The Coriander/Cilantro (f317) IgE test measures your body's allergic reaction to coriander/cilantro by checking for specific antibodies called IgE. This test is done in a lab and helps Providers figure out if you have a food allergy. It's especially useful when other tests might not be suitable, like if you have skin conditions, have taken certain medicines recently, can't do skin tests, or if there's a high risk of a severe allergic reaction.