Agouti

Not OP or a doctor or even a medical professional, but I personally can't see how that would help.

1: Materia migration in the gut is pretty strictly one direction: outwards. Bacteria grow and replicate in the upper gut and travel with food as it becomes feces, eventually exiting in the usual manner. I can't see how bacteria placed in the colon could make it upstream to take hold. (Edit: Apparently bacteria can migrate from the top of the colon through to the rest of the intestines, but I think this statement still applies for anything at the bottom of the colon like where a suppository would be placed by most people)

2: Lactase production (required to break down Lactose) typically occurs in the upper small intestine, pretty close to the stomach. Almost all mammals (and many people) stop or slow production of Lactase as they get older, meaning you can't directly process lactose. Instead, it is eaten by bacteria, creates methane, and causes irritation. Unless there is a specific bacteria in the treatment selected to process lactose without the usual byproducts I don't see how it would help. (Edit: is possible that improving overall gut health would reduce the effects of Lactose Intolerance, even if the intolerance is still there, so this point could also be wrong)

3: All oral tablets which are vulnerable to attack by stomach acid can be protected by the dissolvable tablet casing. Stuff doesn't spend that long in your stomach, and the pharmaceutical industry has worked it out long ago - many drugs don't like being soaked in hydrochloric acid, either.

Nothing above black gets broadcast.

I'm looking to do something very similar, so a few technical questions:

1) Did you buy the bike somewhere cheap or just take it with you from Australia?

2) How challenging was vehicle registration across borders? Did you need to keep it registered in the originating country?

3) Was an international SIM sufficient or did you need local SIM/satellite?

4) Any issues with poor quality fuel (thinking especially South America). I was planning on avoiding a modern high-performance bike because of concerns with low octane fuels.