Metabolic effects of a human milk adapted formula on sulfur amino acid degradation in full-term infants.
The metabolic effects of formula feeding on sulfur amino acid degradation were studied in 6 full-term infants on the 6th day of life, and compared to corresponding data from breast-milk fed neonates. A normal excretion of total sulfur and inorganic sulfate was found, indicating an adequate intake of sulfur amino acids and a normal ability to oxidized these compounds to inorganic sulfate. A similar transaminative degradation of cysteine was observed in both groups. Formula-fed infants showed a normal output of methionine, whereas increased cystathionine and decreased taurine excretions were registered. The results were probably a combined effect of a limited intake of taurine, and a multiple immature enzymatic activity.
D000603:Amino Acids, Sulfur / Q000378:metabolism*; D001835:Body Weight; D003540:Cystathionine / Q000652:urine; D006801:Humans; D007225:Infant Food; D007231:Infant, Newborn; D008715:Methionine / Q000652:urine; D008895:Milk, Human; D013654:Taurine / Q000652:urine
D000603:Amino Acids, Sulfur; D013654:Taurine; D003540:Cystathionine; D008715:Methionine