No Comments »
I am hesitant to review diet books because they are so often a tangled mess of fact and fiction. Teasing out their truth from falsehood is about as exhausting as delousing a long-haired elementary school student. However, after being approached by the authors’ PR agency with the promise of a book that contains science-based nutrition information I decided to agree to the review. This is how the book was described to me in an email:
In their provocative new book, Eat to Save Your Life, best-selling authors Dr. Jerre Paquette and Gloria Askew, RRN, sort through the piles of information and misinformation about nutrition to reveal the true connection between food and health. Fed up with the advertising hype and conflicting nutritional advice, the duo provides common sense explanations for consumers everywhere who are looking to make smart nutritional choices.
Unfortunately, I was sold (quite predictably) a bill of goods. And rather than ignore the book and simply not do a review, I figured that maybe a negative review would reduce the number of incoming PR requests for future tomes of pseudoscience. In the end, I’ll probably just become the focus of personal attacks by dedicated proponents of various snake oils.
That being said, I thought it might be somewhat instructive to remind Better Health readers of certain basic “warning signs of pseudoscience” that I accidentally overlooked in agreeing to review the book. For a more complete review of similar “signs” I highly recommend Dr. David Gorski’s 2007 classic, humorous take on predictable arguments and behaviors of alternative medicine proponents (written in the style of comedian Jeff Foxworthy). As for me, I tend to think of much of the world of integrative medicine as a militant group of bakers eager to add odd, inert and occasionally toxic substances to cake recipes.
And so, without further ado, here is a small sample of what authors Askew and Paquette have added to their half-true diet book recipe:
- The “one true cause” fallacy: The book opens with an interesting review of vitamin C deficiency, noting that it (apparently) took the British Royal Navy 40 years before they accepted that the treatment for scurvy was citrus extract (rather than flogging). Citing this incident as an example of nutritional deficiency leading to life-threatening illness, it’s a short ride to the “one true cause” fallacy whereby the authors postulate that there are untold numbers of modern diseases caused by unrecognized nutritional deficiency syndromes. Nutritional deficiency may be the one true cause of most diseases, you see.
- The appeal to research without references. Countless appeals are made to “mounting evidence” of this and that (arthritis being caused primarily by food-related inflammation for example), either without reference footnotes, or with mentions of sources of dubious credibility (such as the Canadian Association of Naturopathic Doctors).
- The appeal to supplements in lieu of vaccines. No diet advice would be complete without a gratuitous attack on vaccines, right? The authors suggest that flu vaccines (for example) only provide immunity for 2 months “and only for certain individuals.” Meanwhile, they assert that a combination of Echinacea, garlic, and vitamin C support the immune system to successfully fight of viruses. These claims are simply unproven and multiple studies have already found no benefit (over placebo) of these supplements at preventing and treating the common cold.
- Over-diagnosis. If you think that the world of medicine is predisposed to seeing disease where there is none, try the alternative medicine world. The authors assert that everything from zits, to rashes, to “brain fog” are potential signs of grave underlying immune compromise – caused by, you guessed it, dietary deficiencies.
- Over-supplementation. The authors argue that “supplementation is a necessity in our nutrient-robbed world.” However, new evidence doesn’t support supplementation for the general population, though it had beentraditionally felt that multi-vitamins might be valuable. In addition, new studies are finding that food sources are preferable to supplements for daily nutritional requirements (such as calcium) and that anti-oxidants such as vitamin E may do more harm than good.
- The “organic is more nutritious” argument. Although a recent systematic review of the scientific literature found no support for the notion that organic foods contain more nutrients than those grown with traditional methods, the authors attribute Americans’ supposed vitamin deficiencies to poor soil quality caused by non-organic farming methods.
- Nutrigenomics and DNA hype. The authors do not take a sufficiently skeptical view of the emerging field of nutrigenomics (whereby certain foods and supplements are recommended to individuals based on their genetic profiles). They even suggest that nutrigenomic testing is so much fun, it’s “almost like being part of a CSI television show.” Who cares if it’s no more accurate than fortune telling?
