Intelligence and the weight of evidence

The “weight of evidence” is a phrase included in the book The Neuroscience of Intelligence by Richard J. Haier (Cambridge University Press, 2017, New York).  In many areas of study including neuroscience research results may vary somewhat or even give opposite results. The concept of evidence-based medicine suggests we should trust the evidence but – which evidence if there is differing results? The National Clearinghouse Guidelines listed in a recent post were screened for quality of evidence – was there a preponderance of studies that had fairly similar results?

In the last post I mentioned that it was good news that the medical use of magnesium or Epsom salts was mentioned as early as the 17th century and written about in a medical journal in the early 1900’s – it suggests a preponderance of evidence – a “weight of evidence” regarding the medical benefit of magnesium.

In the introduction of the book The Neuroscience of Intelligence the author states that the information in the book is screened and included based on three laws that could be applied to most areas of scientific evidence – paraphrased:

  1. no story about medical evidence is simple;
  2. no one research study is adequate to prove a theory on its own;
  3. it generally takes many years to rule out conflicting and inconsistent research results and establish a weight of evidence. (p xiv, The Neuroscience of Intelligence,  Richard J. Haier)

The book is written for the non-neuroscientist who is interested in gaining an in depth overview of the advances made in the study of the intelligence and the brain for the purpose of general knowledge or for creating policies that are based on realistic expectations of human ability. There have been theories that have not been upheld when larger groups were involved. Intelligence can be affected positively or negatively by early childhood experiences and by better nutrition however  by later adolescence and adulthood years the differences are more affected by genetic potential whether parents were rich or poor, whether schools were average or above average. Many genes are involved however, affecting many pathways throughout the brain. Intelligence and creativity isn’t just located in the frontal area of the brain or in just the right hemisphere.

From a magnesium perspective an interesting point that stood out for me was on page 61. Genes that have been found to be involved in intelligence include several that encode glutamate receptors. Background information: Alzheimer’s disease tends to cause more damage in areas of the brain that have a greater number of glutamate receptors – and adequate magnesium is necessary to help protect brain cells from being overexcited by too much glutamate (an amino acid used in flavoring agents, a commonly known type is MSG, Mono sodium glutamate). Glutamate can open the receptors in the cell membranes while the presence of magnesium inside of the cell can keep them closed. NMDA receptors are discussed on pages 101-102 of the book Magnesium and the Central Nervous System and is mentioned 249 times in the book, (the ebook has a useful search feature). (2) 

Excess calcium being allowed to enter the cell can also overexcite cells to the point of cell death. Too much or too little activity of the NMDA receptors can cause problems with health or damage cells. Overexcitatory activity of the NMDA receptors has been associated with damage from ischemic stroke, traumatic brain injury, neonatal brain injury, and neurodegenerative conditions (which include Alzheimer’s Disease, p 104, (2)). Too much magnesium has been known to cause neonatal brain injury when given intravenously or intramuscularly for the expectant mother during preeclampsia/eclampsia to reduce seizures (3), or for other causes of preterm labor – some magnesium is protective for the fetal brain but too much can negatively affect fetal brain cells. (p103, Mg & the CNS, (2)) 

On page 61 of the book The Neuroscience of Intelligence (1)  genes involved with pathways that influence  glutamate binding with NMDA receptors are mentioned including KNCMA1, NRXN1, POU2F3, and SCRT. (1Both books mention that the NMDA receptors and glutamate as a neurotransmitter are involved with learning and memory. (p101, 2) 

A brief look at what might be known about those genes suggests differences in them may be associated with spasticity, (4), “epilepsy, ataxia, mental retardation, and chronic pain,” (7), alcohol abuse, (5), cervical cancer, (6), – a wide variety of conditions not just learning and memory. Take home point – magnesium is important for learning and memory and general health in an adequate amount, but not excessive amount if given intravenously or intramuscularly.

