Does the ‘Cold Cap’ actually prevent hair loss in chemotherapy?

I have prescribed it for a number of family members. It is a cooling head system that keeps the blood circulation to the scalp low during chemotherapy. On the three family member I recommended using it, none of them lost all of their hair although there was some thinning on one woman with Breast Cancer Chemo, but unlike many of her friends, she kept almost all of her hair for the entire...

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