Which testshould i try..for food intolerance or for celiac disease?ive been having gut issues,mainly constipation,im on a plant-based diet,it cant be lactose intolerance,im trying to eliminate other foods..maybe ibs(?) tests are expensive help:?

It is not tests that you need as much as evaluate your diet and opt more for nutritional foods and increase your water intake. It is important to first know what celiac disease is before you make such diagnosis for yourself. Constipation may feature as part of IBS however the information you have given is inadequate and you should seek comprehensive evaluation for appropriate management.

Constipation has to be addressed first and your treating gastroenterologist would be best to make further recommendations. Physical activities, such as jogging or core exercises aside from lifestyle changes, dietary and stress managing techniques are key otherwise in the long run.

Celiac disease is not usually associated with constipation. You may take a fiber laxative like Metamucil and drink enough water daily so that your urine is colorless. For the long term you may try to increase your intake of fiber foods. Consult this site for fiber foods. http://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/high-fiber-foods/art-20050948

At this point, I would see your primary care doctor or a gastroenterologist and follow their lead. I would not try to second-guess what tests should go next, but leave it to the experts. It is impossible to know here based on your short description what the next step should be. Good luck.