/Disclosure: This information is provided for educational purposes within the guidelines of fair use. While I am a Registered Dietitian this information is not intended to provide individual health guidance. Please see a health professional for individual health care purposes./ 

  1. Richard J. Haier, The Neuroscience of Intelligence, (Cambridge University Press, 2017, New York), http://www.richardhaier.com/the-neuroscience-of-intelligence/ (1)
  2. Robert Vink, Mihai Nechifor, editors, Magnesium in the Central Nervous System, University of Adelaide Press, 2011, adelaide.edu.au, free ebook pdf, https://www.adelaide.edu.au/press/titles/magnesium/magnesium-ebook.pdf  (2) 
  3. Magnesium Sulfate for Seizure Prevention During Pregnancy, American College of Cardiology,  cardiosmart.org,   https://www.cardiosmart.org/healthwise/hw67/281/hw67281 (3)
  4. Baker D., Big conductance calcium-activated potassium channel openers control spasticity without sedation., Queen Mary University of London, https://qmro.qmul.ac.uk/xmlui/bitstream/handle/123456789/24743/BakerBigconductance2017accepted.pdf?sequence=1 (4)
  5. Jill C. Bettinger, Andrew G. Davies, The role of the BK channel in ethanol response behaviors: evidence from model organism and human studies. Front. Physiol., 09 September 2014,   https://www.frontiersin.org/articles/10.3389/fphys.2014.00346/full (5)
  6. Z Zhang, PC Huettner, L Nguyen, M Bidder, MC Funk, J Li, JS Rader, Aberrant promoter methylation and silencing of the POU2F3 gene in cervical cancer, Oncogene vol 25, pp 5436–5445 (31 August 2006), https://www.nature.com/articles/1209530 (6)
  7. C. Contet, S. P. Goulding, D. A. Kuljis, and A. L. Barth, BK Channels in the Central Nervous System, Europe PMC Article,  Int Rev Neurobiol. 2016; 128: 281–342. http://europepmc.org/articles/PMC4902275/ (7)

 

AHRQ’s National Guideline Clearinghouse (NGC) website has closed; archive list available here.

The U.S. Agency for Healthcare Research & Quality (AHRQ) closed a site they managed, guidelines.gov – National Guideline Clearinghouse, (NGC), due to insufficient funding. It was a collection of medical care guidelines from many different organizations screened for quality and available with a variety of search options.

Written material by U.S. government agencies can be shared for non-profit educational purposes within the guidelines of Fair Use. Copies of the collected list of medical guidelines are available here. I hope to add links to the original material but in the meantime readers can look up the links for themselves. The statement about the change can be seen on the ahrq.gov site. I left the original links in the list of collected guidelines but they all go to the same statement now instead of to the original page on the guidelines.gov site.

Guideline Summary Categories included 15 areas of medical practice:

  1. Cardiology . . . . . . . . . . . . . . . . . . . . . . . . . 23 files : Cardiology [archive list, 7/16/18]
  2. Critical Care  . . . . . . . . . . . . . . . . . . . . . . . 24 files : Critical Care [archive list]
  3. Emergency Medicine   . . . . . . . . . . . . . 39 files : Emergency Med [archive list]
  4. Family Practice . . . . . . . . . . . . . . . . . . . . 170 files : Family Practice [archive list]
  5. Geriatrics  . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 files : Geriatrics [archive list, 7/16/18]
  6. Infectious Diseases . . . . . . . . . . . . . . . . . 24 files : Infectious Disease [archive list]
  7. Internal Medicine . . . . . . . . . . . . . . . . . . 158 files : Internal Med [archive list]
  8. Nursing . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  47 files : Nursing [archive list, 7/16/18]
  9. Obstetrics & Gynecology  . . . . . . . . . .  50 files : Ob & Gyn [archive list, 7/16/18]
  10. Oncology . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 files : Oncology [archive list, 7/16/18]
  11. Orthopedic Surgery . . . . . . . . . . . . . . . . . 24 files : Orth. Surgergy [archive list]
  12. Pediatrics . . . . . . . . . . . . . . . . . . . . . . . . . . . .73 files : Pediatrics [archive list, 7/16/18]
  13. Physical Medicine & Rehabilitation . 28 files : Phys Med & Rehab [archive list]
  14. Psychiatry . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 files : Psychiatry [archive list, 7/16/18]
  15. Surgery  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 files : Surgery [archive list, 7/16/18]

I also copied the Expert Commentary section but will have to post links after reformatting in a numbered list for ease of use.

/Disclaimer: This information is provided for educational purposes within the guidelines of fair use. While I am a Registered Dietitian this information is not intended to provide individual health guidance. Please see a health professional for individual health care purposes. Thanks./

Make every day Kidney Appreciation Day

In case you missed World Kidney Day (March) today is a good day to appreciate kidney health. The pair of kidneys or single kidney clean the body of daily acidic waste from metabolism and dietary sources and remove other excess minerals and toxins. Adequate water is essential for kidney health as dehydration can cause damage that may not be reversible.

