Hi there, thanks for your comments. Regular use would use one bottle in much less than 4 months. But we have taken your point to the manufacturer who have replied: 'The batch you have has only been in stock with us for 3 months, the 12 months starts from production in Australia, then we ship the liquid to UK and bottle and label here, test it, then put into stock. So we really only sell with a 6-9 months expiry here because it is a new product made from 100% plants. As we are selling out each time we are ordering more, and once the first batch passes the 12 month mark, we are able to send the product for re-testing to increase expiry.' Hope this helps, Alex