New Research: We Got Sun Exposure All Wrong (And It's Massively Hurting Our Health)

November 4, 2026

AI Summary

5 min read

Two weeks before recording this episode, host Liz Moody received a melanoma diagnosis. A stage-zero melanoma was removed from her chest, and she was left with a question that most of us have been taught to answer with a simple yes: Did sun exposure cause this? Science journalist Rowan Jacobson, who spent a year as a night science journalism fellow at MIT researching the full-body effects of sunlight, argues that the answer is far more complicated—and that the public health message to avoid the sun at all costs may be doing more harm than good.

The Two Truths and a Lie That Upend Everything

Jacobson opens with a provocative game. Which of these three statements is false? (1) Outdoor workers have lower rates of melanoma than indoor workers. (2) Women who seek sun exposure are less likely to die than women who avoid it. (3) People with dark skin still need to wear sunscreen every day.

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What you'll learn

1 (00:02) **Host's Personal Entry & Guest Introduction** - Liz Moody reveals her recent melanoma diagnosis and introduces Rowan Jacobson, an MIT science journalism fellow whose book challenges conventional sun-exposure wisdom.
2 (01:46) **Two Truths and a Lie: The Opening Challenge** - Rowan presents three counterintuitive statements about sun exposure, revealing which are true and which is false.
3 (03:58) **Why Sun-Seeking Women Live Longer** - Rowan explains the mechanisms behind the Swedish study's finding that sun-seeking women have better longevity.
4 (05:34) **Melanoma Deep Dive: Liz's Personal Case** - Rowan analyzes Liz's melanoma in the context of the broader science, separating risk factors from bad luck.
5 (08:40) **Age, Skin Type, and Sunscreen Necessity** - Rowan explains how risk changes with age and skin tone, challenging universal sunscreen recommendations.
6 (10:21) **The Hidden Danger: Visible Light and Free Radicals** - Rowan reveals that sunscreen only blocks ultraviolet rays, but visible light also causes significant damage.
7 (12:43) **The New Sunscreen Ingredient: BEMT** - Rowan discusses the newly approved sunscreen ingredient that offers broader protection.

+ Full timestamped outline available in the app

Show Notes

Two weeks ago, I got the scariest phone call of my life. I had cancer. It was melanoma. I love the sun so much, but did my sun exposure put my life at risk? This is what I was grappling with when I discovered Rowan Jacobsen's new book, In Defense of Sunlight, which basically flips everything that I have ever heard about sun exposure on its head. It says we’re all treating the sun, and sunscreen, completely wrong.

Rowan Jacobsen was a Knight Science Journalism fellow at MIT, which put him in the rare position of getting to research the science of the sun on every aspect of our health.

You’re going to learn the real science behind sun exposure, sunscreen use, preventing heart disease, autoimmune diseases, depression, anxiety, and more.

🎧 What you’ll learn:

• The 4 major ways the sun impacts your overall health

• The 6 skin types and how to approach the sun with each

• The truth about Vitamin D supplements

• The shocking study showing smart light bulbs reduced depression

• Why you actually shouldn't stress over blue light

• Why being among trees is essentially free red light therapy

Check out the previous episode of The Liz Moody Podcast discussed today:

“Should Everyone Be On GLP-1s? + Other Longevity Secrets Your Doctor Won't Tell You”

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