How your body smells can signal underlying disease. A great article on the BBC website is worth reading.
https://www.bbc.com/future/article/20250815-these-scientists-say-they-can-diagnose-health-problems-by-smelling-your-body
There are a whole range of disorders that can be picked up by smell. The stomach often has some bad bacteria that give off a Sulphur like smell. Shitake Mushrooms help fight this smell.