Poor digestion/weight loss. Unable to eat most foods due to gas. Limited to vegi diet - again only leafy vegis. All tests normal, docs can't understand.

Functional Approach. I would consider a detailed evaluation of your overall health, nutritional intake, as well as gastrointestinal health. A functional medical approach would likely uncover some issues in regards to your digestion and assimilation. An in depth stool analysis is a good place to start in regards to digestive issues. You might also benefit from seeing a gastroenterologist.