Bamboo charcoal is made up of pieces of bamboo, which are taken from plants five years or older and burned inside an oven at temperatures over 1000°C.
Bamboo charcoal is well known about its high porosity, which makes bamboo charcoal has excellent absorption properties. So it often be used in water purifying and harmful gas absorption. Nevertheless, it also be used in food for years. This site illustrates a Japanese cookie coated by bamboo charcoal. It also said bamboo charcoal can absorb and neutralize many poisons and toxins when ingested. However, I'm worry about that some carcinogens would be ingested too, since some carcinogens may be produced during
the scorching process.
Thus my question is what is the Toxicological result of bamboo charcoal? Is it safe? Or probably carcinogenic?