Can You Drink a Day Old Coffee?

We don't recommend drinking day-old coffee, especially if it has gone rancid and has accumulated an unpleasant smell and/or taste. Brewed coffee also has a tendency to accumulate molds especially when kept outside the fridge. Do not drink day-old coffee if it has milk mixed in it, unless you kept it in the fridge.

Can drinking day old coffee make you sick?

ANSWER: For the most part, old coffee beans, or even old ground coffee will not make you sick. The brew that old coffee produces, however, will not taste as good as fresh coffee will, and might even taste stale, or unappealing.

Does coffee go bad overnight?

Coffee goes stale because of a chemical reaction called oxidation. ... Furthermore, if you let your coffee sit out overnight, its volatile flavor substances would evaporate within the air until they're completely gone. Reheating your morning coffee in the afternoon would make it lose even more of its aroma.