Natuurwinkel has a tricky location, if you don't know where to look for, but what the store has to offer is worth the search! The selection and variety in all products is incredible taken into account the relatively small size of the shop. You can find almost everything: food in cans or jars, fresh-produce, fresh vegetables and fruits, freshly baked bread, frozen goods, dry products e.g. flour, drinks, alcohol...
The only place in Maastricht where I have managed to find nooch and the best variety of plant-based milks.