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Down to the Crunch: The Hidden Health Dangers of Nuts

By Diane Small

We all know that their thin skins make berries, peaches and apples amongst the most contaminated fruits when it comes to pesticides. So when I saw bags of organic nuts in the shops, I thought it was a bit of a joke: I mean, have you ever tried to crack a walnut or Brazil nut? It’s well nigh impossible without major tools. Their skins are so tough, they’re not even called skins – they’re shells! So it seems like it would be really, really difficult for pesticides to penetrate those, right?

Sort of.

Sure, nuts contain healthy, unsaturated fats which can help lower the risk of heart disease. All nuts are also a good source of vitamin E, an important antioxidant, and like all plant foods, they’re high in fibre and phyto-chemicals–both of which help protect against cancer and other serious diseases. Nuts are rich in magnesium, which helps maintain bone structure; and chromium, which helps to ensure proper insulin function. They’re also packed with zinc for cellular growth and wound healing, and manganese, which protects against free radicals. But there is a huge health difference between organic or non-organic nuts.

For example, we all know that roasting destroys nut nutrients, so we choose to eat them raw, right? But nuts are not actually raw unless you purchase them from the grower, as the USDA pasteurization laws require them to be pasteurized before they are sold in the supermarket.

While nuts may not be sprayed on the tree when they are growing, they are sprayed once picked and cracked. All nuts easily absorb pesticides because of their high oil content, so you really should buy organic, or shell the nuts yourself.

Health Dangers of Nuts

The Truth About Nuts

There are loads of pesticides and fungicides sprayed on nuts after they’re shelled.  Cashews are sprayed with endosulfan, a chemical which is very harmful to both humans and animals.   Pistachios may be treated with phosmat, which according to a study done by Cornell University, causes liver tumours and carcinomas and is extremely toxic to honey bees. Monsanto’s notorious pesticide glyphosate may also be sprayed on pistachios to help the shell open, and DDT was found in two samples of nut butter at the last national testing in 2000.

Walnuts normally have a lot of pest issues and so are super saturated with pesticides and more chemicals than any other nut, while Macadamia nuts are treated with atrazine which has been shown to harm aquatic organisms and there is some evidence that it has a negative impact on human reproduction.   Most nuts also contain traces of inorganic bromide, which is the result of the use of methyl bromide, which is applied to nuts to kill rats, mice and other pests while the nuts are being stored. Methyl bromide is an ozone-depleting chemical whose use has already been stopped in some countries, as it is considered to be a dangerous chemical to use.

800px-almond_nuts

Not Quite A Nut

Now let’s talk about peanuts. They’re actually a legume, not a nut, and grown in the ground where they have ample time to absorb loads of the pesticides they’re sprayed with.  Allergies to peanuts have inexplicably increased dramatically over the past few decades. Some claim that it may be because there are more of them in our diets, but that discounts the fact that in some cultures where peanut sauce is common (Indonesia, Thailand) nut allergies are far less. Others argue that peanut oil used in some vaccinations may be the culprit, or perhaps it’s that we’re not as exposed to healthy, natural bacteria in the soil as we used to be. In any case, nut allergies have only skyrocketed over the past 20 years or so.

Adding to the nut misery is the fact that peanuts – and all nuts, in fact – which are grown in humid areas can potentially grow a mould that produces aflatoxin, a potent human liver carcinogen.   Liver cancer rates are often higher in tropical countries that consume a lot of peanuts and peanut sauces, due to the lack of regulation to kill off the mould; but when the mould is killed off, it’s usually with pesticide, so how can we win?

800px-peanutbutter

Good News About Nuts

Basically, unless you are willing to crack and shell your own nuts,  organic nuts are the only way to go. In developed nations, alternative fumigation treatments such as double layered bags and vacuum packing are used, as are a maximum of six artificial anti-pest or fungus treatments. It may seem like a lot for organic products, but by contrast, the conventional nuts sampled by the PRC were tested for 51 chemicals, so organic nuts are still far healthier.

It’s true that organic nuts are expensive, though. An alternative is to buy Fair Trade nuts, as smaller-scale suppliers tend to use fewer chemical fertilisers because of the prohibitive cost, but fumigants may well be used when the nuts are in storage.

It’s a good thing to keep buying certain nuts, especially Brazils, if you want to keep the rain forest intact: Brazil nuts are collected from the last remaining tracts of the virgin Amazonian rainforest, which is rapidly shrinking. Brazil nuts can’t be grown on plantations as various wild elements are essential for their success, so wild is the only way – increased demand for Brazils means more protection for the forests!

So, in a nutshell? Nuts do provide a good source of vegan protein, fibre, Omega 6 and 3 fats, vitamin E and minerals. But to stay truly healthy, it is extremely important to always purchase organic nuts and seeds.

All images: Wikicommons

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2 Comments

  • Avatar
    Reply
    Sheldon
    Jan 9, 2018 at 9:50 pm

    What are the six artificial anti-pest or fungus treatments used with organic nuts?

  • Reply
    Food vs. Food: Are You a Health Nut? – IBX Insights
    Nov 14, 2018 at 4:02 pm

    […] did you know that nuts are also sprayed with pesticides and fungicides after they are shelled? Plus, you can’t wash them. So, while organic nuts are more expensive, […]

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