Cow's milk allergy in babies: symptoms, formulas, and milk alternatives

Cow's milk protein allergy (CMPA) is one of the most common food allergies in infants, affecting approximately 2 to 5% of babies. The good news is that most children outgrow it by the age of two. In the meantime, appropriate management is essential, as undiagnosed or untreated CMPA can lead to significant discomfort and complications.

ALLERGY VS. INTOLERANCE — WHAT'S THE DIFFERENCE?

These two conditions are often confused:

• Cow's milk protein allergy involves the immune system, which reacts to milk proteins (such as casein and whey) by producing antibodies.
• Lactose intolerance is a digestive issue caused by a deficiency of lactase — the enzyme needed to break down lactose, the sugar found in milk. Both can cause similar symptoms, but an allergy typically affects multiple body systems, while intolerance is usually limited to the gut.

SYMPTOMS OF COW'S MILK PROTEIN ALLERGY

Symptoms can appear in various systems:

1. Digestive: colic, reflux, vomiting, abdominal pain, diarrhea, mucus or blood in stools
2. Skin: dry or itchy skin (especially in skin folds, cheeks), eczema, hives, persistent cradle cap
3. Respiratory: runny nose, chronic cough, wheezing, recurrent ear infections
4. Behavioral: irritability, disturbed sleep, loss of appetite, frequent crying If your baby exhibits several of these symptoms, consult your pediatrician.

TREATMENT: IT ALL STARTS WITH DIET

The main treatment involves eliminating the allergen from the diet. If you are breastfeeding, your doctor may recommend removing cow's milk products from your own diet, as proteins can pass into breast milk.
If your baby is formula-fed, a specialized formula is necessary. Always choose an allergy-specific formula in consultation with your pediatrician or allergist.

TYPES OF FORMULAS FOR COW'S MILK ALLERGY

Partially hydrolyzed (HA) formula: For babies from families with a history of allergies, as a preventive measure. Milk proteins are partially broken down, reducing the risk of an allergic reaction.

Extensively hydrolyzed whey-based formula: For babies with confirmed allergy symptoms. Proteins are broken down into small peptides. Generally well-tolerated and quite palatable. Used under medical supervision.

Extensively hydrolyzed casein-based formula: For more severe allergic symptoms. Less likely to cause reactions than whey-based formulas. Has a more pronounced taste and odor, but most allergic babies accept it.

Amino acid-based (elemental) formula: For severe cases where hydrolyzed formulas have not helped. Proteins are completely broken down into free amino acids. The least palatable but most hypoallergenic option.

Soy-based formula: Not recommended for babies under 12 months. Cross-reactions with soy protein are common in babies with CMPA, and the phytoestrogen content in soy can affect the hormonal development of young infants. Always consult a specialist before using a soy-based formula.

DAIRY ALTERNATIVES FOR OLDER CHILDREN

If your child does not outgrow their allergy, here are some alternatives to cow's milk:

• Almond milk — rich in vitamin E, good fats, and minerals, including calcium.
• Coconut milk — good source of vitamin C and good fats; coconut water is a natural electrolyte drink.
• Rice milk — contains vitamins E and B6, magnesium, and fiber; naturally sweet and mild.
• Soy milk — rich in protein and potassium, but note that it can also trigger allergic reactions in some children with CMPA.

Always check labels for added sugars and ensure alternatives are fortified with calcium and vitamin D for growing children.