HELLO, is 5% minoxidil recommended for a 18yearold guy around scale 1 (just start to lose some frontal hair) (btw, hisfather, grandfather are bald?

Minoxidil. 5% minoxidil is only recommended if the doctor who saw you prescribed this medicine. If not, pl;ease make an appointment to see your primary doctor. You might also go to the library and read what you can about Minoxidil.