Hair in Catagen and Telogen phases can't be completely destroyed because
laser can't act on.
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Catagen- this phase is also known as the transitional phase,
when hair begins to stop growing;
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4
Hair in Catagen and Telogen phases can't be completely
destroyed because laser can't act on their root effectively.
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During the Catagen period, your hair stops growing
and the outer root sheath shrinks and the root of the hair is cut off from its blood supply and from the cells that produce new hair.