Babies' immune systems are not as robust as adults', so they are more susceptible to food-borne illnesses that may be present in expired formula. [substeps] If you have an unopened, expired can of baby formula at home, many stores will allow you to return it for a free replacement.
[header] How to prepare milk for baby [title] Check the expiration date. [step] If you're using any kind of packaged formula, check the package for the expiration date or use by date. If the date has passed, discard the formula.