Penn State news by
Penn State's student blog



PSU Scientists Determine Why We Tan

Now that summer’s kicked into high gear, your skin is probably darker than normal, maybe even just an incidental tan. Hopefully it’s less than certain Mid-Atlantic youth of Italian extraction. Regardless, researchers at Penn State have actually come up with a new theory as to why our skin tans in the first place.

A study in the Department of Anthropology has found new reasons for the darkening of human skin pigments. This all goes back to evolution. In mid-to-northern latitudes where we live, the amount of ultraviolet B radiation that come in contact with our skin varies dramatically between seasons. UVB rays produce Vitamin D, and tanning is a natural mechanism for avoiding a deficiency of the nutrient. In fact, the researchers even found a connection between a Vitamin D shortage and the dark shade of skin pigments in those lacking. While UVB can also harm folate, needed for cell growth, when radiation levels drop, however, this allows for more production of Vitamin D and protects the folate.

This goes against previous theories, which, according to Penn State anthropology professor Nina Jablonski, “focused on the protective effects of melanin against sunburn, skin cancer, and overproduction of vitamin D.”

So I suppose the Jersey Shore hooligans are not off the hook when it comes to skin cancer. Though they certainly were always on it for every other kind. They can give a nod to Dear Old State next time they go for a nice bronzing, and so can you.

Read the full report here.


Your ad blocker is on.

Please choose an option below.

Sign up for our e-mail newsletter:
Support quality journalism:
Purchase a Subscription!

About the Author

Dan McCool

Dan is a senior and has been writing for Onward State since January 2010. Did you miss him? Nah, neither did we. He's returning after a semester abroad in England and will be serving as Arts Editor. Favorite things in life include references to The Big Lebowski.

No. 12 Penn State Men’s Lacrosse Secures 15-14 Come-From-Behind Overtime Victory Over No. 9 Yale

After scoring only two goals in the first half, TJ Malone and the Nittany Lions came back to win in sudden death overtime.

Penn State Men’s Hockey Edges Ohio State 2-1 In Regular-Season Finale

Dane Dowiak’s two goals guided the Nittany Lions to win a close game in Columbus.

Penn State Hoops Blows Lead To Minnesota In 75-70 Road Loss

The Nittany Lions coughed up a 23-point lead in the final road game of the regular season.

Follow on Another Platform
Other posts by Dan

Erase Your Expectations: Dan McCool’s Senior Column

Don’t worry about what you should be doing, or how what you’re doing is going to fit into the cadre of college—or Penn State, for that matter—predetermined by our culture. Go make your own Penn State, without any expectations; you’ll be much happier.

After Condom Spat, UPUA Approves Funding for Sexual Violence Prevention & Awareness Month

UPUA Is Walking to Harrisburg, Not Much Else