by 
The Curious Bag
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<h4 class="dechead">On One Hand: Baldness is Genetic
In normal hair growth, a hair grows, is shed from the follicle and a new hair begins to grow. An as-yet-unidentified gene makes some people produce disproportionate amounts of the hormone dihydrotestosterone, which causes hair follicles to shrink, making them incapable of producing new hair. The result is baldness.
On the Other: Hair Products Can Cause Damage
Hair spray can make hair stiff, sticky or too dry. When this happens, brushing or combing can sometimes make hair break off. Hair can look thin or even have bare patches.. Unlike baldness, this type of hair loss is not permanent because the follicles will continue to produce new hairs.
Bottom Line
Permanent baldness happens because of genetic factors. It is caused by an internal process. Applying hair products externally can create temporary hair loss or thinning but is not a source of permanent baldness.
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