What Is The Importance Of Dihydrotestosterone -DHT And How Does It Relate To Propecia and Brain Fog?

I am curious to know the importance of DHT, post puberty. Is it only significant for men to sexually develop during puberty? Also, is it important for cognitive activity in any way? I ask this second question due to ‘brain fog’ being a reported (although rare I believe) side effect of finasteride.

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Dihydrotestosterone (DHT) is one of the many hormones responsible for secondary male characteristics during puberty such as body hair (facial, pubic hair) growth and deepening of the voice. DHT is one of the contributing factors in prostate enlargement as men age. Thus, DHT blocking drugs (Proscar: finasteride 5mg) is sometimes used to treat certain prostate related conditions. DHT is also one of the contributing factors in Male Pattern Balding (MPB) for those who have the genes for MPB. Thus, DHT blocking drugs (Propecia: finasteride 1mg) is used to treat MBP. It is unclear how it may affect cognitive activity but you may read on the Internet that men taking DHT blockers have reported “brain fog” on rare occasions. It is also important to note all drugs have side effects and every patient need to understand the risks and benefits before starting treatment.