Oh it is invasive alright! Sometimes, depending on who's giving the shot, it can be pretty painful as well. Combine a nurse/doc without a lot of patience, and B12 right from the fridge... ouch.

No discussion whatsoever.

Yeah, I was thinking about that when I wrote that I was feeling better a week or so ago. It's a huge effect indeed, and it's still being studied.

Well, the rules are a bit funky to be honest. For a 1000mcg injection, you need a prescription. However, for a 10,000mcg injection, you can get it OTC. Don't ask me why, nobody here was ever able to explain it to me.

FWIW, most docs here have not heard about hydroxocobalamin, let alone methylcobalamin. There's also a big difference between EU countries.

Also, my pharmacy drew a blank when I asked for some epsom salt. Even when I said "magnesium sulfate" there was just some head shaking.