Let me explain as follows:
Actually there are many factors cause hair fall.
Pore clogging on scalp, Genetic cause and Health condition and so on.
This Hair Fall control shampoo is aimed at cleaning and conditioning scalp,
so as to prevent hair fall.
And 1 survey sample is for 3~4 times use.
We believe after using 3~4 times, users can feel their scalp is cleaner.
That is a sign of the shampoo protecting hair from falling.
Regards to how many times a bottle can be used,
the hair fall shampoo contains 250ml in one bottle,
for semi long hair, normally use 8ml for one time,
which means one bottle can be use for 1 month (31 days).
It depends on how long the hair is.