Which statement about exclusive breastfeeding is supported by evidence?

Which statement about exclusive breastfeeding is supported by evidence?

• A. Exclusive breastfeeding for at least 4 months reduces infection risk.
• B. Breast milk is an excellent source of vitamin D, iron, and other essential nutrients.
• C. Breastfeeding for 9 months or longer reduces incidence of food allergies.
• D. There is a decreased risk of atopic dermatitis in babies who nurse for 12 months or longer.

Answer: (A)

Exclusive breastfeeding provides immune protection in infancy because breast milk contains antibodies, immune cells, antimicrobial proteins, and compounds like human milk oligosaccharides that help shape the gut microbiome and strengthen the gut barrier. This protection translates into fewer infections during the early months, and evidence shows that exclusive feeding for about 4 months or longer reduces the risk of common infections such as diarrhea and respiratory illness. While many guidelines aim for about 6 months of exclusive breastfeeding, the finding that 4 months or more lowers infection risk is well supported. Breast milk isn’t an excellent source of vitamin D or iron. Vitamin D supplementation is recommended for most breastfed infants, since breast milk supplies only small amounts, and iron needs outpace what breast milk alone provides as babies grow. Thus that part of the statement isn’t accurate. Regarding food allergies and atopic dermatitis, the data are not consistently supportive of strong, long-term protective effects from extended exclusive breastfeeding, so those statements aren’t as reliably backed by current evidence.

Exclusive breastfeeding provides immune protection in infancy because breast milk contains antibodies, immune cells, antimicrobial proteins, and compounds like human milk oligosaccharides that help shape the gut microbiome and strengthen the gut barrier. This protection translates into fewer infections during the early months, and evidence shows that exclusive feeding for about 4 months or longer reduces the risk of common infections such as diarrhea and respiratory illness. While many guidelines aim for about 6 months of exclusive breastfeeding, the finding that 4 months or more lowers infection risk is well supported.

Breast milk isn’t an excellent source of vitamin D or iron. Vitamin D supplementation is recommended for most breastfed infants, since breast milk supplies only small amounts, and iron needs outpace what breast milk alone provides as babies grow. Thus that part of the statement isn’t accurate. Regarding food allergies and atopic dermatitis, the data are not consistently supportive of strong, long-term protective effects from extended exclusive breastfeeding, so those statements aren’t as reliably backed by current evidence.