Dom VastaThe body can quite easily handle small amounts of cyanide with no short or long term ill effects, it's only when you get close to the lethal dose that it becomes bad, but there is no evidence this chemical has any effect on cancer, aside from killing it by killing its host. The compound is hydrolozed into Cyanide and other byproducts in the duodenum, not the cancer cells, if you injected laetrile, it might have some effect, as it would actually be metabolised by the cells, but the concentration of glucorinidases in cancer cells are no different to normal cells, it might be a tiny bit useful for liver cancer in conjunction with other forms of chemotherapy, or as an adjuct to oncolytic virus therapy, but even then, only intravenously injected.
no hassleYes, but if you combine the seeds with a fibrin stripping enzyme like Bromelain (pineapple enzymes) the red blood cells and the seeds can go in for the kill. Look up enzymes for cancer. Even some Cancer research organizations (and they are heavily biased) see the potential in enzyme therapy.