The Hidden Power of Heat: How Sauna May Reduce Heart Disease, Alzheimer’s & Depression with Bill Gifford

Dhru Purohit Show

Dhru Purohit

Alternative Health, Medicine, Health & Fitness

4.7 • 3.6K Ratings

🗓️ 27 April 2026

⏱️ 91 minutes

🔗️ Recording | iTunes | RSS

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Summary

This episode is brought to you by Sunlighten. Heat isn’t just about comfort; it’s a powerful biological signal that can reshape your health from the inside out. When used intentionally, it may unlock benefits for your heart, brain, and mood that most people overlook. Today on The Dhru Purohit Show, Dhru sits down with New York Times best-selling author Bill Gifford to explore the powerful and often overlooked role of heat in human health and longevity. Bill breaks down how sauna use may reduce the risk of heart disease, Alzheimer’s, and even depression, while offering practical, real-world guidance on how to use heat safely and effectively. This conversation goes beyond trends, unpacking the science of heat therapy, its cultural roots, and how simple habits can profoundly impact long-term health. Bill Gifford is the co-author of the New York Times bestsellers Outlive and Spring Chicken: Stay Young Forever (Or Die Trying). A veteran magazine writer and editor, he is deeply interested in extraordinary athletes and cutting-edge health science. He is a longtime contributing editor at Outside, and his work has appeared in Wired, Bloomberg Businessweek, Men’s Health, Bicycling, Slate, and The Best American Sports Writing. In this episode, Dhru and Bill dive into: (0:00) What if heat is the missing key (0:28) The shocking Finnish data (2:14) Ancient ritual to modern science (4:21) The moment heat changed Bill’s life (7:14) Why cultures prioritized sweating (11:31) Slashing your risk of heart disease (19:07) Heat for sleep, mood, and depression? (29:24) The Alzheimer’s link (34:09) “Mommy proteins” and brain cleanup (36:02) How to sauna for your body (38:35) Why humans evolved to sweat (54:52) Amplifying the benefits of exercise (56:25) The cost of constant comfort (1:07:22) Sauna do’s and don’ts (1:22:10) The numbers that change everything (1:26:23) The basics most people miss (1:28:50) Where to go deeper Also mentioned in this episode: Hotwired: How the Hidden Power of Heat Makes Us Stronger Try This: 4 Fascinating (and wild) Things I’ve Come Across This Week For more on Bill, follow him on X/Twitter, Instagram, LinkedIn, or visit his Website. This episode is brought to you by Sunlighten. Right now, Sunlighten is offering exclusive savings for my community. You can save up to $1,900 plus free shipping when you go to sunlighten.com and use the code DHRU when you fill out the Get Pricing form. Sign up for Dhru’s Try This Newsletter Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

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0:00.0	Bill, today you're here to talk to us about your new book, Hot Wired, and the Hidden Power of Heat,
0:09.1	something that most of us have been taught to avoid, but that actually may be one of the most
0:15.7	powerful tools for improving our cardiovascular health, resilience, and even longevity.
0:22.8	Before we get into some of the fantastic stories in your book and the backstory,
0:27.9	I want to kick off today's podcast with some of the most exciting top line data around the power of heat.
0:36.9	And to me, when I read your book, that is the Finnish studies. Some groundbreaking work over, I think, 20 plus years that's been there. Can you talk to us about those studies to sort us off and what they found? Yeah, sure. So, you know, for a century, people in the physiology
0:59.8	and medical world talked about heat as something that was always dangerous, right? And then in 2015,
1:07.7	a cardiologist in Finland named Yari Laukonen dove into some data from a big heart disease study that they had done in rural Finland, or they had a terrible problem with men dying of sudden heart attacks.
1:21.1	And there were a bunch of lifestyle factors that these guys were asked about.
1:25.0	And Laukenin zeroed in on sauna sauna use because I think he likes sauna himself.
1:30.1	And he noticed that the men who did sauna like every day did it the most frequently and actually
1:37.7	stayed in there the longest had about a 50% or more reduction in these fatal heart attacks. So that problem was cut in half.
1:49.2	All cause mortality cut by half roughly. And then this just jumped out of the data.
1:57.1	But like heat is actually potentially beneficial for these guys.
2:02.0	So Heat could be, like, a therapy and not just something that was dangerous.
2:05.8	Totally changed the conversation around Heat.
2:08.1	And so that's what got me going, like, oh, my gosh, like, I got to, I got to dive into this and see what's happening.
2:13.4	Well, it partially got you going because you were part of a team that co-authored a book.
2:18.4	You're the co-author of Outlive, a number one New York Times bestseller.
2:22.0	And in your introduction for your new book, you write how when you guys came across some of that data,
2:27.8	you were scratching your heads and debating about whether or not to include it.
2:31.7	And ultimately, you decided that you'd present the information,
	...

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