As an expert sommelier and brewer, I can confidently say that open beer can indeed go bad if not refrigerated. While beer is generally known for its long shelf life, proper storage is essential to maintain its quality and taste over time.
When beer is exposed to oxygen, it can undergo a process called oxidation. This occurs when the oxygen reacts with the compounds in the beer, leading to off-flavors and a stale taste. This process is accelerated at higher temperatures, which is why storing beer at room temperature can significantly shorten its lifespan.
Refrigeration slows down the oxidation process and helps to preserve the freshness of the beer. The cool temperature helps to minimize the activity of the yeast and other microorganisms present, which can also contribute to the deterioration of the beer. By keeping the beer refrigerated, you can extend its shelf life and enjoy it at its best for a longer period.
Now, let's discuss the specific timeframes provided by Binwise. They claim that refrigerated beer can last two to three years past its expiration date, while room temperature storage only allows for a lifespan of four to six months. It's important to note that these timeframes are not set in stone and can vary depending on various factors such as the style of beer, packaging, and storage conditions.
Refrigeration certainly helps to slow down the aging process and maintain the beer's quality for a longer duration. However, even with refrigeration, the flavor and aroma of the beer may gradually diminish over time. This is especially true for beers with more delicate flavors, such as hop-forward IPAs or light lagers. While the beer may technically still be safe to consume after its expiration date, it may not offer the same enjoyable drinking experience as a fresh beer.
On the other hand, storing beer at room temperature can expedite the aging process due to increased oxidation and microbial activity. This can result in quicker flavor degradation and a shorter shelf life. It's important to note that room temperature can vary depending on the climate, but generally, it refers to temperatures between 65-75°F (18-24°C). If you live in a warmer climate, it's even more crucial to keep your beer refrigerated to prevent spoilage.
To summarize, refrigeration is key to maintaining the freshness and quality of beer, whether it's open or unopened. While refrigerated beer can last longer, it's always best to consume beer within its recommended expiration date for the best tasting experience. Storing beer properly and consuming it in a timely manner will ensure that you enjoy the flavors and aromas that the brewer intended.
In my personal experience, I have come across beers that have been stored at room temperature for an extended period. The difference in taste and aroma compared to fresh, properly refrigerated beer is quite noticeable. The flavors tend to be muted, and there is often a stale or oxidized character present. This is why I always recommend refrigerating beer to my clients and ensuring they consume it within a reasonable timeframe for the best possible experience.