Can you drink beer that has been stored in the refrigerator overnight?

Generally, whether beer stored in the refrigerator overnight is safe to drink mainly depends on how it was stored. If it has been properly sealed, it can still be consumed. However, if it was left unsealed, bacteria may easily grow, making it unsafe to drink.

After opening, if beer is not sealed, the carbon dioxide will gradually evaporate, resulting in a deteriorated taste. Moreover, the malt and hops in beer may breed various bacteria when exposed to air for an extended period. Drinking such beer could allow bacteria to enter the intestines, infecting and irritating the gastrointestinal mucosa, potentially causing discomforts such as diarrhea, abdominal pain, or constipation, thus affecting health. Therefore, it is generally not recommended. However, if the bottle or can is tightly covered with plastic wrap and refrigerated overnight, the flavor should remain unchanged and spoilage is unlikely, making it generally safe to consume.

It is advisable to finish beer in one sitting whenever possible. Additionally, avoid excessive alcohol consumption, as alcohol itself is an irritant; drinking too much may irritate the gastrointestinal mucosa, leading to digestive disorders and negatively impacting health. Also, avoid drinking ice water while consuming alcohol, as this may further increase irritation to the gastrointestinal tract.