Are Toxic Chemicals Lowering Our IQ?

Written by Dr. Steve Chaney on . Posted in Environment and Health, Issues

Is Chemical Brain Drain A Pandemic?

 Author: Dr. Stephen Chaney

In a past issue of “Health Tips From the Professor” I examined the evidence suggesting that toxic chemicals in the home could cause childhood asthma. That is alarming because asthma can predispose individuals to other diseases and affects quality of life.

Confused ChildBut, what if that were only the tip of the iceberg? For example, a recent headline stated: “More Toxic Chemicals [In Our Environment] Are Damaging Children’s Brains”. If that headline is true, it’s downright scary.

The authors of this study suggested that toxic chemicals which are abundant in our environment can cause decreases in IQ and aggressive or hyperactive behavior in children – and that those changes may be permanent.

The Study Behind The Headlines

The paper that generated the headlines (Grandjean & Landrigan, The Lancet Neurology, 13: 330-338, 2014) was a review of the literature, not an actual clinical study.

Based on published clinical studies, the authors identified 12 chemicals commonly found in the environment as developmental neurotoxins (toxins that interfere with normal brain development) based. [If you would like to find out what those “Dirty Dozen” chemicals are and where they are found, click here.]

This finding compares with 6 developmental neurotoxins that they were able to identify in a similar study in 2006.

The authors were not claiming that the number or amount of toxic chemicals changed between 2006 and 2014. They were saying that science has advanced to the point where we can classify six more chemicals that have been in our environment for years as developmental neurotoxins.

Even more worrisome, the authors postulate that many more environmental neurotoxins remain undiscovered.

Are Toxic Chemicals Lowering Our IQ?

To answer that question, you need to look at some of the studies they cited in their review. For example:

  • Elevated blood lead levels in children are associated with as much as a 7 point decrease in IQ (Lamphear et al, Environmental Health Perspectives, 113: 894-899, 2005).
  • Elevated fluoride levels in drinking water are also associated with as much as a 7 point decrease in IQ (Choi et al, Environmental Health Perspectives, 120: 1362-1368, 2012).

The effects of many of the toxic chemicals on IQ were difficult to quantify, but the authors estimated that exposure of US children to just 3 of the chemicals (lead, methymercury and organophosphate pesticides) was sufficient to lower their average IQ by 1.6 points.

What Are The Potential Consequences?

The authors spoke of the environmental neurotoxins they identified as representing a “silent pandemic of a chemical brain drain” that could cost the US economy billions of dollars.

One of the blog posts I read on this topic summarized the consequences in a very graphic manner. It said:

If one child’s IQ is reduced by 5 points, it doesn’t appear to make a big difference.  For example, that child might be:

  • A little slower to learn
  • A little shorter of attention
  • A little less successful at tests and at work

That might result in $90,000 in lost lifetime earnings

However, if the average IQ of every child in the US were decreased by 5 points, the effect becomes significant:

  • Only half as many members of the next generation would be “intellectually gifted”.
  • Twice as many of the next generation would be “intellectually impaired”
  • Lost productivity could be in the billions

Of course, statements like that are a bit over the top. Drs. Grandjean and Landrigan did not claim that the net effect of the chemicals they identified was a 5 point drop in IQ. Nor did they claim that all US children were affected equally.

Still, it’s enough to make you think.

Are Toxic Chemicals Causing Behavior Problems?

Angry boy portraitThe authors cited numerous studies linking the chemical neurotoxins they identified to aggression and hyperactivity. But perhaps the most compelling reason to suspect that environmental chemicals may be affecting brain development is the spiraling incidence of developmental disorders such as autism and ADHD. For example:

  • Autism has increased by 78% since 2007 and now affects 1 of 88 eight year old children.
  • ADHD has increased by 43% since 2003 and now affects 11% of children age 4-17.

Some of this increase could be due to better diagnosis of these conditions, but nobody believes that all of it is due to improved diagnosis. The authors claim that much of this increase is likely due to environmental exposure to the kinds of developmental neurotoxins they identified.

Is The Science Solid?

This is a difficult area of research. You can’t do the gold standard double-blind, placebo-controlled clinical trial. Nobody in their right mind would give one group of children toxic chemicals and the other group a placebo.

The studies cited in this paper were mostly population studies. Basically this means that they compared children with exposure to certain toxic chemicals to a control group that was as similar as possible to the first group except that their exposure to the toxic chemicals was less.

The limitation of this kind of study is obvious. We are usually comparing children from different locations or of different backgrounds. We almost never know if we have controlled for all possible variables so that the groups are truly identical.

As a consequence it becomes important to ask how many studies come to the same conclusion. For some of the toxic chemicals, such as lead, methymercury and organophosphate pesticides, the weight of evidence is very strong. For some of the newer additions to their list of developmental neurotoxins, it is pretty clear that the chemicals have neurotoxic properties, but the significance of those effects on the developing human brain are hard to quantify at this point.

The Bottom Line:

1)     A recent review claims that there is a good scientific basis for classifying at least 12 environmental chemicals as developmental neurotoxins that are likely to reduce IQ and contribute to behavioral problems in US children. [If you would like to find out what those “Dirty Dozen” chemicals are and where they are found, click here.]

2)     The science behind the claims in this review is solid, but not iron-clad.

