Dispelling nutrition myths, ranting, and occasionally, raving


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The dark green leafy truth about your kale smoothie

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I’ve been slacking again, sorry! No post on Monday and I had plans to write a post debunking this article¬†about how kale is killing us all that a friend sent me over the weekend. My immediate reaction was that if kale is accumulating these toxins then it stands to reason that many other vegetables are, as if people need any discouragement from eating their veggies. My friend responded that it would be best if everyone stuck to corn dogs. Of course, that’s no solution as corn dogs are full of GMOs and carbs which we all know cause “grain brain”. Anyway… I was going to dig a little deeper but before I did, I saw this article by Julia Belluz that did that for me so, please, go read her article about how faulty the “science” is behind the headlines that kale is a killer. Sure, alliteration is a great literary device (possibly my favourite), it makes for great headlines, but it doesn’t make bad science good.

There are just a couple of things I really want to emphasis that Julia just touched on. First, despite what the articles indicate, this was not a strong scientific study. There was no true control group. There was no randomization of participants. This was a very small “sample” of 20 self-selected individuals who went to Ernie Hubbard for “detoxes” for myriad inexplicable medical complaints. Ernie started with the assumption that kale was causing their problems, he didn’t seek out other causes. His finding that they were all kale consumers was a self-fulfilling prophecy. Second, Please, please, please don’t stop eating vegetables because of these sensational headlines. The benefits from eating vegetables far outweigh any real risks. Variety is an essential part of any healthy diet so be sure to consume a wide variety of vegetables, including leafy greens and members of the Brassica family, such as kale.


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Cilantro cleanse

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Oh facebook and your unending perpetuation of useless “cleanses” and weight loss scams. I saw this one¬†about cleaning your kidneys by drinking cilantro or parsley water.

The thing is, toxins don’t accumulate in your kidneys. The kidneys act as filters, removing waste products from your blood, and excreting them in your urine. They don’t hang onto these waste products (1).

Okay, so cilantro and parsley won’t rid your kidneys of toxins, but is there any truth to their use as “detoxifiers”? Well, parsley acts as a diuretic (i.e. it makes you pee more) so, in the sense that it will speed the removal of waste products from your body via urine it’s kind of true. However, it won’t remove any more waste than would be eventually removed if you just waited a little longer to pee.

Years ago, it was reported that a cilantro soup increased excretion of mercury following removal of mercury fillings (2). Since then, cilantro has been popularly touted as a detoxifier via chelation of heavy metals. Unfortunately, since that initial study, there has been little research to support the ability of cilantro to remove heavy metals from the body.

If you like cilantro and parsley water and tea, go ahead, there’s no evidence that consuming it will harm you. However, it’s not going to remove toxins from your kidneys, and it’s unlikely that it will remove toxins from elsewhere in your body.