LIGNOSUS10 promo code will give you 10% off. Also their shipping is free with all orders. I have used this company before, having ordered a 3 month supply. Wasn't sure if it was actually doing anything but the studies appear to be promising. I have just re-ordered a 3 month supply as I've had two exacerbations this year. Also am trying to stick to an anti-inflammatory diet. I would love to hear if it is helping.