Link?
Factoid?
I eat tomatoes like mad.
If we get a good local produce year I eat them for a month straight as my primary food.
Now the last time my GI doctor went up with the big rubber hose and took pics for my educational self care he did not go into a shock and awe over tomato skins.
And if ya really want to get graphic........
(grin): For all you and the doctor know, your entire GI tract may be one long tomato skin protecting you from ulcers and invasive bugs.