I believe it's basically all fibre, so probably somewhat like konjac/shirataki. I'm not type 1, but for diet controlled low-carbing, Agar Agar should be ok, although I'd still side with Shirataki as it lends itself to more versatile savoury/ main meal options. I don't see why you couldn't use agar, but it is generally used in making candies as far as I know.