Vasodilation: Warm water makes your scalp vessels open and dilate which may increase absorption of topicsl products. It doesn't truly open pores. Cold water causes constriction of blood vessels.
Answered 5/3/2019
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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