I have heard about this a lot also, but the marshmallow trick has never worked for me. I still eat them though, because they are yummy....especially roasted!
DX:6/12 Mild UP:got/kept remission w/1 Canasa nightly
MAJOR Flare began end of 11/12
Flex Sig 12/14/12:UC,mod/severe left side
Flex Sig 2/4/13:UC Severe into transverse colon
Prednisone refractory,little to no relief from enemas or Remicade
Proctocolectomy w/end ileostomy 3/13/13
Pathology showed Severe Chronic UC into right colon
Finally off Pred as of 4/24/13
So far my new,healthy life is GREAT!