What should be done if beer shows signs of oxidation?

When beer shows signs of oxidation, the appropriate course of action is to discard the beer. Oxidation can lead to undesirable flavors and aromas, often described as cardboard-like or stale, which result from the interaction of beer with oxygen over time. Consuming beer that is oxidized might not only compromise the drinking experience but also may pose health risks if the beer has significantly deteriorated.

Recycling the bottle or refilling it with fresh beer would not solve the issue, as the oxidized beer itself remains unpalatable and could contaminate any fresh beer added. Drinking the beer without taking action would result in a substandard experience and is not advisable for consumers seeking quality. Therefore, the best practice when confronted with oxidized beer is to discard it appropriately.