DOES IT WORK? Home Tests for Food Sensitivities

Wondering which foods are making your belly hurt? These tests claim to sort it out.

- STEPHANIE ANDERSON WITMER

If you feel bloated or nauseated after eating, say, ice cream or pasta, you may have a food sensitivity or intolerance. These are pretty common and usually happen because the body is missing an enzyme to help it properly digest lactose, gluten, or other food proteins, says Hayley Miller, a senior registered dietition nutritionist at Persona Nutrition in Denver. (A sensitivity is different from a food allergy, in which the immune system mounts a responsehives, itching, swelling, stomach pain, or even anaphylaxisto a food it sees as a threat.)