DHT blocking shampoo's and other family members.

[HLTtdc4412]

Say a person had a DHT blocking shampoo in a family bathroom. if other males used a DHT blocking shampoo or someone who is not balding used this shampoo, would they eventually build up a tolerance to substances like ketoconazole and it's other ingredients. Also, would this person experience shedding and if they experienced shedding would the hair grow back normally?

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Also would if a young male did this would it help prevent hairless down the road?

 

[br1]

Won't do any harm, as these shampoos do close to nothing anyways.