3)     However, there are times when we need to simply ask ourselves: “What if it were true?” The consequences of lowered IQ and developmental behavioral problems are so significant that it may not make sense to wait until we have unassailable scientific evidence before we act.

4)     We all need to be guardians of our personal environment. But, it is not easy. The “Dirty Dozen” chemicals identified in this study come from many sources:

  • Some are industrial pollutants. For those, we need lobby for better environmental regulation.
  • Some are persistent groundwater contaminants. For those we need to drink purified water whenever possible.
  • Some are insecticides and herbicides used in agriculture. For those we need to buy organic, locally grown produce when feasible.
  • Some are found in common household products and furnishings. For those we need to become educated label readers and use non-toxic products in our home whenever possible.

These statements have not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure or prevent any disease.

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Latest Article

Eye Pain Relief

Posted August 20, 2019 by Dr. Steve Chaney

A Simple Treatment To Make Your Eye Pain Disappear

Author: Julie Donnelly, LMT –The Pain Relief Expert

Editor: Dr. Steve Chaney

 

good newsAs the song goes: ”…Summertime and the living is e-a-s-y….”  Here in Florida we know that the living is easy because it’s so hot who wants to be doing anything except either sitting in the shade, or inside in the air conditioning.  Personally, I don’t think this summer was so bad, especially the evenings, but then, I really hate the cold so maybe my opinion is biased.

To stay in alignment with “living is easy,” I’m taking the advice of a few experts who teach easy ways to stay calm, motivated, and happy.  I’m taking a 30-day break from the news.  It’s so much in my face lately that it’s really affecting me in a very negative way.  So far, I’m two days into my 30 days.

I’ve decided that I want to take away some of the stress that seems to be normal for everyone. To that end I was listening to a speaker who was talking about the dangers of stress and what it does to the body.  Really frightening! He was saying that negative news sells and, for example, in the 1990’s in one city of the USA, homicides had gone down 42%, but the local TV station increased its coverage of homicides by 700%.  It’s only gotten worse in 2019.  It’s making us think we live in a dangerous country, and it sure isn’t helping our blood pressure.

To solve that problem, this speaker recommended going on a “news fast” for 30 days. Absolutely no negative news of any kind for a full month.  I’m surrounded by news all day so it’s a challenge, but I’ve found a great substitute:  www.GoodNewsNetwork.org.  Their mission is to be an antidote to the barrage of negativity experienced in the mainstream media.

So, I want to share this with you, and if you have any other good news stations/websites you love, please feel free to share it with me.

I think I’m off to the beach with a big umbrella and a thermos of ice-cold tea!  Living the e-a-s-y life!

Have a relaxing month!

 

Eye Strain And Eye Pain

 

eye pain reliefThis week I had a client come to the office with a situation that is pretty rare.  He described his pain as on his eyeball, which then referred to the entire top half of his skull.  It was like drawing a line that went under his eyes, through his ears, and around his head.  It was definitely a headache but concentrated on his eyes.  He was in desperate need of eye pain relief.

This client works in an industry that has the computer screen changing frequently and he’s needing to locate information on the new screen quickly.  He has experienced eye strain before, but other times just having the weekend off has resolved the problem.  This time the pain didn’t go away.

We don’t ever think about the muscles that move our eyes, but they can get repetitively strained just like any other muscle in the body.  This especially happens if you are watching something that has your eye moving back and forth rapidly, like a game on your computer or phone.

The muscles that are most prone to a repetitive strain injury are the ones on the top of the eye and on the outside of the eye.  I’m not an eye doctor so I can’t explain why these two muscles cause more problems than the others, but my experience has shown this to be the truth.

 

Eye Pain Relief

 

eye pain relief massageThe treatment is simple, but you need to do it cautiously.  If you wear contacts, you’ll need to remove them. The pressure is VERY light.

Put your fingertip directly onto your eyeball and press down GENTLY.

Slide your finger from the top of your eyeball to the outside of your eyeball.

If you find a point where it is tender, that’s the spasm that is putting a strain on your eyeball.  Just leave your fingertip on that point for 30 seconds.

You may even get a light show while doing this, with different shapes and colors.

You’ll find that this simple treatment will soothe tired eyes at the end of the day.  But remember, the pressure needs to be light and gentle.

Why stay in pain when it’s so easy to find the muscular source of the problem and eliminate it?

 

 

Treat Yourself to Pain-Free Living (https://julstromethod.com/product/treat-yourself-to-pain-free-living-hardcopy/) is filled with over 100 pictures pain free living bookand descriptions proven to show you how to find and self-treat muscle spasms from head to foot!

Join the 1000’s of people worldwide who have discovered that tight muscles were the true source of pains they thought were from arthritis, fibromyalgia, and other serious conditions.  You have nothing to lose, and everything to gain by releasing tight muscles.

 

Treat Yourself to Pain-Free Living is your step-by-step guide to pain relief!

 

 

Wishing you well,

 

Julie Donnelly

 

These statements have not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure or prevent any disease.

 

About The Author

julie donnellyJulie Donnelly is a Deep Muscle Massage Therapist with 20 years of experience specializing in the treatment of chronic joint pain and sports injuries. She has worked extensively with elite athletes and patients who have been unsuccessful at finding relief through the more conventional therapies.

She has been widely published, both on – and off – line, in magazines, newsletters, and newspapers around the country. She is also often chosen to speak at national conventions, medical schools, and health facilities nationwide.

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