Asked for female, 33 years old from Chandigarh
Selenium is just a specific medicine for a specific type of hairfall, it may work or may not work. Selenium 1000ch is a high potency not recommended to be taken frequently without a doctor's prescription.
In homoeopathy there are many medicines for hairfall. Also there are many reasons for hairfall. Better to consult a qualified homeopath get your hairfall type diagnosed and then only take the prescribed medicine. It will be more effective than to take any medicine on your own haphazardly.