4. Sunscreen starts working right away.
The Skin Protection Factor (SPF) in sunscreen works by creating a chemical layer that binds to your skin. But, this process doesn’t happen instantaneously. This is why you should apply your sunscreen about 20 minutes before you expose yourself to UV radiation.
5. Certain sunscreens provide complete protection.
Whether a sunscreen provides complete protection depends upon the type of sunscreen you use and how you apply it. Only use sunscreens that are labeled as being “broad spectrum,” that is, they protect against both UVA and UVB rays, and that are SPF 30 or higher. Also, learn to apply the sunscreen correctly.
Read Related: 15 Myths About Sunscreen that Need to be Smeared
