I have heard of this in different ways:
"..How long will IBD last? IBD is a lifelong (chronic) condition. A few patients find their disease becomes milder (“burned out”) after age 60, but many do not..." University of Michigan
"...Ulcerative colitis characteristically waxes and wanes. Many patients experience long remissions, even without medication. Ulcerative colitis may mysteriously resolve ("burn out") after a long history of symptoms..." Medicine.net
"...The disease can burn itself out after a period of time in some people..." Queens University Ontario
There are many similar, vague references to this which I've seen in different articles throughout the years.
Please share any specifics - the golden ticket on how to get there would be appreciated