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Study: Well-Water Can Raise Arsenic Levels In Formula-Fed Babies

Parents already concerned by recent revelations about arsenic in rice, grains and juices, brace yourselves: A new study found higher levels of arsenic excreted by infants exclusively fed formula, compared to breast-fed babies. A likely culprit: well-water.

In the small study of private well-water users in New Hampshire, overall arsenic exposure was relatively low for most 6-week-old infants regardless of how they were fed. “So that’s good news,” says Kathryn Cottingham, a professor of biological sciences at Dartmouth and the study’s co-lead author. “That said, infants fed exclusively with breast milk were less exposed to arsenic than infants fed with formula, and some infants fed with formula may have been exposed to very high levels of arsenic due to high concentrations in their home tap water.”

In the study, published in the journal Environmental Health Perspectives, researchers measured arsenic in the home tap water of 874 families, urine from 72 infants and breast milk from nine mothers.

(Donald Clark/Flickr)

(Donald Clark/Flickr)

Arsenic levels in the tap water tended to be well below the EPA’s recommended upper limit, researchers report. Still, they found that: “measured urinary arsenic concentrations were 7.5 times higher in exclusively formula-fed infants compared to breast-fed infants,” says Cottingham.

The bottom line, she says, is get your well-water tested.

“In terms of fear mongering, that’s the fear I’d like to instill: if you have well-water, get your water tested,” she says.”I don’t want to freak people out about feeding their babies formula.”

Arsenic is a naturally occurring element found in groundwater around the world — and in some places, in very high concentrations.

Exposure to high levels of arsenic, a human carcinogen, has a number of potential health consequences, the study authors note, including cancer, cardiovascular disease, diabetes, obesity, adverse birth outcomes and altered immune systems. Continue reading