Yknow how if you leave a blanket or table cloth or tshirt, or the paint on the outside of your house, or pretty much anything colorful, outside in the sun for a really long time it starts to fade?
Light/radiation can break down pigment molecules.
Laser hair removal is basically blasting the pigment molecules in your skin so they break up, and the remnants are then washed away and filtered out of the blood stream
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