cskinner79 posted the best answer
Traditional shirataki are not soy, they are konjac. I would imagine since they have almost zero calories that they would be good for slow carb... just make sure you read the label to determine if you're getting konjac-based shirataki or soy/tofu-based shirataki
http://en.wikipedia.org/wiki/Shirataki_noodles
And thanks for the reminder, I meant to give shirataki a try with the diet to see how it holds up.. a little bit of "spaghetti" and meat sauce with spinach and lentils in it would do me some serious good when the pasta cravings kick in.
My son is a pastatarian and the Miracle Noodles fulfill his need for noodling!
Tip: rinse for 2-3 minutes, drain, and heat in hot dry pan is the best way to get the "weird" off of Miracle Noodles.
I use them. They have a buttload of fiber so beware. If you cook them they really don't have a flavor but if you want that texture go for it. I put it in with teriyaki chicken (I make my own sauce without sugar or flour) and veggies stirfry. It makes me think I'm eating chinese food