780: Mitochondrial Health, Peptide Protocols, and The Truth About NAD+ with Dr. Elizabeth Yurth

Beauty Bytes with Dr. Kay: Secrets of a Plastic Surgeon™

Kay Durairaj, MD, FACS @beautybydrkay

Business, Fashion & Beauty, Health & Fitness, Arts, Management & Marketing, Medicine

4.9 • 608 Ratings

🗓️ 19 November 2025

⏱️ 52 minutes

🔗️ Recording | iTunes | RSS

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Summary

In this power-packed episode, I sit down with longevity expert Dr. Elizabeth Yurth to dismantle popular biohacking trends and get down to the cellular root of aging. We dive deep into why mitochondrial dysfunction is often the culprit behind chronic fatigue—especially post-viral exposure—and Dr. Yurth walks me through her safety-first "replacement strategy" for cycling peptides like Thymosin Alpha-1, BPC-157, and GHK-Cu to restore what we naturally lose with age . We also have a critical conversation about the NAD+ craze, where I learn why filling the "bucket" with infusions might be fueling inflammation if we don't block the leaks first using compounds like Apigenin . Finally, we explore the game-changing role of plasmalogens for insulating our nerves against brain fog and why we are moving away from Metformin to protect our muscle gains .

Guest Information: Dr. Elizabeth Yurth is the Medical Director of the Boulder Longevity Institute. You can find her educational resources at bli.academy and on Instagram @DrYurth.

Transcript

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0:00.0	Well, hello, hello, guys, you're listening to Beauty Bites with Dr. K, secrets of a plastic surgeon,
0:19.9	and today's podcast, you're not going to want to
0:22.1	miss if you're a biohacker, if you're into longevity and wellness, this is my queen. It's Dr.
0:27.6	Elizabeth Earth. Welcome to the podcast. Thank you, Kay. Feelings are mutual to those of you guys.
0:34.0	Kay and I have known each other for not that long with time, but we came fast friends.
0:37.7	And I love the opportunity to talk to you and your brilliance.
0:40.9	It's so fun.
0:41.8	I feel like everything you teach me, I'm trying to play clinically and vice versa.
0:45.8	Like the things I see clinically, we can teach back.
0:48.9	Yeah.
0:49.3	Yeah.
0:49.6	What's your favorite new thing that's trending and happening right now? What are you diving
0:55.4	deep into in longevity at the moment? Well, I really am sort of passionate about trying to
1:02.3	understand mitochondria more. We kind of got into this realm with the long COVID people, right?
1:09.4	And unfortunately, even those of you who think you might not be long COVID,
1:13.3	almost everybody unfortunately got adversely affected by COVID or the spike protein.
1:18.3	And we're seeing a lot of mitochondrial damage that occurs.
1:21.6	So people are just fatigued more easily.
1:23.9	You know, their energy wasn't what it was.
1:25.8	Their endurance isn't what it was. That along with probably
1:30.7	a lot of other stress and things that we're dealing with in the world. We're just seeing a decline
1:35.7	in mitochondrial function. We actually do some testing of mitochondrial function. And universally
	...

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