Marmite is the English version. Yukky pommy shit.
Vegemite is an aquired taste. You need a very small scraping on toast and you are in heaven. Gotta love savoury spreads
Folate (or Folic Acid) is an additive in alot of foods because of it's value in stopping certain birth defects (I think). It's in bread and cereals in many western countries. Not sure why they would ban it for that.