As an expert sommelier and brewer, I can confidently say that beer can indeed go bad if left in the heat. While beer is generally a resilient beverage, exposure to high temperatures can have a detrimental effect on its flavor and overall quality.
When beer is stored at room temperature, its shelf life can be significantly reduced. Normally, beer can last up to nearly six months when stored properly in a cool environment. However, keeping it at room temperature can shorten its lifespan to just a few weeks. This is because higher temperatures accelerate the oxidation process, leading to the breakdown of compounds in the beer and ultimately affecting its taste.
Additionally, exposing beer to very warm temperatures can have a more immediate impact on its flavor. If a beer is subjected to hot temperatures for even just a couple of days, it can result in a noticeable deterioration of taste. The heat can cause the flavors to become muted or even entirely altered, rendering the beer less enjoyable to drink.
It's important to note that while heat can negatively affect the quality of beer, it cannot make you sick. Unlike some other perishable food and beverages, beer does not harbor harmful bacteria or pathogens that can cause illness. So, while the taste may suffer, there is no need to worry about the safety of consuming beer that has been exposed to heat.
To illustrate the impact of heat on beer, let me share a personal experience. I once left a six-pack of craft beer in the trunk of my car during a scorching summer day. When I finally got around to drinking one of the bottles, I was disappointed to find that the flavors had become dull and muted. The hop aroma, which is a hallmark of many craft beers, was barely noticeable. It was a stark reminder of how heat can quickly diminish the quality of beer.
To summarize, beer can go bad if left in the heat. While it won't make you sick, exposing beer to room temperature or higher temperatures can lead to a decline in flavor and overall quality. To ensure the best taste and longevity of your beer, it's always recommended to store it in a cool environment, such as a refrigerator or cellar.