the most common cause of hairloss is androgenic alopecia
if your father has same problem then you have a very high chance of getting it
but there is no permanent cure for it.
if its due to other causes like lack of nutrition, stress
then it can be prevented.
take good balanced diet. take more proteins
. lot of water
add more green leafy vegetables in diet. take more fruits
have good sleep atleast 7 to 8 hrs.avoid stress.use mild shampoo.