ISSN:
1432-1076
Keywords:
Key words Protein quality
;
Dietetic treatment
;
Phenylketonuria
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract The protein quality of the diets of phenylketonuria (PKU) children of different ages (3 months, 10 months, 3 years, 8 years, 12 years, 16 years) with low or high phenylalanine (Phe) tolerance was assessed according to the recommendations of the FAO/WHO consultation group [13]. The amount of each essential amino acid (AA) per gram dietary protein was calculated and compared to the reference. The resultant amino acid score (AAS) indicated a limited to inadequate biological protein quality of the diets in 3-month-old infants (2.2 g protein/kg body weight/day) and 10-month-old infants (2.0 g protein/kg body weight/day) with a “high” Phe tolerance. In all other age groups the AAS was 〉 100%. However remarkable imbalances in the AA pattern were apparent. Beginning with the age of 3 years (1.7 g protein/kg body weight/day) the intake of the AA lysine and isoleucine was three or two times higher than recommended. At the age of 8 years (1.4 g protein/kg body weight/day) the intake of three AA (valine, isoleucine, lysine) was – related to the WHO recommendations – 217%, 229% and 291%. Similar results could be found in the age groups of 12 years (1.1 g protein/kg body weight/day) and 16 years (0.9 g protein/kg body weight/day), respectively. These calculations might help to reconsider the composition of the AA mixtures used in the dietetic treatment of PKU patients.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/PL00014235
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