Does a lower carbohydrate protein substitute impact on blood phenylalanine control, growth and appetite in children with PKU?

Abstract:

BACKGROUND:In children with phenylketonuria (PKU), it is possible that high carbohydrate protein substitutes may adversely affect blood phenylalanine control. We evaluated if a low carbohydrate, 'ready-to-drink' protein substitute would impact on short term blood phenylalanine control, weight and appetite in children with PKU aged 3-10 years. METHODS:This was a 3-part, 5-week randomised, controlled, crossover study in which two different carbohydrate/protein-equivalent ratios in protein substitute [control protein substitute (CPS) median 1:1; trial protein substitute (TPS) 0.5:1] were compared. The effects on feeding behaviour, weight change and phenylalanine concentrations were studied. Fourteen children (12 boys; median age 6.3 y, range 3 to 9.7 y) with PKU on diet were recruited from 2 treatment centres. RESULTS:Phenylalanine control did not deteriorate with TPS and remained unchanged between pre-study and CPS (p = 0.783). No statistical differences were noted in energy intake between the two study parts. Any changes in weight were similar between the two groups and there was limited change in feeding behaviour. CONCLUSION:This study suggests that the carbohydrate/protein-equivalent ratio of protein substitutes can be reduced to 0.5:1 with no loss of blood phenylalanine control or adverse effect on weight gain in children with PKU.

journal_name

Mol Genet Metab

authors

Gokmen-Ozel H,Ferguson C,Evans S,Daly A,MacDonald A

doi

10.1016/j.ymgme.2011.09.014

subject

Has Abstract

pub_date

2011-01-01 00:00:00

pages

S64-7

eissn

1096-7192

issn

1096-7206

pii

S1096-7192(11)00325-8

journal_volume

104 Suppl

pub_type

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