In your baby’s first year, you’re learning what works for them and what doesn’t. This is when they might show signs of a food allergy or intolerance, as their immune and digestive systems are still developing. It’s important to know the difference between the two. Food intolerance affects the digestive system. It means your baby has trouble digesting a certain food. Symptoms include gas, bloating, diarrhea, and stomach pain. These symptoms are uncomfortable but not life-threatening. A food diary can help identify the problem. Food allergies involve the immune system. The body treats certain foods as threats, releasing antibodies and histamine. Symptoms can range from hives, itching, and swelling to severe reactions like anaphylaxis, which requires immediate medical attention. Common allergens include milk, eggs, peanuts, and shellfish. Diagnosis involves reviewing symptoms and history, and possibly blood or skin tests. Breastfed babies rarely react to breast milk itself, but might react to cow’s milk in the mother’s diet. Formula-fed infants might react to milk or soy in formula. Hypoallergenic formulas are often recommended. Always consult your pediatrician for guidance.