There are few products with andrographis (creat). This one has more than most. It has been the best cold and flu preventative I have found in my (many) more than 50 years. Taking them at the first sign of a cold and the cold either doesn't happen or is very mild. There are not a huge number of stockists, so looking on the internet including for the best deal is a requirement. We always re-order on the internet when down to the last box.
Reasonably priced, especially on the internet, very effective for myself and family.
Not a large number of stockists about.