Everything you need to know about sunscreen this summer

(Health.com) -- New FDA rules are helping ensure that we get the protection we pay for, and with skin cancer on the rise (one in five Americans will develop skin cancer in the course of a lifetime), these changes can't come soon enough.

Key fixes: Sunscreens will be labeled "water resistant" (as opposed to waterproof or sweatproof); they can no longer be called "sunblocks" (as it overstates their effectiveness); and they can no longer claim to provide instant sun protection or to last more than two hours without reapplication.

On top of that, sunscreens can be labeled "broad spectrum" only if they protect equally against UVB (the main culprit of skin cancer) and UVA rays, which cause aging.