We know the importance of sunscreen in preventing skin cancer. But can any sunscreens cause cancer themselves? Elizabeth Buchbinder, MD, senior physician at Dana-Farber Cancer Institute, helps address recent safety concerns regarding sunblock by tracing the evolution of sunscreen from classic zinc blockers to modern-day chemical sunscreens. Have a question about cancer risk and prevention? Comment below or email us at communication@dfci.harvard.edu. We'll try to address your question in a future