is probably consuming less Guinness, fewer fish and chips, smoking less.
In other words, riding a bike is a proxy for being healthy, but in spite of that, it didn't offset that health risk, unless we found people who were equally healthy who didn't ride a bike.
That's because it's a leather saddle and it fit to you. Yeah. Iconic. Okay, let's talk about alcohol specifically, and let's talk about any other recreational drugs.
Any evidence that it's having an epigenetic effect? Probably. I don't know about evidence, but I'm sure it does. Let's talk about common recreational drugs. Let's start with marijuana.
And we think that that's causal? I don't know. It just worries me. Weed worries me. Interesting, given that it otherwise seems kind of benign. I personally can't stand this stuff, but I know so many people that use it so frequently that seem to have relatively few effects.
I'm not saying that one is driving stoned is good, but there are probably far fewer people that die at the hands of a stoned driver than a drunk driver. Probably.
What do you think is the mechanism of action by which THC is having these negative fertility impacts? Not sure. I don't think it's the mechanism.
So you can get low testosterone, but it's not been that profound. What about nicotine, either synthetically or in the form of tobacco? Bad actor at high doses, I think, too. Either one? Yep.
It's the oxidants that do it. It's oxidizing things. You mentioned diabetes earlier as part of your history and physical. What is it about diabetes? Is it the high levels of glucose? Is it the microvascular damage? Is it the inflammation that typically travels in parallel with it? Why is type 2 diabetes a risk factor for infertility?
What's the physical finding you're seeing in the testes that tells you, like, you know how an ophthalmologist will often make the diagnosis because they're looking into the eye?
Showing 161–180 of 5,258 · page 9 of 263
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