So what’s the half true part? Well, obesity is certainly a driver of many modern illnesses, and obesity is caused by (in no small part) nutritional choices. The authors cite statistics on the ravages of heart disease, high blood pressure, and diabetes on the U.S. population which are all quite true. (How this supports the “deficiency” argument is somewhat lost on me – because it would seem more logical that a possible excess of nutrients could be the “one true cause” of a lot of these diseases, but I digress).
There are real nutritional deficiencies that cause medical problems, such as iron-deficiency anemia, neural tube defects related to folic acid deficiency, vitamin D deficiency and rickets, and osteoporosis contributed to by low calcium levels. These conditions underscore the importance of healthy eating habits, but do not support the idea that the entire population is deficient in these nutrients. In fact, a large population study analyzed by the CDC, suggests that most Americans are not deficient in any major nutrient even with their current sub-optimal and obesogenic eating habits.
In general, fair-minded individuals will find Eat To Save Your Life to be yet another example of a half-true, hysteria-peddling, micro-nutrient-obsessed diet advice book. Ironically, the book’s title itself states the opposite of what we really need to be doing to reduce obesity-related diseases: stop eating (so much) to save our lives.
This book may be purchased (against my medical advice) at Amazon.com.
This post originally appeared at the Science Based Medicine blog.
No Comments »
I met Dr. Marty Makary over lunch at Founding Farmers restaurant in DC about three years ago. We had an animated conversation about hospital safety, the potential contribution of checklists to reducing medical errors, and his upcoming book about the need for more transparency in the healthcare system. Marty was well dressed and soft spoken – sincere, and human. We exchanged business cards and wished each other luck in changing the healthcare system for the better. We were two doctors tilting at windmills.
Just two months ago my fiancé sent me a “must read” article from the Wall Street Journal. It was Marty’s provocative piece, “How To Stop Hospitals From Killing Us.” The article was an excellent primer for his book, “Unaccountable: What Hospitals Won’t Tell You And How Transparency Can Revolutionize Health Care” which I highly recommend (holiday gifts, anyone?)
Unaccountable is both horrifying and oddly optimistic. Marty describes case after case of medical errors, lapses in judgment, and near misses in the surgical suite. He exposes the cultural foibles of the medical and hospital hierarchy, leaving no dirty stone unturned. Surgical delinquents such as Dr. Hodad (“hands-of-death-and-destruction”) are presented with detached accuracy, along with a clear list of reasons why the system fails to prevent the Hodads of the world from operating.
From the micro (individual physician mistakes) to the macro (trends in hospital safety breakdowns), Marty turns to survey data to make sense of the shortcomings. Interestingly, hospital “culture” (rated by its own employees) is the most predictive of overall hospital safety performance. Detailed record keeping of surgical complication rates correlates strongly with how employees rate their hospital on three simple questions:
1. Would you have your operation at the hospital in which you work?
2. Do you feel comfortable speaking up when you have a safety concern?
3. Does the teamwork here promote doing what’s right for the patient?
Marty’s conclusion that culture is the defining factor in patient safety and satisfaction ratings is both accurate and squishy. It’s difficult to create a reproducible template for a healthy work culture, and yet good culture is the basis for the success of hospitals such as the Mayo Clinic. Individual hospitals, like individual surgeons, have different personalities and temperaments. Raising them to be upstanding citizens involves a combination of good parenting and good luck.
Because I think Marty is absolutely right about culture as the foundation for safe and effective care, I think he’s also overly optimistic about the potential success of strategies to reproduce caring hospital cultures. By his own admission, not even the Mayo Clinic “mother ship” in Rochester, MN, has been able to create the exact level of quality care in its sister hospitals in Scottsdale, AZ, and Jacksonville, FL. So how can we dramatically improve patient care on a national level? Marty suggests that we need to find ways to force hospitals to become more transparent in order to revolutionize healthcare. His ideas include:
1. Mandatory hospital public reporting of patient re-admissions, complication rates, and never events.
2. Adoption of check lists by surgical teams to reduce errors.
3. Installation of video cameras throughout hospital floors and surgical suites so that staff behaviors can be monitored more effectively (e.g. to enforce hand washing or identify surgeons who have high error rates).
