Abstract
We found no significant differences in mean total and free tryptophan concentrations in sera of healthy, full-term infants fed cow's milk formula and healthy, full-term infants who were breast-fed. Serum tryptophan concentrations were measured 1 h after feeding when the infants were 2 and 6 days of age. In this study cow's milk formula compared favourably with human milk as primary nutrition for full-term infants, despite a two-to-three fold higher level of free tryptophan in human colostrum.
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Zanardo, V., D'Aquino, M., Stocchero, L. et al. Serum total and free tryptophan levels in term infants fed cow's milk formula or human milk. Eur J Pediatr 148, 781–783 (1989). https://doi.org/10.1007/BF00443111
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DOI: https://doi.org/10.1007/BF00443111