At more northern or southern latitudes, the level of UVB rays hitting Earth’s surface decreases due to the planet’s tilt. UVB radiation catalyzes its creation in our skin.Īccording to Jablonski, “there is a conspicuous geographical pattern” between skin color and distance from the equator. With receptors located in the cells of many major organs and in the immune system, Vitamin D helps in calcium absorption and prevents aberrant cell division. Credit: University of California Press ( Get a 29% discount on this book from the NASW Bookstore on ). In her latest book, anthropologist Nina Jablonski describes the connections between skin color and Vitamin D.
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