PICA IN PREGNANT TEENS LINKED TO LOW IRON
In a study of 158 pregnant teenagers in Rochester, NY, nearly half engaged
in pica – the craving and intentional consumption of ice, cornstarch, vacuum
dust, baby powder and soap, and other nonfood items, reports a new Cornell
study.
Moreover, such teens
had significantly lower iron levels as compared with teens who did not eat
nonfood substances.
Pregnant teens,
regardless of pica, are at higher risk for low hemoglobin, which can lead to
iron deficiency and anemia. Low iron in pregnant teens raises the risk of
premature births and babies with low birth weights, which in turn increases infant
mortality rates.
“In this study, the
strength of the association between pica and anemia is as big as any known
causal factor of anemia in pregnant teens; this is a very strong association,”
said Sera Young, a research scientist in nutritional sciences in Cornell’s
College of Human Ecology and a co-author of the study published online in the Journal
of Nutrition.
In the study, pica
behaviors and iron deficiency increased over the course of the pregnancies.
“As anemia increased,
so did these behaviors, but we don’t know what happens first,” said Kimberly
O’Brien, professor of nutritional sciences and the study’s senior author.
The study included African-American, white and Latina pregnant teens. Of the
nearly 47 percent of adolescents who reported pica behaviors, most – 82 percent
– craved ice, followed by starches, powders, soap, paper, plastic foam such as
pillow stuffing or sponges, baking soda, and a few other items.
Texture appears to be
very important to those engaged in pica and is one commonality among the types
of substances consumed.
When people crave ice,
they consume “cups and cups and cups of it,” said Young. At the same time, “ice
is not going to change someone’s iron status,” said O’Brien, leading to her
hypothesis that iron deficiency may have an effect on brain chemistry that
leads to these cravings.
“The public health
importance of pica really needs to be acknowledged,” said Young. “My hope is
that these studies put pica on the radar as a legitimate public health issue.”
The study was funded by the U.S. Department of Agriculture and the National
Institutes of Health.
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