3D model of dichlorodiphenyltrichloroethane (DDT), an insecticide
I think everyone would agree that it would not be a good idea to put pesticides in a saltshaker and add them to our food at the table. But there is little agreement when it comes to their use in agriculture. How much gets into our food? What are the effects on our health? On the environment? Is there a safer alternative?
Where should we look to find science-based answers to those questions? One place we should not look is books written by biased non-scientists to advance their personal agendas. A friend recently sent me a prime example of such a book: Myths of Safe Pesticides, by André Leu, an organic farmer whose opinions preceded his research and whose bias is revealed in the very title. (more…)
[Ed. Note: I realize that I normally post on Monday, but thanks to an R21 grant deadline tomorrow, I will not be able to post new material today (although you might have noticed some "familiar" material posted yesterday.) Harriet has graciously agreed to cover for me today, and we have a special guest post for you tomorrow. Fear not. I'll soon be back. Trying to get the lab funded takes momentary precedence.]
In his new book The Myth of Mirror Neurons: The Real Neuroscience of Communication and Cognition , Gregory Hickok, a professor of cognitive science, challenges current conceptions about mirror neurons. He shows how a complex mythology arose and why it is unwarranted, how experimental results were misinterpreted and disconfirming evidence ignored, and how other interpretations might lead to better insights about how the brain works.
I couldn’t say it any better than Steven Pinker did on the jacket blurb:
Every now and again an idea from science escapes from the lab and takes on a life of its own as an explanation for all mysteries, a validation of our deepest yearnings, and irresistible bait for journalists and humanities scholars…Hickok puts an end to this monkey business by showing that mirror neurons do not, in fact, explain language, empathy, society, and world peace. But this is not a negative exposé—the reader of this book will learn a great deal of the contemporary sciences of language, mind, and brain, and will find that the reality is more exciting than the mythology. (more…)
Sandeep Jauhar wrote Doctored: The Disillusionment of an American Physician to express his frustration with the modern system of medical care in America. I found the book profoundly disturbing. If his experience is representative, I can understand why so many people have been criticizing doctors for only caring about money. His experience was so different from mine that I wondered if I had led a sheltered life as a military physician and was oblivious to what was going on in the civilian world. After further reflection, I think Jauhar is unduly pessimistic. Whatever the opposite of rose-colored glasses is, he’s wearing them.
His personal experience of medicine
Dr. Jauhar is a cardiologist who works in a large teaching hospital, where he had been hired to develop a program for patients with heart failure that would implement the most up-to-date medical knowledge and provide the best possible medical care. After long, grueling years of school, residency, and fellowship, he is elated to have finally finished his training and started a job where he can accomplish something good. But he soon sinks into despair. He is appalled by the realities of life as an attending physician, the many ways in which the “system” interferes with his efforts to provide the best care to patients, the unethical behavior of other doctors, and his inability to support his family.
The 2014 film Fed Up is an advocacy documentary. Its message:
- There is a worldwide epidemic of obesity.
- It is endangering our children.
- Increased sugar consumption is responsible.
- The food industry is responsible for our increased sugar consumption because it puts hidden sugar in processed foods, bombards us with advertising, favors profits over health, and lobbies against regulation.
- The government is responsible because it has failed to control the food industry.
The film has received mostly positive reviews and has been called the Inconvenient Truth of the health movement. It was written and directed by Stephanie Soechtig, whose earlier films attacked GMO foods and the bottled water industry, and narrated by Katie Couric, who “gave anti-vaccine ideas a shot” on her talk show in late 2013.
The film shows families struggling with childhood obesity and “experts” expressing their opinions. Their selection of “experts” is heavy on politicians and journalists and light on nutrition scientists.
Vaccination is arguably medicine’s greatest success. It has eradicated smallpox and has saved millions from death and suffering from a growing list of preventable diseases. It’s surprising that it has so many critics. Most of them are either not educated in medical science (like Jenny McCarthy) or are educated but prefer to reject science in favor of anecdotal experience (like Jay Gordon). Their arguments have been examined ad nauseum on this blog and elsewhere, and are easy to dismiss. But when I learned that an immunologist had written a book rejecting the whole idea of vaccination, I couldn’t dismiss it so easily. An expert in the field obviously knows more than I do about the relevant science; and if nothing else, she might have some valid criticisms of vaccines that I had overlooked. In 2012 Tetyana Obukhanych, PhD, published a short (53 page) book that is available in a Kindle edition: Vaccine Illusion: How Vaccination Compromises Our Natural Immunity and What We Can Do To Regain Our Health. I read the book hoping to learn something, and I did learn some things, but not anything that would make me question the current vaccine recommendations. I tried valiantly to understand her message; I think I succeeded. I’ll try to summarize what she is saying and explain why I think she got it wrong.
We would like to believe people are rational. We would like to believe that if they have formed a false belief based on inaccurate information and poor reasoning, they will change that belief when they are provided with accurate information and better reasoning. We are frequently disappointed.
An example of what should happen
I recently talked with a college professor who believed chiropractic treatment could lower blood pressure. His belief was based on a media report of a chiropractic study. He thought it was plausible that neck manipulation could somehow relieve obstructions to blood flow to the base of the brain, thereby somehow correcting the cause of high blood pressure. I told him that rationale was anatomically and physiologically implausible. I pointed out that the researchers used NUCCA, a form of manipulation that is rejected by most chiropractors. He did not know what NUCCA was. I provided him with information, including links to the study itself and to chiropractor Sam Homola’s excellent critique of the study. My friend changed his mind and thanked me for educating him.
