Try Rogaine first since just starting. I use the equate brand from Walmart and i use the liquid. Its very cheap and should fill in the area but its effectiveness slows over time.
Who is this Dr.? PRP is not very effective and shampoo doesn't stay on your scalp to do much of anything. Haven't seen any results with dusteride mesotherapy. Way too young to get a hair transplant with this plan.
I played the same game and lost everything I had. My wife left me and took my dog and kids all because of your stupid game. Now the only women I can get are toothless hoes.
21 is old enough to start Finesterid for sure but like others have said you could start it now.
Just get the equate brand liquid at Walmart.
Apply it at night and then wash hair in the morning. You could try it once a day and see what happens.