There is HOPE!!! And things can better quickly
Gluten free certainly may eliminate many problems including Body Odor or at least significantly help with Body Odor related to digestion disorders. There is something else that needs to be considered however. Fructose and fodmaps. I will not discuss the details of that unless you have specific questions. I will say though that when gluten free diet helps but you test negative for celiac, there is a very similar digestive issue that mimics celiac. Fodmaps and especially fructose malabsorption. The reason why gluten free helps is that gluten and fodmaps go hand in hand. Most gluten has fodmaps but many non gluten foods have fodmaps also though.
If I could share this.
Switch to gluten free deoderants like Schmidts rose or bergmot/lime
Gluten free and fodmap restricted diet. ( It's doable and there's lots to eat)
I saw amazing results in just days.
I also eliminated gluten in skin and hair care products. It's everywhere.
Do remember if you have been using traditional aluminum deoderants, your armpits have to go through a detox period when switching to natural deo. But most importantly, remember, this is fixable. You can have a normal life