"Microbes in our intestines may play critical roles in how we absorb calories, and exposure to antibiotics, especially early in life, may kill off healthy bacteria that influence how we absorb nutrients into our bodies, and would otherwise keep us lean."
The list of issues with infants being given abx is extensive and I don't think even the medical community realizes the ripple effect. Yes--there are times when they might be necessary; but long ago--they were given (at any age) with a probiotic. We need to get back to that. Some of the better hospitals and NICUs start babies who had a course of abx on probiotics, too. It should be standard operating procedure.
Heather - Wife , Mommy & Health & Wellness Educator, Speaker & Consultant
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Here is the study (I haven't read it)
But here is another one that discusses gut microbials in infancy and obesity