Cancer is caused by taking in of heavy metals like lead,cadmium,mercury,etc. This metals mostly found itself in our body inform of cosmetics like bleaching cream & soap (contain mercury), most black lipsticks ( have lead). Also exposure to high radiation as found in X ray , mammogram (equipment used to test if a woman has breast cancer use radiaton 1000 times that of X-ray).etc. Eating of contaminated & or expired canned foods like tomatoes, eating of highly processed foods etc. Drinking of satchet or bottled water was exposed to heat etc. Free radicals make us to get cancer. U get cancer when u lack or have very low vitamin B17 The good news is that a lot of our natural foods are capable of fighting cancers & removing those metals & chemicals that causes cancers. Eg Mango fruit removes heavy metals from our body thereby preventing us from getting cancer chelation ( adsorption ie a sort of magneting). Also Apple fruit. Apple seed contains mild cyanide. This cyanide fights & prevent us from getting cancer. Next time u eat apple don't throw away the seed. Green vegetable leaves contain anthioxidant. This as well fights against free radicals. Thus prevent us from having cancer.etc etc Change of eating life style can as well prevent, reverse n cure cancers