Science Says Sunshine Could Be Better Than You Think

Everything you learned about avoiding the sun might need an update. Science writer Rowan Jacobsen's new book "In Defense of Sunlight" presents surprising research showing that moderate sun exposure could benefit our health in ways we're only beginning to understand.

For decades, the message has been clear: stay out of the sun to avoid skin cancer. But Jacobsen discovered that sunshine was once considered powerful medicine, from ancient Rome to the 1920s when top medical journals championed its healing properties.

The fear began in the 1970s when skin cancer rates climbed. Early sunscreens blocked UVB rays that cause burns but let through UVA rays that can trigger melanoma, accidentally giving people false security to stay in the sun longer.

Modern broad spectrum sunscreens work better, and they've successfully reduced the most common types of skin cancer. Still, many scientists say evidence that sunscreen prevents melanoma remains unclear, and factors like genetics and childhood sunburns play bigger roles than previously thought.

Here's where it gets interesting. A study of lifeguards found that by summer's end, their sun exposed skin was enriched with beneficial microorganisms that actually protect against UV radiation. Every square centimeter of our skin contains millions of microorganisms, and some produce compounds that kill cancer cells while leaving healthy cells untouched.

The vitamin D story adds another layer. Rickets, a bone weakening disease in children, was nearly eliminated through vitamin D fortified foods and sun exposure. Now it's rising again among kids who spend too much time indoors.

Sunshine produces vitamin D naturally as a hormone that helps calcium strengthen bones. Skin cancer specialist Rachel Neale recommends regular short sun exposures with as much skin showing as safely possible, which led Jacobsen to suggest that "ten minutes of naked cartwheels in the backyard might not be a terrible idea."

Why This Inspires

This research doesn't mean tossing your sunscreen. It means rethinking our relationship with the sun and recognizing that humans evolved outdoors. The experts recommend balance: consider your skin type, the time of day, your location, and protect kids with clothing and shade. But those brief moments of sunshine on your skin aren't just pleasant. They're connecting you to the same energy source that makes all life possible.

As Jacobsen beautifully notes, without solar energy we'd be lifeless. Instead, we're conscious beings animated by light itself, experiencing the universe in real time.