Eidon sulfur does not contain sulfites and is hypoallergenic. Take the guesswork out of supplements: eidon uses a proprietary process that transforms pure mineral crystals into a fully hydrated, 100 percent bioavailable liquid ionic supplement. The eidon difference: large doses are used in solid supplements because most of the mineral is not absorbed. Eidon minerals are 100 percent bioavailable. It is not necessary to take large doses in order to be effective.