My daughter has constant stomach pain and diarrhea and is losing weight. she blood panels done and came back negative. we've cut gluten, what could ?

Hard to tell: In this type of forum with very little information, it is hard to determine the cause. Daughter's age? It is good to start ruling out possible items which you have apparently done with gluten. Could she be lactose intolerant? You may want to stop all dairy and try almond milk or use lactaid. Please seek out physician assistance and guidance. Good luck.

More info: Probably needs a specialist. Have stool cultures for infection been done?What type blood work?Details help us decide if more can or needs done.It could be infectious, dietary, or inflammatory such as colitis. I suspect, unfortunately, that more testing is needed.

Abdominal pain/diarr: If your daughter has constant abdominal pain, diarrhea, and weight loss, this could be many reasons and needs further work up. She had blood work done. I'm not sure what labs included. She should have abdominal/pelvic ct, stool studies, and possible colonoscopy. Suggest to see a GI doctor.