At the recommend daily intake of about 1 to 2 tablespoons, approximately 5 — 10 mg of
hydrogen cyanide is released from flaxseed, which is well below the estimated acute
toxic dose for an adult of 50 to 60 mg inorganic
cyanide and below the 30 to 100 mg / d humans can routinely detoxify (Roseling 1994) Eating excessive amounts of flax seeds too quickly can cause mild digestive problems in some people.
Then they pick an insulation that is made from hydrocarbons, it uses hydrochlorofluorocarbon (HCFC) as a blowing agent, has trischloropropylphosphate (TCPP), a possible bioaccumulative toxin, as a flame retardant, and if it does catch on fire, «will produce dense, black,
toxic smoke releasing carbon dioxide, carbon monoxide and possible traces of
hydrogen cyanide, halogen acids and nitrogen.»