In a separate study involving young children ages 2 months through 5 years, glycerol phenylbutyrate resulted in a more evenly distributed urinary output of PAGN over 24 hours and accounted for fewer symptoms from accumulation of phenylacetate.
This research focused on young children between the ages of 2 months and 5 years, where glycerol phenylbutyrate was found to distribute PAGN evenly over 24 hours and reduce symptoms caused by phenylacetate buildup.