Do a search on Anthony Calfo's forum. All your questions have been asked and answered. As to how much of a mushroom polyp one needs for survival, I have heard of one mushroom being chopped up into 10 pieces and good survival. Keep in mind, This is one of "god's creatures" and deserves some consideration, respect, and mercy. This means not throwing it in the blender as an experiment as one person here once bragged about. If in the future you see a need, use razer sharp instruments and near sterile conditions. Read up on it before you attempt it. There is no shortage of available info.