I'm 20 and my moustache is not growing in the middle part. (Photo)

Hello Dave, Augmenting the frontal hairline and filling in the temples is one of the most common types of hair transplants.  I would recommend recommend 2,000 to 2,200 grafts to accomplish coverage of the areas indicated.  If you are looking to achieve the density in the imaged enhanced v...

It is normal to lose up to 100 hairs a day.  If you are concerned about hair loss one suggestion would be to see a doctor for a recheck.  You may be experiencing shock hair loss but there is no way to tell on the Internet. 

Erectile dysfunction and medications for erectile dysfunction will not affect your hair transplant results.

It is best to ask your surgeon about post operative care as each doctor has their unique regimen. There should be no issue with taking vitamin C.

Normal hair density allows for about half the hairs to be taken from a donor area without it being obvious that they were removed. If your hair loss is rapid or unstable, it can be difficult to know how many donor hairs are appropriate to take for grafting. If you have future hair loss, you...

It is best to ask your surgeon about post operative care as each doctor has their unique regimen.  Phentermine itself does not cause loss of grafts.