I dont see why they would. I went to new zealand with mine via LA in July last yearand they were fine. If you are concerned take a photocopy of the consent form that your doctor signed and email the company you are flying with to let them know. I signed to say that i was taking food into the country but it didnt come in the catagories they were concerned about. The customs guys asked me what i had brought in, i showed them the packs and they had no worries about it at all.