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MOSCOW, RUSSIA - JUNE 18: Two Chile fans take a selfie photograph on their phone prior to the FIFA Confederations Cup Russia 2017 Group B match between Cameroon and Chile at Spartak Stadium on June 18, 2017 in Moscow, Russia.

Taking a selfie may not seem fun to watch from someone else’s perspective but it may be good for you. Apparently taking a selfie can boost your confidence of course and taking pics in general can be good for yourself.

Here’s what the study states: Sensors on smartphones can “capture red light reflected from hemoglobin under our skin, which permits TOI to visualize and measure blood flow changes.” Using this technology, researchers were able to measure the blood pressure of 1,328 people from a two-minute video of their faces on an iPhone.

According to a press release