logo
episode-header-image
Jul 16
1h 13m

The Problem with Modern Health Advice (T...

Tim Gray
About this episode

💬 “ We already know the biggest levers. Nutrition, sleep, movement, connection, sunlight—all of those things we've known about for decades and they're not sexy, but they work. Even novel gadgets are just an add-on to these big buckets." ~ Dr. Karan Rajan


In this episode, host Tim Gray sits down with NHS surgeon and social media phenomenon Dr. Karan Rajan to navigate the complex world where mainstream medicine meets online wellness culture. Dr. Karan shares his long history of making educational content and his mission to provide nuanced, evidence-based knowledge in a digestible format. Together, they dive deep into the tension between established medical practice and the biohacking movement, exploring how to remain grounded in science while staying open to innovation. Listeners will come away with a refreshing, balanced perspective on health optimization and the tools to separate science from fiction.


💡 Highlights

(0:00) Intro

(1:09) Welcome to Dr. Rajan

(1:12) Why an NHS Surgeon Started Making TikToks

(6:46) Why a Degree Doesn't Mean Someone is Always Right

(11:07) Bridging Mainstream Medicine and the Wellness World

(16:48) The "Big Levers" of Health vs. The Extra 1% from Biohacking

(20:47) The Dangers of Over-Supplementation & Protecting Your Liver

(26:48) Dr. Karan Reveals the Supplements He Personally Takes

(33:04) Mouth Taping: An Updated, Nuanced Stance

(44:06) A 3-Phase Plan to Support Your Gut Through Antibiotics

(52:44) Fiber vs. Fibers: Why Diversity is the Key to Gut Health

(56:24) The Debate on Blue-Blocking Glasses

(59:59) An Honest Take on Hydrogen Water

(1:03:51) Rapid Fire: Harmful Trends, Fixing the NHS, and Biggest Health Wins


Follow Dr. Karan Rajan for more evidence-based health education:

Instagram: https://www.instagram.com/drkaranrajan/ 

TikTok: https://www.tiktok.com/@dr.karanr 

YouTube: https://www.youtube.com/@DrKaran/videos 


Massive thank you to OMNi-BiOTiC for sponsoring this episode!

Most people think detox starts with your liver - but it actually begins in your gut. If your gut barrier is weak, your liver gets overloaded, fast. That’s why I’ve added OMNi-BiOTiC HETOX to my morning routine. It’s a probiotic powder delivering 15 billion bacteria from 9 scientifically tested strains, specifically selected to tighten your gut lining, balance cholesterol, and reduce the toxic load on your liver. The sachets are super easy to take, and it’s free from gluten, yeast, lactose and animal protein. Since taking it, I’ve noticed better digestion, clearer mental focus, and more consistent energy levels.

If you’re interested in detox, energy, or metabolic health, visit http://shop.omni-biotic.com and use code TIM for 20% off to give your gut the upgrade it deserves.


Hosted on Acast. See acast.com/privacy for more information.

