I recommend taking 40,000 IU beta-carotene and 800 IU vitamin E during the summertime. Rest assured that these doses are completely safe. In fact, I recommend taking 800 IU vitamin E year-round for its overall protective benefits. Don't Forget the Sunblock Daily beta-carotene and vitamin E will help protect your skin, but supplements alone cannot prevent sunburn and sun damage. During intense sun exposure, be sure to wear sunblock.
Most sunscreens block out only UV-A rays.