Lynette McWilliams
I am well outside my area here, so I'm not sure if this is similar to what you are looking for. There is a community called IBD Superheroes foodies for people with Crohns disease and ulcerative colitis. It's rather small and has a little more than 150 recipes. There are also communities for medical diets I have never heard of. If you go to explore and try some searches checking the communities tab, you might find something. But one problem I have found with some of these niche communities is there are sometimes lots of members but few recipes.
