Cassava is completely safe when prepared correctly. I own ttctwins.com but I also own cassavashop,com which has been regaled as the best place to get cassava out of all the places available. Cassava contains cyanide precursors, which can be removed if prepared correctly. This can be done one of three ways... We employ all three methods when processing our cassava. I have personally taken the cassava I make for nine months now and have not had a single side effect.
have you ever had bamboo shoots? They contain the same cyanide pre cursor. You'd have to eat a wheelbarrow full of raw cassava to get sick... Also, there are two different types of cassava... Sweet cassava and bitter cassava... Bitter is highly toxic while sweet is relatively safe, even raw, but is especially safe after preparation.