Infants given antibiotics may face an increased risk for obesity later in childhood.
NYU researchers studied 11,000 young children. They looked at their weight and antibiotic use throughout childhood.
They found those given antibiotics between birth and five months were 20 percent more likely to be overweight by the time they turned three.
Experts say this doesn't prove antibiotics cause obesity, but it suggests the bacteria in our gut may be permanently changed if exposed to antibiotics early in life. The researchers are planning more studies.