Radeberger is not the best selling but probably the most popular beer in Germany. I found this survey which is almost 5 years old but things haven’t changed since then a lot I guess. Only mainstream beers were considered but Germany has so much beer and so many breweries. Look at this fantastic map which shows all German breweries (be patient it takes a while to load all pins).
Anyway, I like Radeberger and it is available almost everywhere in Germany.
Producer: Radeberger Exportbierbrauerei
Originating country: Germany
Brewing location: Germany
Bottle size: 0.5 l
Alcohol by volume: 4.8%
Ingredients: water, barley malt, hops
Test Kit: Imutest Gluten-in-Food Kit
Test result: The test result is negative. According to the instructions there should appear a clearly visible pink test spot on the left of the test area ( T ) to indicate the presence of gluten. The pink spot on the right test area ( C ) is a control spot and indicates that the extract/sample is suitable, the test has been performed correctly and all reagents are active. Even though the detection limit in this kit is very low (1-2 ppm) and the test is negative please note this is not a medical advice – please see also my facts page.