Microwave heating of infant formula is a common practice despite concerns of infant scalding. Beyond the issue of physical safety, little is known about the effects on nutrient content of microwave heating of infant formula. Casein-predominant infant formula in 120- and 240-mL glass and plastic nursing bottles of varying colors were heated for 40 seconds and 60 seconds, respectively. Temperature profiling was monitored during the heating cycle. Analysis of riboflavin and vitamin C was made prior to and after heating. Topmost portions reached a mean temperature of 44.7 ± 1.7°C and 43.0 ± 2.4°C for all types of 240-mL and 120-mL bottles, respectively. Topmost temperatures were significantly hotter than temperatures reached at other sites. Routine mixing resulted in formula temperatures which could safely be fed to infants (35.4 ± 0.3°C and 33.9 ± 0.2°C for 240-mL and 120-mL bottles, respectively). There was no significant loss of either riboflavin or vitamin C. Protocols for microwave heating are given.

This content is only available via PDF.
You do not currently have access to this content.