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Published on: September 22, 2023
A different approach to breast-feeding of the infant with phenylketonuria
Margreet van Rijn1, Jolita Bekhof, Tietie Dijkstra
1Department of Dietetics, University Medical Centre Groningen, PO Box 30.001, 9700 RB, Groningen, The Netherlands. G.van.Rijn@fd.azg.nl
Insights
This study found a new breast-feeding protocol safe for infants with phenylketonuria (PKU). The approach, alternating breast and formula feeds, showed comparable metabolic control and growth to formula-only feeding.
Area of Science:
- Pediatrics
- Metabolic Disorders
- Nutrition
Background:
- Phenylketonuria (PKU) is a genetic disorder requiring strict dietary management.
- Traditional PKU management often relies solely on specialized formula.
- Breast-feeding offers numerous benefits but presents challenges in PKU management.
Purpose of the Study:
- To evaluate the safety and efficacy of a novel breast-feeding protocol for infants with phenylketonuria (PKU).
- To compare metabolic control and growth in PKU infants managed with the new protocol versus standard formula-only feeding.
Main Methods:
- A comparative study involving two groups of PKU infants.
- The intervention group (n=9) followed an alternating breast-feeding and phenylalanine-free formula protocol.
- The control group (n=9) received only phenylalanine-free formula.
- Metabolic control (plasma phenylalanine levels) and growth were monitored for the first 6 months.
Main Results:
- No statistically significant differences in metabolic control or growth were observed between the breast-fed and formula-fed groups.
- Mean plasma phenylalanine levels were 170 micro mol/l (breast-fed) and 181 micro mol/l (formula-fed).
- The new protocol was noted to be more convenient for parents.
Conclusions:
- The studied breast-feeding protocol is a safe and viable option for the strict management of otherwise healthy infants with phenylketonuria.
- This approach allows infants to consume both foremilk and hindmilk, potentially improving feeding dynamics.
Unlabelled:
We studied the possibility and safety of a new approach to breast-feeding infants with phenylketonuria (PKU). We compared a group of PKU infants being breast-fed according to our new protocol with a group of PKU infants receiving formula only. The breast-fed group consisted of nine infants born between 1994 and 1999 being breast-fed at the time of diagnosis. The formula-fed group consisted of nine PKU infants, born between 1988 and 1997. In the breast-fed group, feedings alternated between breast-feeding and phenylalanine (Phe)-free bottle-feeding. The numbers of breast-feedings were adapted to the plasma Phe concentrations. At each feeding, either bottle- or breast-feeding, the child was allowed to drink until satiety. Data on metabolic control and growth during the first 6 months showed no statistically different results. The mean Phe concentration in the breast- fed group was 170 micro mol/l (range 137-243 micro mol/l) and in the formula- fed group 181 micro mol/l (range 114-257 micro mol/l). Compared to a routine where both bottle and breast are offered at each feeding, this new approach is more convenient for the parents and the child will be able to empty the breast, therefore drinking not only foremilk but also hindmilk.
Conclusion:
the results suggest that this feeding protocol is safe in the strict treatment of otherwise healthy infants with phenylketonuria.
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