A researcher behind a study of wasabi's effect on cognition says he knew the fiery condiment had health benefits, but "the dramatic change" in memory was a surprise.
If you eat the leaves, could you tell me how good they are? I'm also considering it, but it seems that's a 2 year endeavor to finally get some rhizomes..
Wasabi roots are common in Japan and while there are pricing variations, it's not as expensive as its told here.
Plus you can grow them in the US as well (see below).
In the description says that "You won't be able to harvest the rhizomes of most wasabi plants until the second year", so that's a lot of waiting for it.