I have the horrible smell all the time. Just like glamma55 it's on my towel, panties, and sports bras after I work out. Thought it was coming from my stomach since I do have Gerd and reflux. Had ulcers and stage C esophagitis. Took PPI's for awhile while they healed but after being on them for many years I read about too many side effects. Also thought maybe smell was off from Covid but that was several years ago. The fact that I smell it from clothing makes me think it's not breath however finally pressing my husband he says he doesn't smell it on my body but occasionally on my breath. I have a very low carb diet and seems like only thing I can eat without stomach problems is meat and I eat probiotic whole milk plain yogurt. I can't digest fruits or vegetables. Had food allergy testing and avoid the foods I have allergies to. Very frustrating! Think our sex life is being impacted but husband doesn't want to hurt my feelings! I also read on the Mayo site that a person that a brain tumor had a bad smell all the time!