I have been living with this for many years. There is a test called Trio Smart breath test. It detects hydrogen sulfide in the breath. The 2 other volatile sulfur components are methyl mercaptan and dimethyl sulfide. It will not detect these. But at least it will show you there is something wrong. Also I went to the national breath center and they performed oral chroma test where they showed I have high levels of all 3 volatile sulfur compounds.