Up next
Oct 3
How Stem Cells Just Became Available to Everyone | Dr Torbjörn Ogéus
💬 “This is what I found that’s going to blow the lid off the stem cell industry. I found a way to legally get over a hundred million of your own stem cells within a day.” - Dr. Torbjörn Ogéus. From his personal journey regenerating his own cartilage after career-ending osteoarth ... Show More
51m 21s
Sep 19
Why You’re Tired, Foggy, and ‘Hydrated’ (But Not Really) | Barton Scott
⚡️ Most people don’t just need “more supplements,” they need better absorption and the right ratios. 💬 “Test, don’t guess. And why I love hair testing… it’s not enough to just see, ‘Oh, look, I’m a bit low in selenium, copper, manganese, magnesium.’ It’s the ratios that drive th ... Show More
50m 12s
Aug 20
Chris Williamson on The Trade-Offs Behind Every High Performer
💬 “All of the stuff you’re most proud of, your strengths and the ways you have a competitive advantage, will often have a trade-off on the other side.” - Chris Williamson From sleep regularity and managing open loops to understanding hidden versus observable metrics, Chris Willi ... Show More
49m 24s
Recommended Episodes
Feb 2025
The Secret Molecule for Endless Energy | Dr. Andrew Salzman : 1253
Could a single molecule be the difference between vibrant longevity and early decline? Dr. Andrew Salzman—Harvard-trained physician, scientist, and creator of the first PARP1 inhibitor, Chief Medical Officer of Wonderfeel—joins Dave to reveal the real key to living longer, fighti ... Show More
1h 24m
Oct 2024
Unlocking the Secrets of Longevity with Dr. David Sinclair
In this episode of Longevity by Design, our host Dr. Gil Blander speaks with Dr. David Sinclair, a professor of genetics at Harvard Medical School, about the science behind aging and how we can extend both lifespan and healthspan. Dr. Sinclair shares his groundbreaking research o ... Show More
46m 23s
Jul 7
Unlocking the Power of NAD for Energy, Brain Health, and Longevity
Energize your life and rejuvenate at the cellular level with Mitochondriac, the ultimate mitochondrial rejuvenation supplement. Packed with powerhouse ingredients for optimal health, it's like getting the benefits of NAD in a convenient, family-friendly pill form. Dive in and tra ... Show More
34m 12s
Jun 2025
The Supplement That Reversed Aging in Human Trials, with Dr. Anurag Singh
On this episode of The Dr. Hyman Show, I sit down with Dr. Singh—Chief Medical Officer at Timeline and a pioneer in mitochondrial science—to talk about what’s really driving fatigue, muscle loss, and accelerated aging. Together, we break down the simple, science-backed ways to su ... Show More
1h 21m
Sep 2024
Longevity Scientist Shares Top Strategies for Improving Your Health Span w/ Matt Kaeberlein, PhD
Today’s show is brought to you by MYOXCIENCE Nutrition. In this episode Matt Kaeberlein, PhD, CEO of Optispan, discusses the significance of enhancing health span through interventions like rapamycin and highlights the role of senescent cells in chronic inflammation and age-relat ... Show More
1h 29m
Apr 2025
Conscious Bacteria? The Secret New Science of Cellular Intelligence | Zach Bush : 1275
What if mitochondria weren’t just energy engines — but conscious beings guiding your survival and evolution? In this episode, Dave Asprey sits down with Zach Bush, MD, to uncover a radical new science of cellular intelligence. Together, they reveal how your mitochondria, microbio ... Show More
1h 42m
Nov 2024
Neurologist: The Shocking ROOT CAUSE of Alzheimer’s - How To Prevent & REVERSE Damage To Your Brain | Dr. David Perlmutter
In today’s episode of The School of Greatness, I sit down with renowned neurologist and bestselling author Dr. David Perlmutter to explore the critical connection between metabolism and brain health. Dr. Perlmutter shares groundbreaking insights on preventing and potentially reve ... Show More
2 h
Jul 2024
The Healthy Ageing Doctor: Doing This For 30s Will Burn More Fat Than A Long Run! Sitting Is The Silent Killer! - Vonda Wright
Are humans destined to grow old and frail? With these ultimate ageing hacks you gain turn back the clock and transform your life Dr Vonda Wright is an orthopaedic sports medicine surgeon and host of the health and fitness podcast, ‘HOT for Your Health’. She is also the author of ... Show More
2h 8m
Aug 2024
Enhancing Muscle Quality and Longevity | Dr. Anurag Singh
Discover the groundbreaking science behind healthy aging in this episode of the Dr. Gabrielle Lyon Show! Join Dr. Lyon as she sits down with Dr. Anurag Singh, an MD PhD with extensive research in immunology, to explore the incredible benefits of Urolithin A, a compound that's sho ... Show More
1h 31m