y seeds (think poppy seeds) will ""swell"" and turn a bit gummy. This isn't a big deal, but it changed the taste of my absolute favorite soup... so I don't think I'll try it in that one again (lentil). I drink my smoothies quick, so I add these as the last step, and I don't think they have much time to swell. The seeds themselves are pretty tasteless to me, just little black dots. WARNING: THEY WILL STICK IN YOUR TEETH! Seriously. These are an ""at home"" item only - when I can brush my teeth or