As a longtime vegan, I'm used to looking up Barnivore.  (Yay Barnivore! \o/)

However, a (non-vegan) German friend of mine recently told me that **all** beers in Germany are vegan.  When I pushed her on it, she gave me a link to [this Wikipedia article](https://de.wikipedia.org/wiki/Reinheitsgebot)

It talks about German "Purity Law", stating only a very limited set of ingredients are allowed, and that there are bodies that supervise this to ensure that standards are met.

I know that clarifiers are a concern here.  

Does this Purity Law extend to process thereby making every German Beer vegan?  

What exceptions should I look out for when drinking beer in Germany?

Do the same laws apply to German beers produced for export?