Take it every day
I have been taking this product for the past year. I am prone to Bronchial Asthma every winter. I have noticed since taking this product that when I do catch a virus I don't seem to take as long to get over it. I used to cough consistently throughout the winter and now I can get over a flu virus within weeks without the lingering cough. I do take extra if I feel I am becoming unwell and continue until I get better. I then resume my 1 tab daily, great product!