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Cow's Milk Protein Allergy

The most common food allergy in infants develops against cow's milk proteins.

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Çocuk Sağlığı ve Hastalıkları department. Book Appointment →

What is Cow's Milk Protein Allergy?

Cow's milk protein allergy (CMPA) affects approximately 2–3% of infants and is caused by an exaggerated immune response to casein and whey proteins in cow's milk. Both IgE-mediated (immediate-onset) and non-IgE-mediated (delayed, predominantly gastrointestinal) forms exist.

In breastfed infants, CMPA may develop against peptides that pass into breast milk through the mother's consumption of cow's milk. In this case, eliminating dairy products from the mother's diet serves as both diagnosis and treatment.

Most CMPA cases begin to be tolerated between ages 1–3. However, in children with severe IgE-mediated allergy, tolerance may develop later or may be permanent.

Symptoms

Vomiting and colicky crying after feeds
Bloody or mucusy stools
Diarrhea and inadequate weight gain
Eczema or urticaria
Nasal congestion and wheezing
Anaphylaxis (in severe IgE-mediated cases)

Risk Factors

Family history of atopy or food allergy
Personal atopic dermatitis
Lack of breastfeeding (some protective effect)
Male sex (mild predominance)
Early exposure to cow's milk
Birth by cesarean section (microbiome difference)

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Bloody stools, exudative eczema, or growth failure during feeding
  • Recurrent vomiting or rash after milk-based formula
  • Suspected anaphylaxis — emergency
  • Allergology evaluation before planning re-exposure

Treatment Methods

01
Breastfed infant: elimination of milk and dairy from the mother's diet (4–6-week trial)
02
Formula-fed infant: switch to extensively hydrolyzed formula
03
Severe cases or allergy-based septic-like presentation: amino-acid-based formula
04
Calcium and vitamin D supplementation for the mother during elimination
05
Re-exposure (challenge): every 6–12 months to monitor tolerance
06
Prescription of an epinephrine auto-injector in severe IgE-mediated cases

Which Department to Visit?

You can visit our Çocuk Sağlığı ve Hastalıkları department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

Learn About Çocuk Sağlığı ve Hastalıkları Department

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.