1. Applying sunscreen once in the morning and calling it a day does not cut it.
Sunscreen breaks down over time, so reapply every two hours to keep your skin safe, especially when you’re spending a lot of time in the sun. Physical sunscreens (ones that contain titanium dioxide or zinc oxide) will start working immediately, but chemical sunscreens will need about 40 minutes to soak in before they start to work.
Going to the Beach Anytime Soon? Take This Quiz First.