i ended up zapping them to be safe. they're for omega-3s, mostly, although i may get a tad of b12 and maybe some fluoride from them, too. i used 3 fillets - about 10 g - to start. you can taste it immediately, and i don't think i'd want to use much more.
however, it was overpowered by the garlic, which was only one clove's worth. that seems like too much, so i'll try a half a clove, next time. and, then i'm wondering if there's a point.
i'll say it tastes more like a caesar, though - if a very garlicky one, for now.