Yes, Jax is right. You must first break down the components of the whole situation. What triggers the smell....how long it lasts...what makes it better...at what times of the day/night is the smell worse or better (I.E. how is it right upon waking up in the morning?)...... Do you notice a difference in the smell when your stomach is empty or when it is full....and do you happen to know where exactly the smell is being emitted from (skin, breath/mouth/nose, etc..)
Have you ever been tested for TMAU? There are definitely MANY things to at least TRY. For instance, the supplements; Chlorophyll, Zinc, Probiotics, Charcoal....
Do you notice if eggs make the smell worse? If so...that makes sense because eggs contain a huge amount of sulfur. and sulfur is typically linked with Body Odor . That goes for any sulfuric food.