Well-cooked the agaratine is largely destroyed, and they function more like an indigestible fibrous gut cleanser. Much like raw carrots.
Own experience seems to confirm that (so far).
But regardless of that, I like growing and eating them.
Ok you seem to know what you are talking about. But you can look up the clip if you are curious. Joe asks him about them he immediately refuses to say something about that because his life would be in danger.