I've always tended to avoid Reformhäuser, as they are often more expensive that other health food…read moreor bio stores, but sometimes they are your only option.
We came to this location in search of Flohsamen (Psyllium), after striking out at our other regular haunts. They had a few different kinds, and though it wasn't cheap, it wasn't all that expensive either, considering how long it lasts (at least for my baking purposes).
We also checked out the rest of the store and I was surprised to see how extensive the vegan section is, with a lot of fake meat and tons of vegan cheeses--I would venture to say the "cheese" selection rivals that of the two vegan grocery stores in town. Naturally, it's also rather costly, but it's good to know that the options exist.
All in all, Vitalia is going to cost you a pretty penny if you do all your shopping there, but it's worth keeping in mind for some of the more obscure products you might be missing elsewhere.