In a recent study published in the Pediatrics journal, researchers assigned 2-week-old bottle-fed babies to either take a formula based on cow's milk or a protein hydrolysate-based formula.
Both formulas had the same amount of calories.
Babies who drank the cow's milk formula gained weight faster.
But infants on the protein-based formula consumed less formula during a feed compared to the cow's milk formula.
Experts say they are now trying to determine why infants overfeed on the cow's milk formula.