How Mexican experts diagnose and treat cow's milk protein allergy in young children
What it found
Twenty pediatric specialists agreed on a step-by-step plan for finding and treating cow's milk protein allergy in children under 2.
They recommend breastfeeding when possible, special formulas when it is not, and avoiding unnecessary tests.
What they found
When to suspect an allergy
The experts agreed that colic alone is rarely caused by cow's milk protein allergy. But if a baby keeps spitting up despite changes in feeding or thickeners, or has constipation that does not improve with usual care, doctors should consider this allergy as a possible cause.
Choosing the right formula
If breast milk is not available, the panel recommends extensively broken-down cow's milk formulas as the first choice. About 90% of babies tolerate these well. Rice-based formulas are another option, and the arsenic levels in a typical daily amount of 600–800 ml are 10 times lower than World Health Organization limits.
Soy drinks versus soy formula
Fortified soy infant formulas can work as a second choice if a baby refuses the bitter taste of other special formulas. However, the experts warn that regular soy drinks sold in stores do not meet a baby's nutritional needs and should not be used.
How long to avoid milk proteins
The group advises keeping cow's milk proteins out of the child's diet for at least 6 months, or until the child is 9 to 12 months old. For children who had severe immediate reactions, this avoidance period may stretch from 12 to 18 months. After that, baked milk products might help the child build tolerance faster.
Supplements for breastfeeding mothers
Mothers who stop eating dairy to help their allergic baby should take extra vitamin D and calcium. The experts suggest 400–800 IU of vitamin D and 1000 mg of calcium each day. They also stress checking labels to make sure these supplements do not contain hidden cow's milk protein.
What the authors conclude
- They developed a practical guide to help doctors in Mexico find and treat cow's milk protein allergy in children under 2 years old without ordering unnecessary tests.
- Their recommendations encourage breastfeeding whenever possible and suggest using special hypoallergenic formulas when breast milk is not available.
- They believe following this guide will lead to better health outcomes for babies and a more efficient use of medical resources.
How it was done
Cow's milk protein allergy is the most common food allergy in babies, but diagnosing it can be difficult because symptoms often look like normal baby tummy troubles. The authors wanted to create a practical guide tailored to how healthcare works in Mexico.
A group of five doctors led the project and invited 20 pediatric specialists from across Mexico to take part. The experts answered a 38-item questionnaire about diagnosis and treatment over two voting rounds between November 2022 and January 2023. They reviewed research published in the last 10 years to shape their answers.
What it can’t tell you
- This work gathered expert opinions rather than testing treatments directly on patients, so it cannot prove which approach works best in practice.
- The advice was built specifically for the healthcare system and dietary habits in Mexico, so it might not fit perfectly in other countries.
- Because many past studies did not record whether babies were breastfed, scientists do not yet know exactly how feeding methods change the results.
Who paid
- Conflicts
- All authors declare that they have no conflicts of interest.
- Authors work at
- Instituto Nacional de Pediatria, Mexico City; Hospital del Niño DIF, Hidalgo México; Hospital General Agustín O Haran, México
The paper
- Title
- Mexican consensus on cow's milk protein allergy
- Type
- Study
- Summarised from
- Full text
- Cite
- Alfonso RMJ, Rubí IAK, Manuel TME, et al (2024). Mexican consensus on cow's milk protein allergy. Allergologia et immunopathologia. doi:10.15586/aei.v52i1.958Free full textPubMed 38186191DOI
Summary written 30 Sep 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error