And it may be illegal in Australia, but here in the states you can buy it from Amazon, healthfood stores, and even most pharmacies.
Sulphur is a key ingredient in most of our cellular processes and been hugely reduced in our food supply ever since agri-business went to petro chemicals for fertilizing in the 80's. Therefore we're all deficient which is one reason insulin levels are so out of control.
Organic sulpher crystals are better and more potent than MMS (no heat is applied in processing) but also quite a bit more expensive. Hopefully organic sulphur crystals aren't also illegal in Australia.