Welcome to HealthcareMagic. It looks like male pattern baldness
. Male pattern baldness is usually an inherited trait and men start losing hair at an early age leading to extensive baldnesss. Since the nutritional deficiency
is also a common cause of hairloss, patient is required to take food rich in protien, vitamins(mainly vit A and vit C) and other micronutrient
like zinc, iron and copper.
Medicines which are useful are minoxidil and finasteride. Finally one can resort to hair transplantation
Hope it helps you. Regards.