I'm also be interested in how this can affect a change of gut biome. Ie if a biome is partly responsible for diet cravings, would something like this help you restart your biome and put you in a better position to maintain?
I suppose it could? The issue is that people can conceivably just eat small portions of unhealthy foods. It would certainly be a boost if they were willing to make an effort though, get some serious fiber in there, find a good yogurt, that sort of thing.
Then again I once knew someone who went through the pain and cost of a gastric bypass, which she then ironically bypassed by drinking melted ice cream. It all comes down to the patient.