Don't worry, your not alone, I had one know it all tell me that as my grandad also had ulcerative colitis it was obviously caused by a bad family diet. I have never lived with him so how the hell she worked that one out I'll never know. She was right with the family link tho, as I have hereditary UC, not diet linked in any way. I just learnt to agree with everyone and their stupid suggestions and stopped talking about
it to anyone, then they couldn't bug me!!!
To me it was the easiest way out, they soon learnt to shut up, and if the old diehards kept on I blinded them with information from the specialist!!
Good luck, Heather