Maternal dietary antigen avoidance during pregnancy or lactation, or both, for preventing or treating atopic disease in the child.
Level 1 - systematic review of randomized trials
Cochrane systematic review and meta-analysis of randomized and quasi-randomized trials
PubMed 22972039 · doi:10.1002/14651858.CD000133.pub3
What was done
A Cochrane systematic review assessed randomized or quasi-randomized trials evaluating maternal dietary antigen avoidance during pregnancy, lactation, or both. The objective was to determine effects on maternal and infant nutrition and on the prevention or treatment of atopic disease in children. Searches were conducted via the Cochrane Pregnancy and Childbirth Group's Trials Register through July 2012. Multimodal interventions with non-dietary or non-breastmilk manipulations were excluded.
What was found
Five trials (952 participants) found no protective effect of maternal dietary antigen avoidance during pregnancy on infant atopic eczema incidence during the first 18 months of life. Dietary restriction during pregnancy was associated with a statistically significantly lower mean gestational weight gain, alongside non-significant increases in preterm birth risk and non-significant reductions in mean birthweight. Data for allergic rhinitis/conjunctivitis and urticaria came from single trials insufficient for inferences, with no long-term outcomes reported. Two trials (523 participants) found no significant protective effect of lactation antigen avoidance on 18-month eczema incidence or positive skin-prick tests at 1, 2, or 7 years. One crossover trial (17 lactating mothers) found a non-significant reduction in eczema severity for infants with established disease. Exact numerical estimates were not reported in the abstract.
Why it matters
Eliminating common food antigens during pregnancy does not prevent child atopic eczema and risks adverse nutritional effects such as reduced maternal weight gain. Routine dietary antigen restriction during pregnancy or lactation is not supported by current evidence for allergy prevention.
Limits
The review is limited by a small total number of included trials, particularly for lactation interventions (two prevention trials and one 17-mother treatment trial). Specific risk estimates, numerical weight values, and confidence intervals were omitted in the abstract. Long-term child outcomes and non-eczema allergic manifestations remain inadequately evaluated.
Cited by
- contradicts A mother's diet directly affects the composition of her breast milk and can impact infant eczema.