How Kale is Poisoning us

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Kale is one of those vegetables that everyone thinks is so healthy. From kale chips to kale salad, kale has become an extremely trendy vegetables. But people have embraced kale without thinking enough about the chemicals it contains and its effects on the Earth. What you don't know could kale you.



Before scientists were blinded by kale’s health food halo, they studied its horrific effect on livestock. Farmers had been mystified by the births of lambs that already had goiter. Researchers experimented with kale on sheep and rabbits with grisly results. Turns out kale does contain a goitrogen, thiocyanate, which is chemically very similar to deadly cyanide. Some young lambs were stillborn, their brain development stunted by their goiters. The consumption of kale had blocked their thyroid’s ability to function properly even in the presence of proper iodine consumption. With many Americans consuming little iodine, especially those obsessed with health foods who eschew iodized salt, the effects could be devastating.

Even more alarming, later experiments showed that mixing the kale with corn and blood meal increased the effect, something you might want to think about next time you consider sauteed kale with cornmeal pancakes and blood sausage.

Scientists then never considered that humans would someday consider kale a “health food.” Back then it was only food for livestock and ignorant Scottish peasants. But even though people weren’t noshing on kale chips all day, kale managed to poison them. Cows grazing on kale transferred its poisons to their milk, affecting the thyroid development of children who drank it and causing an epidemic of goiter on Tasmania.

Kale is also rich in sulfur and compounds that convert to sulfur, which is the chemical that makes rotten eggs smell putrid. One metabolite of sulfur, S-methylcysteine sulphoxide, is known to cause “kale poisoning” – severe hemolytic anemia, a life-threatening breakdown of red blood cells, in livestock. Poor sulfur digestion is associated with many serious illinesses in humans, though whether it causes them or merely exacerbates them remains to be seen.

It makes sense that Kale would be dangerous given it evolved in an evolutionary war against those that dare to eat its leaves from aurochs to insects. One powerful weapon it possesses is lectins, which many of you recognize as a serious danger to human health, implicated in many autoimmune illnesses and other inflammatory disorders. The lectins in kale and other related species are very similar to the equally dangerous wheat germ agglutinin lectin.

Some people think that kale and other related vegetables prevent cancer, but large-scale epidemiological studies have shown no such effect and their phytochemicals may even cause cancer. For example, indole and its derivatives have been shown to promote many types of cancer, possibly by causing hormone imbalances or by stimulating the cyt-P450 pathway that produces genotoxic metabolites. If you already have cancer, it can promote further growth and the so-called “antioxidants” which people think are so healthy can prevent your body from fighting the cancer effectively.

Studies in pigs have shown that kale’s close cousin broccoli promotes severe DNA damage in the colon. Kale may also promote other types of digestive problems through difficult-to-digest carbohydrates known as fructans, part of a family experts are calling FODMAPs (Fermentable, Oligo-, Di-, Mono-saccharides And Polyols). Many people have found relief from IBS and other stomach problems by avoiding foods like kale on a low-FODMAPs diet. If you are constantly bloated and gassy it might be the pound of kale you are eating for breakfast every day.

You probably already worry a lot about antinutrients in grains, but kale contains many of the same antinutrients that rob your body of important vitamins and minerals and irritate the digestive tract including oxalate, phytic acid, and tannins.

The amounts of these chemicals in each variety of kale varies widely, so consuming kale is like eating an uncontrolled cocktail of immunogenic and bioactive health-harming chemicals and their even more chaotic breakdown products. Terrifyingly, these chemicals also vary with time of day and season, even when they are in your fridge!

Kale-ing the Environment

As kale becomes more and more popular, it raises the question: how will we feel the world’s almost 9 billion people on kale? The Food and Agricultural Organization at the UN doesn’t track kale production and consumption yet, but they will have to start. At current rates of growth, by 2350, almost all the world’s cropland will be devoted to kale. The consequences to the environment will be devastating.

Large-scale industrial commercial kale production requires clearing massive amounts of animal habitat and killing animals that invade the fields of kale. In the world of leafy greens production, any life that’s not a leaf is a potential liability. After the spinach-related e.coli outbreak, farmers can’t take the risk of co-existing with other plants and animals. Will the world look like the Salinas Valley looks like today? A sterile dry wasteland where any signs of life are promptly shot or poisoned?

Kale production not only destroys rivers and wetlands, it uses water that human beings need. It needs heavy irrigation during the hot months of the year. Furthermore, kale needs to be fertilized extensively, particularly given its soil-fertility reducing effects, and many farms use industrially-produced resource-intensive fertilizer or fertilizer made from the manure of factory-farmed animals. A full environmental impact analysis of kale production has yet to be done, a fact people ignore when they shovel kale chips blindly into their mouths.

The way kale is grown also increases its negative effects on your health. The EWG lists kale as one of its “dirty dozen” of vegetables most likely to be contaminated by pesticides. Pesticides used on kale include phthalates, dangerous chemicals that are known endocrine disruptors, wreaking havoc on the human hormonal systems. Many pesticides used to grow kale also are contaminated with immune-damaging dioxin and liver-destroying hexachlorobenzene.

Even organic kale might be rife with harm. Laverlam, a common organic pesticide, may trigger allergic reactions, which are on the rise in the United States today. As if kale didn’t destroy enough animal habitat, mineral oil used in organic production destroys the microhabitats founds in soil that are home to a great deal of biodiversity.

Thinking you can beat that by growing kale in your garden? Home-grown greens are known to be heavily contaminated by brain-damaging lead and cancer-causing arsenic.

In the end the best thing you can do for yourself, your family, and the world is to avoid kale and its cousins. This post contains over fifty peer-reviewed references to science, so think about that next time your so-called friend serves you a massaged kale salad with delicious flecks of parmesan reggiano. Remember there is no documented need for kale in your diet and you can get all the nutrients you need from delicious nutritious cow’s liver.