We already know that many people have very severe allergic reactions to peanuts, but did you know that peanuts may also carry toxins? The soft shell of the peanuts allows contaminants such as pesticides and naturally occurring fungi to get inside to the nut. The most concerning is a chemical that is produced by the fungus, Aspergillus flavis and is called, aflatoxin. Aflatoxin has been linked to liver cancer in developing countries; although no studies so far have concluded this in the U.S. In studies done on rats it has been shown to have a potent carcinogenic effect as well as having acute poisonous effects in humans.
"It has been established by previous studies that the occurrence of afatoxins is influenced by favorable conditions which include high moisture content and high temperature. Hence, the extent of contamination will vary with geographic location, agricultural and agronomic practice, and the susceptibility of the peanuts to fungus before they are harvested, and during storage, and the processing periods under favorable temperature and humidity conditions these fungi grow on stored peanuts. The toxins are particularly carcinogenic in humans and eating contaminated peanuts often results in liver cancer, amongst other diseases."
The government does do testing on raw peanuts and do not allow more then 20 parts per billion in the peanuts. Although, tested when raw, the processing procedure does not destroy the aflatoxin, which can continue to grow. Studies have not been done to see if there are long term effects of minute exposure to aflatoxin. One study showed that the most popular store brands of peanut butter, such as Jif, have the least amount of aflatoxins. While the health food brands where you grind them in the store, contain the most.
These toxins aren't only found in peanuts, corn is another popular carrier of this toxin. Other nuts, grains, and dairy may have traces of the toxin as well.
Peanuts are known to contain good healthy monounsaturated fat, but you can also get this fat in foods like avocados and olive oil. If you just can't get rid of your peanut butter and jelly sandwiches then I suggest switching to a nut that doesn't carry as much toxins. Almond and cashew butters for example are a healthy alternative.
If you still would like to stick to peanut butter, remember to choose organic peanut butters, to help avoid pesticides, since peanuts are one of the most highly pesticide contaminated crops. I also highly suggest eating ones where the only ingredient is peanuts; staying away from any that contain hydrogenated oils, sugar or additives.
Pura Vida!
Alica Ryan, NTP
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