The objective of this randomized study was to determine if fiber-supplemented soy formula reduced regurgitation in young infants. We compared regurgitation in 179 infants randomly assigned cow’s milk-based (CM, 90) formula or soy formula with fiber (SF, 89). Initial daily incidence was similar (CM, 3.6; SF, 3.9 episodes), but significantly lower after 7 days on SF (CM, 3.4; SF, 2.3; p = 0.001). Less frequent regurgitation after 7 days on SF was sustained after 28 days (CM, 48%; SF, 31% of feedings; p = 0.001). Feeding SF effectively managed regurgitation while providing balanced nutrition without altering caloric distribution as occurs with adding rice cereal to formula.
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