The amount of water a person needs per day varies with the size of the person and the amount of heat, humidity and exercise they experience throughout their day. The eight cups per day for an average person is just an estimate based on typical conditions and average size. Dr. Batmanghelidj specialized in water needs for chronic illness or general health and his rough guideline for adults was to aim to drink ounces of water per day equal to half your body weight (in pounds), so a 150 pound adult might benefit from drinking 75 ounces of water per day ~ about 9 cups of water. The fluid content of herbal tea, juice, milk, or soup would be helping reach the goal, while a diuretic type fluid like coffee or caffeinated black or green teas, or alcoholic beverages would not. His book is older and the validity of some of his theories have been questioned but as a fairly easy to follow overview of the importance of water to health, it is helpful. (Your Body’s Many Cries for Water, pdf)

For more information on the chemistry of water see the collected work on the topic by Martin Chaplin (Water Structure Science), a review of inorganic, organic and biochemistry and physics will be helpful first – I’ve only read a few sections and it is fascinating but slow going. The author explains with enough detail and graphs that even lacking the review of the college courses some of the information can be understood.

For more information on healthy diet for general health or aging and the prevention of chronic kidney or vascular disease see the recently published article about nutrition for health written by a nephrologist. A recent review of organic and biochemistry will be helpful but again some of the basic concepts can be picked up from the thorough description of the issues that may be causing chronic illness and chronic kidney disease.

The summary points – excess protein and sodium and acid producing foods is tasking on the kidneys and may increase risk of chronic illness while adequate to plentiful amounts of potassium rich vegetables and fruit is protective.

How much is considered excess protein?: “The average American consumes 1.2 gm protein/kg/day [23], exceeding the recommended intake (~0.8–1.0 gm/kg/day) for a healthy adult.” (1)

Math – the 150 pound average person is about 68 kilograms (kg) and is averaging an intake of 82 grams of protein per day (1.2 gm/kg/day) instead of the recommended range of 54.4-68 grams per day. For perspective to daily meals – 8 ounces of milk contains about 8 grams of protein, one ounce of meat or one egg or a half cup of beans, about 7 grams, one piece of bread, about 2-3 grams. (Protein content of foods, Today’s Dietitian)

Second only to anyone who doesn’t keep children in cages – nephrologists(kidney/renal health specialists) are my favorite people. The author of the article is saying with a lot of detail that prevention is the best medicine. Treat yourself to healthy habits and you may be lucky enough to never need to meet a nephrologist as a patient. Diets for kidney dialysis patients are extremely restrictive.

Mark your calendars – World Kidney Day 2019 is planned for March 14th. (World Kidney Day)

  • For more information about kidney disease and risk factors see “Who Lives, Who Dies with Kidney Disease,” by Mohammad Akmal and Vasandhara Raghaven, (2018), amazon.com. The book includes personal stories of a variety of patients, real, with some names and identifying details changed for anonymity, starting with some of the first patients diagnosed and treated with kidney dialysis or kidney transplants. The stories may inspire and may leave you reaching for a tissue for tears – they may leave you appreciating kidney health for you and your loved ones and the pioneers who have made treatment more possible. Kidney donors are also worthy of appreciation, today and everyday. The latter part of the book includes an overview of chronic and acute conditions that place [patients more at risk for developing kidney disease, preventative care that may help and current medical treatments that are available.

Addition, Oct. 9, 2020,  elevated blood sugar is also a risk that can lead to irreversible kidney damage. Bitter taste receptors are found within the kidney and are involved in clearance of calcium. They are also found in the intestinal tract and help tell us we are satisfied after a meal or snack that contains bitter tasting phytonutrients.

  • In order for the body to produce bitter or other types of taste and odor receptors we need to have adequate zinc as it is involved in mRNA production of the receptor protein chain. See the post Zinc… for more information and reference list.

    Zinc – big news, CoV and other illness related. (Sept. 27, 2020)

  • In order for the bitter taste receptors to be activated and function we need to eat bitter tasting nutrients – and then we can have better appetite control and they are also involved in better blood sugar control – and the kidney function.

