How Safe Is Sunscreen?

Image Kim Chambers, a champion open-water swimmer, covered with lanolin and zinc in 2016.CreditJason Henry for The New York Times Skin cancer is the most common malignancy in the United States, affecting more than three million people each year. Using sunscreen is one mainstay of prevention. But the recent news that sunscreen ingredients can soak…

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Nutrition for One? Scientists Stalk the Dream of a Personalized Diet

A decade ago, spurred by the success of the Human Genome Project and the affordability of genetic sequencing, scientists began to explore the promise of “nutrigenomics.” Could personalized nutrition, informed by knowledge of an individual’s DNA, help prevent and even treat diet-related diseases? The results of early studies from Harvard, Stanford and elsewhere were compelling:…

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