A Brazilian study of 6,000 babies from all backgrounds since 1982 finds those who breastfed were more intelligent, spent longer in education and earned more.
Breastfed babies are more likely to turn into well-educated and higher-earning adults, according to a major long-term study.
Researchers in Brazil have followed nearly 6,000 babies from birth for the past three decades, enabling them for the first time to get an idea of the long-term effects of breastfeeding. Nearly 3,500 of them, now 30-year-old adults, accepted an invitation to be interviewed and sit IQ tests for the purpose of the study. Those who had been breastfed proved to be more intelligent, had spent longer at school and earned more than those who had not been. And the longer they were breastfed as a baby, the better they tended to be doing.
It is already known that breastfeeding can increase a child’s IQ by a small amount. The question that Dr Bernardo Lessa Horta from the Federal University of Pelotas in Brazil wanted to answer was whether this translated into greater intelligence and better prospects as an adult.
“Our study provides the first evidence that prolonged breastfeeding not only increases intelligence until at least the age of 30 years but also has an impact both at an individual and societal level by improving educational attainment and earning ability,” he said.