- yet it has potential to produce gastric problems (so don’t eat too many green potatoes!) - world is full of poisonous mushrooms - Death Cap mushroom ; contains toxin amanitin
- it will kill humans but not rabbits (animals are not always perfect models to test toxicity) - Amanita Muscaria (red & white children’s storybook mushroom) à toxin muscarine - molds produce mycotoxins (not all dangerous, ex. penicillin) - grains (esp. cereals ) most susceptible to toxic molds (mycotoxins) à Alfatoxins - Aflatoxins ( ochratoxin A, patulin, fusarium ) à some of most carcinogenic substances - barley, corn, peanuts can be contaminated w mold - can have GMO corn with insecticide that will prevent insects from eating it - By inducing the corn to produce an insecticide, insects are discouraged from eating the corn. Mold grows where insects have bitten into the corn. - general rule à when in doubt, throw it out Video 3 - aged cheese & red wine have tyramine which can cause headaches - old stale fish produce histamine (breakdown product of proteins) - scombroid poisoning after eating fish w high levels histamine - mahi mahi (dolphin fish), albacore tuna, Bluefin & yellowfin tuna, mackerel, sardines à they all have high amounts of histamine - bc of inadequate refrigeration/preservation, bacteria convert histidine to histamine , leading to “scombroid poisoning” - symptoms: tingling, rash, headaches, hives/itching, nauseas, vomiting, diarrhea - treat with antihistamines like Benadryl - ciguatera poisoning assoc w barracuda fish - they eat toxic algae which concentrates in their bodies - symptoms: nausea, vomiting, watery diarrhea, numb/tingle in mouth & extremities - symptoms of temperature reversal à drink something hot & it tastes cold & reverse - not fatal - tetradotoxin in puffer fish/blowfish , served as “fugu” when properly prepared; trace amounts of toxin are always present - fatal if fish not properly prepared by eviscerating all organs that contain natural toxin - when eat fugu, you get tingling - if tingling stops below elbow, that’s okay; but if above, it’s likely fatal - puffer fish organs harbor tetradotoxin - Wade Davis, an ethnobotanist wrote The Serpent & the Rainbow - he learned Haitian witch doctors fed tetradotoxin putting ppl into state of stupor - relatives thought they were dead so they buried them, then they were unburied & taken as slaves - resuscitated them w “zombie cucumber” containing atropine & scopolamine which counteract tetradotoxin - domoic acid from algae ; when mussels suck it out from water, they become contaminated - 25 yrs ago 3 ppl died from eating PEI mussels in high-class restaurant - domoic acid causes short term memory loss & amnesia - now, monitoring of seafood is v strict - cassava can be contaminated w natural cyanide ; if not prepared well, can be lethal - has to be let to sit in sun before consumption - licorice root has glycyrrhizin which can lead to paralysis - can overdose on licorice - candy licorice is not made w real licorice (just sugar & anise) - comfrey sold in health food stores has pyrrolizidine alkaloids which are toxic to liver Video 4 Problems with body chemistry -
You've reached the end of your free preview.
Want to read all 22 pages?
- Spring '11
- pH, Pesticide, E number, Food additive