4. Accessible and transferable medical records that put patients at the center of their documentation.
While these ideas have merit, I believe they will fall short of achieving our ultimate goals. In my view, a culture of accountability is not the same as a culture of caring. Adopting certain “Big Brother” (cf. #3 above) strategies to pressure staff to behave/perform appropriately is only going to force the Hodads underground. We need staff to genuinely care enough about their patients to gang up on the Hodads and kick them out of the hospital for good. Caring doesn’t happen at a national level, it is personal and local. That’s why individual hospitals must develop their unique cultures for themselves, with progress measured by responses to those staff questions about whether or not they’d want to be cared for at their own institution.
I agree with Marty that hospital data transparency might be the best antiseptic we have to scrub the underbelly of medicine, though the ultimate success of our procedures will always be culture and surgeon-dependent. And that’s something you can’t regulate from Washington.
Marty’s book is available for purchase at Amazon.com.
Check out your local hospital safety scores from LeapFrogGroup.
1 Comment »
No matter the outcome of the presidential election this year, it’s likely that Americans will be spending more of their money on healthcare going forward. Dr. Davis Liu, a family physician at the Permanente Medical Group in California (and a contributor to this blog), has written a primer on how to get the most bang for your healthcare buck. The Thrifty Patient: Vital Insider Tips For Saving Money And Staying Healthy is a helpful little book for those smart enough to read it.
The first step to becoming a “thrifty patient” is to reduce your need for professional healthcare services. This lesson is perhaps the most important of all: lifestyle choices are the largest controllable determinant of how much healthcare you will consume. Daily exercise, healthy eating, and preventive care services (such as vaccines and screening tests) are the most effective ways to avoid expensive healthcare.
Dr. Liu offers tips for selecting a doctor, questioning the necessity of tests and procedures, choosing less expensive treatments, getting a second opinion, and learning to get the most out of a short doctor visit. He explains why annual check ups may not be necessary, and lists all the preventive health screening tests you’ll need (according to age) to maximize your chance of avoiding many major diseases or their expensive outcomes.
According to Liu, an excellent primary care physician (PCP) can be the best ally in avoiding unnecessary medical costs. Without a PCP’s guidance, 60% of patients select the wrong specialist for their symptoms or concerns. This can trigger a costly cascade of extra testing and referrals. Liu recommends trustworthy websites that can aid in disease management and patient education – suggesting that “Dr. Google” may not be so bad after all, armed with a correct diagnosis from a healthcare professional and links to credible sources of information.
Being thrifty isn’t necessarily “sexy” – but practical tips for avoiding unnecessary and expensive interactions with the healthcare system could add up to some pretty amazing savings (both financially and emotionally). Anyone who takes Dr. Liu’s advice to heart is likely to live longer and better – I just hope that the people who could benefit most from these tips find their way to this book. Perhaps you know someone who needs an early Christmas gift?
The Thrifty Patient can be purchased here on Amazon.com
2 Comments »
I just finished reading True Medical Detective Stories, Dr. Clifton Meador’s personal collection of medical mysteries. Dr. Meador is a prolific writer and the former dean of the University of Alabama School of Medicine and professor at Vanderbilt School of Medicine. His 50+ years in the academic arena have exposed him to some delightfully rare and bizarre medical cases, and he shares his top 18 in this pithy little book.
Dr. Meador was inspired by Berton Roueché, a staff writer at The New Yorker, who helped to popularize the medical detective story genre in the 1940′s and beyond. Each vignette is between 3-5 pages in length, making for a very quick and entertaining read. In choosing to review this book I was very tempted to give away details of some of the cases in order to entice you to read it, but I have resisted the urge so as not to spoil the fun.
Broadly speaking, the stories include a rare case of intractable hiccups, a bizarre infection caused by sexually deviant behavior, and several examples of the power of the mind to inflict bodily harm on oneself and others. In each situation, the underlying cause of the symptoms or disease is uncovered through careful listening and analysis. Often, human shame and fear must be managed before the truth can bubble to the surface.
I highly recommend this book to healthcare professionals, skeptics, and anyone interested in a fascinating look at some of the most unusual medical cases described in one book. Perhaps we can all learn to become better listeners, or true “medical detectives,” from Dr. Meador’s stories. You can find his book here at Amazon.com. Enjoy!
