Moms who eat junk-food set babies up for obesity
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Moms who eat junk food while pregnant or during breastfeeding are setting up their babies to be addicted to a high-fat, high-sugar diet, a new study has warned.
Researchers from the University of Adelaide suggest that such mothers while pregnant have already programmed their babies to be addicted to a high fat, high sugar diet by the time they are weaned.
In laboratory studies, the researchers found that a junk food diet during pregnancy and lactation desensitised the normal reward system fuelled by these highly palatable foods.
Led by Dr Bev Muhlhausler, Postdoctoral Fellow in the University's FOODplus Research Centre, this is the first study to show the effects of maternal junk food consumption at such an early stage in the offspring's life.
Opioids are produced by the body as a reward response, including in response to fat and sugar. These opioids stimulate the production of the "feel good" hormone dopamine, which produces a good feeling.
"We found that the opioid signalling pathway (the reward pathway) in these offspring was less sensitive than those whose mothers were eating a standard diet," Muhlhausler said.
This means that children being born to a mother who ate a diet dominated by junk food would need to eat more fat and sugar to get the same good feeling, increasing their preference for junk food. It would also encourage them to overeat.
"In the same way that someone addicted to opioid drugs has to consume more of the drug over time to achieve the same 'high', continually producing excess opioids by eating too much junk food results in the need to consume more foods full of fat and sugar to get the same pleasurable sensation," says Muhlhausler.
"Mothers eating a lot of junk food while pregnant are setting up their children to be addicted.
"Although our research shows that many of the long-term health problems associated with maternal junk food diets can be avoided if offspring carefully follow a healthy diet after weaning, they are always going to have a predisposition for over consumption of junk food and obesity. It's going to make it much more difficult for them to maintain a healthy body weight," Muhlhausler said in a statement.
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