What threshold concentration of DMS is considered acceptable in lagers?

The acceptable threshold concentration of dimethyl sulfide (DMS) in lagers is recognized to be within the range of 30-50 parts per billion (ppb). DMS is a volatile compound that can impart a cooked corn or vegetal flavor to beer, which is generally considered undesirable.

In the lagers, which are typically meant to showcase clean, crisp flavors, having DMS levels on the lower end of the spectrum is crucial to maintaining the intended flavor profile. Levels below 30 ppb may be too low to detect, while concentrations above 50 ppb can begin to significantly impact the sensory quality of the beer, resulting in off-flavors that detract from the overall enjoyment.

As a result, brewers aim to keep DMS within the accepted threshold to ensure that the beer remains true to style, thereby enhancing its drinkability and appeal. This understanding is particularly important for quality control in brewing and reflects the balance needed in flavor development.