Until she was 11 months old, Aleanie Remy-Marquez could have starred in an advertisement for breast milk. She took to nursing easily, was breast-fed exclusively for six or seven months, and ate little else even after that. She was alert and precocious and developed at astonishing speed, her mother said, sitting at four months and walking by eight months.But once Aleanie started putting weight on her feet, her mother noticed that her legs were curving in a bow shape below the knees.
Doctors diagnosed vitamin D-deficiency rickets, a softening of the bones that develops when children do not get enough vitamin D — a crucial ingredient for absorbing calcium and building bone, and the one critical hormone that breast milk often cannot provide enough of.
"We’re finding so many mothers are vitamin D deficient themselves that the milk is therefore deficient, so many babies can’t keep their levels up. They may start their lives vitamin D deficient, and then all they’re getting is vitamin D deficient breast milk," said Dr. Catherine M. Gordon, director of the bone health program at Children’s Hospital Boston and an author of several studies on vitamin D deficiency, including Aleanie’s case.
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