you can take it 5-6 months.. they are just vitamins and hair supplements... but that alone will not be enough to get hair regrowth. Hair loss is a progressive problem and if not tackled in time tends to keep worsening over time. There are various causes of hair fall. Read my health feed for a better detailed understanding. https://fit.practo.com/#!/content/28405 After reading this I hope you will be convinced that a proper thorough examination of your scalp from a qualified dermatologist will be advisable for a fruitful outcome. There are various treatment options available for improving hair loss- apart from medical management other supplemental procedures like microneddling and PRP which can be used to achieve good results. Get an online consult privately with pictures or meet a dermatologist directly for a proper evaluation of the condition. Hope this was helpful.