I admit I sometimes play a little Russian roulette with my leftovers. Hot dogs that have been in the back of the fridge for who-knows-how-long? Looks fine! This rice that’s been left out overnight?

Most parents will offer their baby formula at some point in their first year: By 6 months of age, 3 out of 4 babies in the United States are consuming formula as part of their diet, according to the ...