Dairy Sensitivity in Breastfed Infants

If your breastfed baby cries inconsolably for several hours a day he could have colic.  Babies are labeled as having colic if they cry for more than 3 hours a day, at least 3 times a week, and this crying lasts for more than 3 weeks.  Doctors aren’t really sure what causes colic, but they think that colicky babies are just more sensitive.  Their digestive systems are immature and their nervous systems aren’t used to the new world around them.  They may need more attention while they adjust to life outside the womb and get used to all their new bodily functions.

Colic is sometimes a catch-all diagnosis for babies that are fussy and cry a lot.  There are a few things that can be mistaken for colic in breastfed babies because they cause the same symptoms.   These include foremilk-hindmilk imbalance, overactive letdown, and allergies to something in their mother’s diet.  Dairy is the most common food allergy for babies.  Some babies are very sensitive to the proteins found in cow’s milk. 

Dairy Allergy Symptoms

Some symptoms your baby might have if he is sensitive to dairy are:

  • Gassiness, gas pain or abdominal discomfort
  • Crying, fussiness, or colic-like symptoms
  • Green stools, mucus stools, or stools with blood in them
  • Diarrhea or constipation
  • Spitting up or vomiting
  • Coughing, congestion, or cold-like symptoms
  • Skin rashes
  • Eczema
  • Diaper rash

Dairy Allergy or Lactose Intolerance?

When people think of milk allergies they often think that an allergy is the same thing as lactose intolerance.  People with lactose intolerance have trouble digesting lactose, a type of sugar found in milk.  Lactose is in all milk including human milk.  Lactose intolerance occurs when a person doesn’t produce enough lactase, the enzyme that breaks down lactose. 

Babies’ bodies are designed to drink milk.  Breast milk contains about 7 percent lactose.  Lactose is a carbohydrate (sugar) that your baby’s body uses for energy.  About 40 percent of your baby’s caloric needs come from the lactose in your breast milk.  A lactase deficiency is unusual in infants.  Lactase production decreases after the age of 2 or 3, when babies no longer need to digest milk.  This is why most people do not develop lactose intolerance symptoms until they are adults. 

Sometimes a baby will have symptoms of a lactose intolerance because he is taking in more lactose (from mom’s breast milk) than his body can digest, but this is not related to a mom’s dietary intake of lactose.   This can happen when there is a foremilk hindmilk imbalance or if mom has an oversupply of breast milk. Mom’s intake of dairy products does not affect the amount of lactose in her breast milk.

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