Diabetic Kidney Disease

This video by a nephrologist, Dr. Jason Fung, is easy to follow along regarding the risk of high blood sugar for kidney health and how excess protein while fine for someone with normal kidney function, may worsen the health of someone’s kidneys when there is already some loss of renal function. He does not mention the benefit or need for zinc or bitter tasting nutrients in the diet for appetite and blood sugar or kidney function, however. Those are fairly new areas of research.  – Dr. Jason Fung on Diabetic Kidney Disease.

Disclaimer: Opinions are my own and the information is provided for educational purposes within the guidelines of fair use. While I am a Registered Dietitian this information is not intended to provide individual health guidance. Please see a health professional for individual health care purposes. Thanks.

  1. Qi Qian, Dietary Influence on Body Fluid Acid-Base and Volume Balance: The Deleterious “Norm” Furthers and Cloaks Subclinical Pathophysiology, Nutrients 2018, 10(6), 778; Open Access, http://www.mdpi.com/2072-6643/10/6/778/htm  (1)
  2.  Fereydoon Batmanghelidj, M.D., Your Body’s Many Cries for Water, Global Health Solutions, Inc.; Third Ed. (November 1, 2008), https://www.amazon.com/Your-Bodys-Many-Cries-Water/dp/0970245882/ (2), http://www.cci-coral-club.okis.ru/file/cci-coral-club/knigi/FereydoonBatmanghelidj_Your_Bodys_Many_Cries_for_Water_eng.pdf (pdf)
  3. Martin Chaplin, BSc, PhD, CChem, FRSC, Water Structure Science: a website concerned with the physical, chemical and biological properties of water., London South Bank University, (Water Structure Science)   http://www1.lsbu.ac.uk/water/water_structure_science.html (3
  4. Protein Content of Foods, webinar pdf, Today’s Dietitian, (Protein content of foods, Today’s Dietitian)   http://www.todaysdietitian.com/pdf/webinars/ProteinContentofFoods.pdf (4)
  5. World Kidney Day 2019, cute-calendar.com, (World Kidney Dayhttps://www.cute-calendar.com/event/world-kidney-day/33701.html (5)

Translational Research – translating research into patient care strategies

“The answer is 17 years, what is the question: understanding time lags in translational research” – Morris, et al, 2011 (1)

It takes far too long for research findings to be ‘translated’ into health messages or techniques that reach the patient in need of health care guidance – 17 years on average according to the review of research study by Morris et al (2011). The team’s conclusion is that translational research is in need of further study but with more well defined terms and types of measurements so research by different teams can be compared. Twenty three studies were reviewed but the research parameters were diverse and not readily comparable. (1)

As a person with training and experience as a health care professional I followed general recommendations for general health and weight loss for many years but they didn’t help and I kept getting more sick with problems that didn’t show up on lab tests. Being told regularly that my symptoms must therefore be psychosomatic (mentally based) and that I should see a talk therapist did lead me to spending time with talk therapists and it helped somewhat but I kept getting more sick.

I knew I was physically sick, not just mentally making myself sick from stress or anxiety because I wasn’t always stressed or anxious and had always had some minor but chronic health problems as a child. So I eventually gave up on the standard not-helping-much answers and instead paid closer attention to my daily routine and dietary choices and slowly stopped doing any of the things that seemed to make me feel worse the next day. With the pay attention method I got somewhat better. Fibromyalgia and chronic fatigue symptoms were improved. Iodine supplements helped me with weight loss and a low dose antibiotic protocol developed for an autoimmune type of condition helped relieve my severe migraine problem.

Prescriptions can be quick and easy answers but they don’t always work, sometimes makes things worse, can delay trying other strategies that might work better – and can be expensive in insurance co-pays or be an out of pocket self pay expense. Health needs adequate sleep, with black out curtains and no lights, not even a digital alarm clock – keep it in a bedside table drawer or cover it with a towel. Even a little light at night can interfere with our production of melatonin and it helps with a variety of health needs throughout the body.

Health requires regular stretching and exercise that works out the heart and lungs and builds the other muscles somewhat. To maintain bone density requires weight bearing exercise – lifting weights in a warehouse or digging in a garden or in a gymnasium. Having the freedom to read text documents on your laptop while standing and using hand weights can multitask physical fitness needs with work or school needs. Varying positions and going for short walks occasionally is healthier than any type of job that requires too much of the same motions or having to stay in the same position for long periods of time.