An example of what all too often happens
I was invited to give the “con” side of a pro/con presentation on dowsing to a local discussion group. I lent my opponent my copy of Vogt and Hyman’s classic book Water Witching USA so he would know ahead of time what I was going to say. He read it. The book explains how the ideomotor effect creates the illusion that the dowsing rod moves of its own accord and explains that dowsers have never been able to pass controlled scientific tests. I said as much in my “con” presentation. His “pro” presentation consisted of two arguments: he had personally seen dowsing work, and lots of people believed in it. He didn’t even try to rebut my facts and arguments; he simply refused to engage with them in any way. It was as if he had not read the book and had not heard anything I said. Afterwards, one of the audience was heard to say she would have liked to hear more about how dowsing worked and less about how it didn’t work!
Will Storr investigates
Sadly, some people are unpersuadable. They might as well be saying “My mind’s made up; don’t confuse me with the facts.” We have seen plenty of glaring examples in the comments section of this blog. Will Storr wrote a book The Unpersuadables: Adventures with the Enemies of Science about his struggle to understand the phenomenon. He did a great job of investigative reporting, interviewing people with strange beliefs, spending time with them and also with their critics, and reading pertinent research. (more…)
This will be shorter than my usual book reviews and is something of an afterthought. I just finished writing a long article on “Food Myths” that Michael Shermer had asked me to write as a cover article for an upcoming issue of Skeptic magazine, and while researching the subject I read a book that someone had suggested to me (I’ve forgotten who you are, but thank you!). It occurred to me that since not everyone who reads SBM subscribes to Skeptic, it would be good to tell this audience about the book too.
(Note: if you subscribed, you could not only read my upcoming “Food Myths” article but also my regular SkepDoc column and my long article “On Miracles” in the next issue. And there’s lots of other great stuff in the magazine, including the Junior Skeptic section for your kids and grandkids. A digital subscription is available for only $14.99 and you can even get a trial issue for free, so you have no excuse not to check it out. End of commercial.)
The book is Diet Cults: The Surprising Fallacy at the Core of Nutrition Fads and a Guide to Healthy Eating for the Rest of Us, by Matt Fitzgerald, an endurance sport and nutrition writer. Not a doctor, but he understands science better than a lot of doctors who have written about diet and nutrition. His reasoning is persuasive and is supported by the scientific evidence. (more…)
In 1850, one in four American babies died before their first birthday, and people of all ages died of bacterial infections that could have been successfully treated today with antibiotics. Unfortunately, treatments that have effects usually have side effects, and we are seeing problems due to the overuse of antibiotics. They are given to people with viral infections for which they are useless and to food animals to improve their growth. As a result, antibiotic-resistant organisms are evolving and the development of new antibiotics is not keeping up with the threat. This is common knowledge, but we’re starting to realize that there may be other problems with antibiotics even when they are used correctly to save lives.
The rates of obesity, diabetes, asthma, food allergies, hay fever, eczema, inflammatory bowel disease, celiac disease, acid reflux disease, and esophageal cancer are all on the rise. Martin Blaser, MD, director of the Human Microbiome Program at NYU, thinks antibiotics may be to blame, either as a causal or a contributing factor. In his book Missing Microbes: How the Overuse of Antibiotics Is Fueling Our Modern Plagues, he describes some of the fascinating research he and others have been doing to elucidate the role of the more than 100 trillion microbes that live on and in each of us, and the possibility that antibiotics may have a causal role in several of the so-called diseases of civilization. (more…)
A new book by Thomas Schneider, MD, offers A Physician’s Apology. The subtitle asks, “Are WE making you sick?” I was eager to read it, because I could think of many things doctors might be apologizing for: overdiagnosis, overtreatment, ordering unnecessary tests, pathologizing the vicissitudes of everyday life, offering misleading low-fat diet advice, misrepresenting inadequately tested treatments, not putting enough emphasis on prevention, prescribing medication before giving lifestyle changes a chance, etc. I was disappointed: his basic apology was “Truth is extremely hard to find in medicine and science, and I’m sorry,” which is true but is hardly his fault. Then he promises to “tell you a number of medical and scientific facts that are different from what many have always been told.” He blames commercials, creative marketing, and clueless doctors. Then he offers his own “truths” and his personal recipe for wellness. Some of these “truths” are questionable, and some are frankly wrong.
Not long ago I wrote about the free online “Food for Thought” course. Joe Schwarcz (“Dr. Joe”) was one of the three professors teaching that course. He also has a radio show, a blog, a podcast, and he writes books. His newest book will be of particular interest to SBM readers: Is That a Fact? Frauds, Quacks, and the Real Science of Everyday Life.
I reviewed an earlier book of his, The Right Chemistry, for Skeptic magazine. You can read my review online here. I called him “The Carl Sagan of Chemistry” for his ability to popularize science and make it not only palatable but fascinating and entertaining. In the new book, Dr. Joe turns his attention to exactly the kind of subjects we cover on this blog. He is a chemist and most of us are physicians, but we reach the same conclusions because we look at the evidence from the same rigorous scientific viewpoint.
In The Right Chemistry, Dr. Joe explains that “chemical” does not mean “bad stuff” — chemicals make up the entire world, and we are made of chemicals that our own body manufactures. He shares his encyclopedic store of obscure and intriguing scientific facts. Have you ever heard of kangatarians? Did you know asparagus can grow up to 10 inches a day? Can you explain why crystals of Epsom salts crumble if you yell at them? Do you think explosives can’t be made on a plane with small amounts of liquids? (Dr. Joe thinks they can, but for obvious reasons he’s not divulging the recipe.) You probably didn’t know that in World War II the U.S. military developed a mixture called “Who Me?” that smelled like feces and was dispensed with an atomizer. French Resistance fighters were supposed to surreptitiously spray it on German officers to embarrass them, but it wasn’t a great success since the sprayer ended up as stinky as the sprayee.