Wurzelwerk is a really sweet little health food shop run by a friendly community which makes it really enjoyable to go shopping there. The product range is somewhat restricted but they have all the basics you need and will order anything additional if asked to. They have quite a lot fair trade products and get vegan nougat croissants on Mondays on request. And the fresh bread is amazing - it comes from a different bakery every day - try the Ciabatoni breads on Tuesday or Wednesday...!
I really like this place not just because I live around the corner but because you still feel like a human being and nut just like a customer. Noone rushes, you can take your time packing in your stuff and people are always up for a little chat.
SO much better than a big organic supermarket not far from here. Oh, and if you're a member, it's also much cheaper than in other shops too.
Cons: small product range