Having solved all other problems:

The United States has slapped a ban on Vegemite, outraging Australian expatriates there.

The bizarre crackdown was prompted because Vegemite contains folate, which in the US can be added only to breads and cereals.

Now, I've never tried the stuff myself, but from everything I've read or heard vegemite is an... acquired taste. However, I have it on good authority that the stuff is reasonably popular in Australia. One would think that, if it really were all that dangerous, we would have more reports of, say, two headed Australian babies and whatnot.

Welcome to technocratic regulation at its finest! Coming soon to a Congress near you!