Det är ingen myt.
Det har inte varit någon myt heller.
Man började observera det redan 1929.
Ett tag menade man att det bara var för att barnen fick bättre uppfostran. Caregiving.
Even after the differences in socioeconomic status were accounted for or eliminated in these studies, breastfed children still clearly come out ahead.
In fact, one study showed that premature infants who were breastfed had significantly higher IQs than formula fed babies, and when babies were fed a combination of breast milk and formula, their cognitive scores were directly related to the amount of mother’s milk they received.
A new study out of Boston, published in the AMA Journal of Pediatrics, points out that the longer a child is breastfed, the higher their IQ will be. The correlation was made even after variables like mother’s intelligence, income, and education status were controlled.
A year of breastfeeding gives a child a 4 point IQ advantage by age 7
The results were clear, examining 1,300 mothers whose nursing time varied between six months up to a year.
- When they compared the breastfed children at age three, the researchers found out that for every month a child was breastfed, the child scored a fifth of an IQ point higher, verbally and non-verbally.
- When they compared the children at age seven, the researchers found out that verbal test scores went up a third of a point for each month the child was breastfed.
The results were so telling that MedLine Plus, the National Institutes of Health (NIH) and the National Library of Medicine, came up with a video that summarized the findings.
With no controls in place, breastfed children were found to have a 5.32 point advantage over formula fed children.
With the adjusted co-variates in place, such as parental socioeconomic status and maternal intelligence, there was still a 3.16 IQ advantage for breastfed children.
These IQ advantages were stable across childhood. The researchers also found out that low birth weight infants derived even greater benefit from long term breastfeeding than did normal birth weight infants.
Even after applying the critic’s variable adjustments, the IQ difference still leans heavily to the advantage of breastfed children.