Please choose the correct ending to complete the given sentence: Health: [header] How to diagnose food intolerance [title] Pay attention to the timing of your symptoms. [step] If you have a food intolerance, you won't see a reaction to the food you eat right away. A food allergy will result in a more immediate reaction.

Ending1: [substeps] Digestive symptoms caused by a food intolerance usually come on gradually over the course of a couple of hours. A food allergy usually results in symptoms almost immediately. Ending2: [title] Avoid water near food that you are allergic to. [step] This includes processed, baked, and microwave foods. Ending3: You may experience another food allergy at any time of the day, but your symptoms will usually take over within an hour or two. [substeps] Make sure you contact your doctor if you have an unexpected food allergy. Ending4: Look for some swelling, redness, or taste loss. This may indicate that there is something wrong with your food.

Answer format: ending1/ending2/ending3/ending4