How to Defy Death

April 7, 2025

AI Summary

5 min read

How to Defy Death

The cold plunge feels amazing. You jump in with a friend on New Year's Day, your body jolts awake, and you feel fantastic for the rest of the day. But that feeling has nothing to do with living longer. According to Timothy Caulfield, a professor and research director at the Health Law Institute at the University of Alberta, the evidence that cold plunges extend lifespan is essentially nonexistent. "The reality is there is no good evidence to suggest that cold plunges are going to have a dramatic impact on your health," he says. "And certainly there's no evidence to suggest it's going to help you live longer." The problem isn't that people enjoy cold water—it's that the longevity industry sells these practices as science-backed keys to defying death.

The Longevity Industry Is Wellness Repackaged

Caulfield has spent decades studying how health and science get represented in public culture, from product labels to social media misinformation. He sees the current longevity movement as essentially the same wellness culture that has existed for centuries, just dressed up in scientific language. In the 1700s, people did bloodletting. In the late 1800s, John Harvey Kellogg—the cereal magnate—became a TikTok-style wellness influencer promoting electric light bathing (lying in a box surrounded by lights) and three-gallon enemas. People flocked to his spa.

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What you'll learn

1 (00:55) **Do We Actually Want to Live Forever?** - The hosts open by questioning the appeal of extreme longevity, admitting exhaustion at 37 and fear of the unknown after death.
2 (01:56) **Wellness Culture Through the Centuries** - Timothy Caulfield explains that health trends are nothing new, from 1700s bloodletting to John Harvey Kellogg's electric light baths and three-gallon enemas.
3 (05:29) **What Biohacking Really Means Today** - The definition of biohacking has shifted from microchipping to using techniques, procedures, and supplements to "optimize" yourself.
4 (06:31) **Cold Plunges and the Supplement Industry** - Two popular biohacks are examined: cold plunges have no good evidence for dramatic health or longevity benefits, and the supplement industry is built on sketchy science and light regulation.
5 (08:49) **When Science-Backed Hacks Go Wrong** - Intermittent fasting is presented as an example of a practice with interesting animal and human studies that can also promote disordered eating.
6 (10:44) **The Power of the Placebo (and Joy)** - The hosts discuss the placebo effect, noting a Harvard study where even knowing you're taking a placebo didn't ruin its effectiveness.
7 (13:24) **Scienceploitation: How Hype Hijacks Real Science** - Caulfield explains how legitimate scientific language (like "stem cells" or "personalized") is used to sell questionable products, creating a "veneer of legitimacy."

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Show Notes

Humans have always tried to prolong life and battle mortality, but what do the current influx of biohackers reveal about this era of individual responsibility?

Timothy Caulfield, a professor and the research director at the Health Law Institute at the University of Alberta, studies how health and science are represented in the public sphere. The lines between wellness culture, longevity, and biohacking are beginning to blur, and Caulfield offers advice about how to dodge misinformation and unproven theories while still pursuing a long and meaningful life.

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