1 Comment »
I just finished reading a great little book called, “Which Comes First, Cardio Or Weights? Fitness Myths, Training Truths, And Other Surprising Discoveries From The Science Of Exercise” by Alex Hutchinson, Ph.D. I’m very grateful to Alex for patiently sifting through over 400 research studies in a quest to answer (with evidence, not subjective opinion) some of our most nagging exercise questions.
Alex is the perfect guy to do this exercise myth-busting as he is a competitive runner, professional journalist, and has a Ph.D. in physics. His writing is crisp, uncluttered, and bears the understated humor of a Canadian. To be honest, I enjoyed his book so much that I was contemplating blogging about most of his conclusions. However, I don’t want to teeter on the edge of copyright infringement, so I’ll just provide you with some highlights from my favorite sections of the book:
1. Do compression garments help you exercise? I’ve wondered this many times as I jiggled my way down the road on a long run. I’ve always liked the theory behind tight outer-garments, that they reduce unnecessary movement during running, thus making one’s movement more efficient and reducing the bounce and drag on muscles and skin. They may also help with blood return to the heart and reduction in peripheral edema, speeding recovery from exercise. Believing the plausibility of the argument, I have indeed sprung for some rather expensive running tights.
So what does the scientific literature have to say about compression garments’ role in exercise? Apparently there is nothing conclusive yet. Small studies have shown no clear improvement in exercise economy, athletic power or endurance, or recovery from exercise. The only measurable benefits appear to have occurred in those who believed that the compression garments would help their performance. A nice reminder of the importance of the “mind-body” connection in athletic pursuits. Bottom line: if you like how you feel in compression garments, by all means wear them. But don’t expect any dramatic improvements in anything more than your jiggle factor.
2. Will sitting too long at work counteract all my fitness gains? The short answer to this question is: possibly. I was surprised to note that at least one large study found that sitting for more than six hours per day increased one’s risk of death by 18-37% regardless of how much exercise one performed in the other eighteen hours of the day. Long periods of sitting appear to be quite bad for your health, so getting up and moving around every hour or more is important if you have a sedentary job or lifestyle.
3. Does listening to music or watching TV help or hurt my workout? Listening to faster-tempo music can result in increased exercise effort (in many cases completely unconsciously), while TV-watching usually results in a reduced exercise effort. This is because watching videos requires visual attention and subtle changes in balance and movement occur to accomplish it.
4. Will stretching help me avoid injuries? As a person with limited flexibility, I found this section of the book to be quite comforting. As I have blogged previously, stretching has not been shown to reduce the risk of injury or post-exercise soreness. In fact, it can decrease power and speed for certain athletes, though it is important for those who intend to perform great feats of flexibility (such as gymnastics).
5. Should I take pain killers for post-workout soreness? Interestingly, non-steroidal anti-inflammatory drugs (NSAIDs) are not particularly effective in reducing post-exercise pain and can even interfere with muscle repair. NSAIDs block prostaglandins, which are important in collagen synthesis. While NSAIDs are useful in reducing inflammation and swelling in acute injuries (such as an ankle sprain), general muscle soreness isn’t a good reason to pop some ibuprofen.
6. Will drinking coffee help or hinder my performance? I’m one of the few people I know who doesn’t drink coffee, so I was surprised to discover that I may have been missing out on an important exercise enhancer. According to decades of research, caffeine is likely to improve your exercise performance. Studies have shown that pure caffeine (not necessarily in its coffee form) enhances sprint performance as well as endurance activities up to two hours. In 2004 the World Anti-Doping Agency removed caffeine from its list of restricted substances, so expect to see some caffeinated athletes in this summer’s Olympics.
7. What’s the best way to breathe during exercise? If you’ve ever marveled at your own panting, you’ve also probably wondered if there is a more efficient way to breathe – or at least a less embarrassing way. The answer is no. Studies have shown that people who consciously work to make their breathing less labored expend more energy and get less oxygen in the process. So, keep on breathing the way your body wants to… you’re naturally more efficient at it than you think.
I hope that these little tidbits have whet your appetite for more of Alex’s excellent insights. I have fully equipped myself with fast-paced music and a little caffeine, as I move my inflexible, jiggly, panting self down the road on another long run.