But even if it you didn't like the taste, it makes you feel good, and, at least for me, I run/hike faster after I eat it, not to mention other health benefits.
Natto is not pungent right after thawing, but if you let if further ferment, more ammonia components wind up in it, but the bacteria do make even more K2.
I’d say everyone should eat it immediately after thawing.