PROTEIN CONTENTS OF MILK SURROGATES AND T HEIR SANITARY REGULATION

Objective. To determine the frequency of utilization of milk surrogate s as well as their protein contents and composition. Material and meth ods. Interview data on lactation patterns previously recorded (1986-19 94) in Hermosillo, Mexico, were reviewed. Both human and surrogate mil k fluids were tested; total protein contents were quantified by microK jeldhal and protein composition was determined by electrophoresis comp uter densitometry. Results. Eleven milk formulas and three whole cow m ilks were used more frequently for infants aged 0-6 months. Total prot ein contents of modified and follow-lip formulas were the same as repo rted on the label, in compliance with sanitary regulation. Casein cont ent of human milk was 40%, and modified formulas contained 44%; follow -up formulas and whole milks were 60% and special formulas contained m ore than 70%. Conclusions. Products used for lactation seem to be inad equate for infant nutrition. In addition, the protein composition of s ome products was quite different that of human milk, and they are not proscribed from official regulation.