My daughter has food allergies and she has been taking Pinecone Extract as well. I spoke to them about the allergy problem and I was told that others have had success with food allergies when taking the extract. We have not tried any foods yet that have a reaction, they recommended to have her on the extract for about a month before experimenting.
For me I have not had any irritation from Pinecone Extract , it has in fact been kind to my stomach. I have not experienced any other side effects. I actually searched for any known side effects and there have been none I've seen yet.
I actually came across that link as well! Some very useful information.