Bell's Brewery

Most of Bell’s beers are made with four main ingredients: water, malted barley/wheat, hops and yeast. Any other special ingredients, such as the wheat in Oberon, Oarsman and Winter White Ale, the coffee we use in Java Stout, or the honey used in Hopslam for example, will be mentioned on their beers labels.

All of their beers are vegetarian and most are vegan except for the ones that use honey and lactose.
They also use some flavorings and juices. Some of their beers are flavored in different casks (wine, bourbon, whiskey, etc.), but those will be labeled on the bottle. They do not share their facility with any other brewery and their kitchen is completely separate from their brewing facility.

According to Star K's guidelines, their unflavored beer should be acceptable.