Is AI already replacing Doctors?
A Cardiologist Debunks Medical Myths (And Tech Hype)
“AI in healthcare is like teenage sex - everyone talks about it, thinks they should be doing it, and pretends they are even when they aren't."
That’s how Dr. Christopher Labos, Cardiologist, science communicator, and host of The Body of Evidence podcast , kicked off our conversation about artificial intelligence’s role in medicine.
In this week’s episode, we tackled everything from misleading health headlines to why your smartwatch isn’t as smart as you think, and yes, whether AI will actually replace doctors.
Watch this clip where Dr. Labos breaks down the AI hype
The Myth-Busting Cardiologist
Dr. Labos specializes in cutting through medical misinformation with a mix of rigorous science and wit. Some highlights:
Debunked Myths (And Why We Believe Them)
"Strawberries prevent heart disease!"
The truth: A study claimed a 27% reduced risk, but that’s relative risk. In reality, you’d need to force-feed 18,000 women strawberries daily for two years to prevent one non-fatal heart attack.
Why it spreads: Headlines ignore baseline risks. ("Doubling a tiny risk is still tiny.")
"Vitamin C cures colds!"
The truth: Only in ultra-specific groups (like Canadian soldiers on Arctic missions or Swiss ski-school kids). For everyone else? Nope.
Why it spreads: "Multiple hypothesis testing"—cherry-picking data from negative studies.
His book Does Coffee Cause Cancer? (a romantic comedy disguised as science) explores these myths further.
2. AI in Healthcare: The Real Talk
Will AI Replace Doctors?
Spoiler: No and Here’s why:
Liability issues: "If an AI misdiagnoses a stroke, who’s sued? The hospital? The programmer? Until that’s solved, humans are stuck holding the bag."
Useful vs. hype: AI excels at automating tedious tasks (e.g., flagging abnormal X-rays for radiologists) but fails at nuanced judgment.
Smartwatch limitations: "Your Apple Watch detects atrial fibrillation well—but its ‘sleep efficiency’ score is basically horoscope-tier."
Where AI Could Help (but obviously not limited to)
Sifting through records: Identifying high-risk patients buried in data.
Rural care: Assisting remote clinics where specialists are scarce.
Dr. Labos’s take: "AI will be evolutionary, not revolutionary. It’s a spell-check, not Shakespeare."
3. Weight Loss, Exercise, and the Unsexy Truth
"Exercise is terrible for weight loss."
Why? It’s far easier to not eat 300 calories than to burn them off.
The Ozempic lesson: New weight-loss drugs work because they reduce appetite not because they invent new physiology.
"The best workout? Whatever you’ll actually do."
Forget "optimization": The biggest health win is going from sedentary to moving.
Running myths: "It won’t ‘ruin your knees’ unless you’re doing it wrong."
Listen to the Full Episode
Spotify:
YouTube (with video):
What’s a health “fact” you believed for years, until science proved otherwise?
I’ll feature the best myths in a future post!