Therefore I have decided write about the brewing process and how it could potentially effect the Kosher Status of your favorite brew.
Beer is essentially brewed with four ingredients, which are Barley or Malt, Hops, Yeast, and Water.
However, brewers also use Wheat, Oats, Rye, and to a lesser extent rice and corn (famously used in light beers). The reason why the the grain is the most important part of the beer is because it provides fermentable sugars which allows the beer to turn into alcohol, later, when the yeast is added.
The barley is first malted which is a process that helps bring out the fermentable sugars. The grain is soaked in water which tricks the grain into thinking it was planted and begins to germinate. Then, before it can start sprouting, the water is drained and the barley gets cooked or kilned.