As an expert sommelier and brewer, I can tell you that the presence of sodium in beer serves a specific purpose. Sodium, in the form of food grade sodium chloride (commonly known as table salt), is sometimes added to beer to enhance its flavor and balance its profile. This addition of sodium chloride is done in a controlled manner, as part of the overall water composition used in brewing.
One of the key reasons for adding sodium chloride to beer is to increase its sweetness. While beer is primarily known for its bitter taste due to the hops used during brewing, certain beer styles benefit from having a touch of sweetness. This sweetness can help to counterbalance the bitterness and create a more rounded flavor profile. By adding sodium chloride, which is a salt, the sweetness of the beer is synergistically enhanced.
However, it's important to note that the addition of sodium chloride is not necessary for all beer styles. Different beer styles have different flavor profiles and requirements, and not all of them will benefit from the increased sweetness that sodium chloride provides. Brewers carefully consider the desired flavor profile of the beer they are creating and make adjustments to the water composition accordingly.
When building a water profile for brewing, brewers take into account the levels of various ions, including sodium, calcium, magnesium, and others. Each ion contributes differently to the overall flavor and character of the beer. By understanding the levels of these ions, brewers can create a water profile that complements the desired style and enhances its unique characteristics.
In my personal experience as a brewer, I have found that the addition of sodium chloride can indeed have a positive impact on certain beer styles. For example, in brewing a malty and slightly sweet German-style Hefeweizen, I have added a small amount of sodium chloride to the brewing water. This helped to enhance the desired sweetness and balance the overall flavor profile of the beer, resulting in a more enjoyable drinking experience.
To summarize, sodium chloride is sometimes added to beer to increase its sweetness and balance its flavor profile. The levels of all ions, including sodium, are carefully considered when building a water profile for brewing. The addition of sodium chloride is not necessary for all beer styles, but when used judiciously, it can contribute to a more well-rounded and enjoyable beer.