Food Allergy vs. Food Intolerance It’s pretty common to have a reaction to a certain food, but in most cases it’s an intolerance rather than a true allergy. Why does it matter? Although they may have similar symptoms, a food allergy can be more serious.

These clues can help you figure out if it is an allergy or intolerance. A doctor can help you know for sure.

Food Allergy:

• Usually comes on suddenly
• Small amount of food can trigger
• Happens every time you eat the food
• Can be life-threatening

Food Intolerance:

• Usually comes on gradually
• May only happen when you eat a lot of the food
• May only happen if you eat the food often
• Is not life-threatening

Gluten-Free Diet for People With Gluten Allergies or Celiac Disease