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How to properly apply sunscreen
If you are only using a few meager droplets of sunscreen on your face, then you are greatly compromising the UV protection. The Rule of Nines is a convenient and easy way to ensure that you are applying the correct amount of sunscreen.
The Rule of Nines divides the surface area of the body into eleven approximately equal areas, each representing 9% of the total. Each area needs to be covered by 2 fingers worth of sunscreen to achieve the standard 2mg/2cm’2 of testing concentration.
Squeeze and rub the sunscreen from the base of your index and middle fingers to their very tips. Then apply this quantity to *each* area. It’s extremely important to apply the full amount, otherwise you are compromising your sun protection and operating under a false sense of security. Don’t be stingy with your sunscreen, slather it on!
- Face and neck: 1 area
- Both arms: 2 areas
- Upper front and back: 2 areas
- Lower front and back: 2 areas
- Both upper legs: 2 areas
- Both lower legs: 2 areas
A standard 100 ml (3.4 oz) bottle of sunscreen, applied daily on face, neck and hands, only lasts around 26 days, that’s less than 1 month. So if your little bottle of sunscreen “lasts forever”, then UV light is still damaging your skin, and you don’t even know it.
Download the original PDF file written by Dr. Steve Taylor.
