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Choose sunscreen: In addition to the SPF, why should you pay attention to the PA index?
There are two systems used to measure the protection of sunscreens against UV rays: SPF (sun protection factor) is a measure of the UV protection used in sunscreens and PA (protection grade of UVA) is a measure of the UVA filtering ability of sunscreens. Understanding what SPF and PA are will help you choose a sunscreen that is more suitable for your needs.
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Cardiology Pediatrics Orthopedics