Standing desks that can easily transition to a sitting desk can be as simple as a couple boxes under your laptop. Standing can allow some leg and arm stretches and then the boxes can be removed for some time spent sitting to type more intensively. Eight full hours in either position might be more of a health risk than being able to switch between the two options. (2)

Health requires all of the nutrients and additional fiber and antioxidants and other phytonutrients that aren’t considered essential in the same way vitamins are but may be necessary for more optimal health.

If it is reasonable to want to prevent measles or chickenpox, or other infectious diseases, then it seems reasonable to want to prevent age related degenerative disease by providing the body more of what it needs to remove toxins and rebuild tissue as it wears out. Even brain cells are replaced with new ones  – our entire body is not the same body that we had as a newborn. We are regularly removing old cells and growing new ones.

All truths are easy to understand once they are discovered. The point is to discover them. ~ Galileo

And the point of translational research is to improve the process of translating research findings into effective strategies for patient care. If research is still in early stages it may not be safe for all patients, finding out how to identify which patients it might help would then be a necessary step before translating the findings into patient education messages or health care protocols. How to guides ideally will always include safety warnings about which patients the health messages might harm if they were to use or be ineffective for their use.

As an individual it is good to know your rights as a patient and to seek health care professionals that take the time to listen. As a patient seeking a second opinion may be helpful and it can be helpful to write down your symptoms and mood changes, your daily diet or sleep habits, and any other routine habits in order to look back occasionally to see if any patterns show up in what is helping or not helping you feel better. We all need to remember that we are the ones living our lives and that makes us the ones in charge of taking care of our own health as best as we can.

It can take three weeks or more to build a habit and that suggests the reverse is likely true – and keeping a written tally sheet about the habit you want to change can help stay on track and help show where you may be veering off track. For more guidance, see Changing Habits, The Learning Center, University of North Carolina. (3)

Your Health Insurance agent is not your mother (probably), and in the current system large bills can lead to more profit for health insurance companies – so watch out for your  own budget by taking care of exercise, diet, and sleep habits and send your Health Insurance agent a nice card at the holidays instead of having them on speed dial for questions about your enormous co-pays. Insurance is nice but 10 or 20% of an enormous bill is still more than most of us have in the bank or can easily borrow. (4)

Bankruptcy due to health care costs has become too common – stay out of bankruptcy court by spending more time on daily health care habits – the research is fairly conclusive regarding the basics –

  • ideally at least 30-60 minutes of exercise 3-5 times per week,
  • drink plenty of water for thirst
  • and eat 5-9 servings of vegetables/whole fruit per day, get adequate protein, whole grains and essential omega 3 fatty acids without too much saturated and trans fats each day. Trying to include a serving of fatty fish three times per week can be a source of omega 3 fatty acids or vegetarian sources include walnuts, hemp seed kernels or ground flax seeds. Including a serving of beans, nuts and seeds on most days may increase the amount of magnesium and other important trace nutrients in the daily/weekly diet.
  • Six hours of sleep seems to be a minimum need for most people and more than eight hours on a regular basis may be too much or a sign of health or depression problems in adults once they are out of the teen years, (teens may benefit from ten hours of sleep per day, (6)). Short naps during the day can be a healthful activity and may increase work productivity, 20-30 minutes may be ideal. Longer naps may lead to waking up groggy instead of refreshed. (5)
  • Social activity and other relaxing hobbies also seem to be helpful for health.

/Disclaimer: This information is provided for educational purposes within the guidelines of fair use. While I am a Registered Dietitian this information is not intended to provide individual health guidance. Please see a health professional for individual health care purposes. Thanks./

  1. Zoë Slote Morris, Steven Wooding, and Jonathan Grant,

    The answer is 17 years, what is the question: understanding time lags in translational research., J R Soc Med. 2011 Dec; 104(12): 510–520. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3241518/

  2. Robert H. Shmerling, MD, The Truth Behind Standing Desks, Sept. 23, 2016, Harvard Health Blog, Harvard Health Publishing, health.harvard.edu,  https://www.health.harvard.edu/blog/the-truth-behind-standing-desks-2016092310264?utm_campaign=shareaholic&utm_medium=twitter&utm_source=socialnetwork
  3. Changing Habits, The Learning Center, University of North Carolina, https://learningcenter.unc.edu/tips-and-tools/changing-habits/
  4. Why Your Health Insurer Doesn’t Care About Your Big Bills, propublica.org, https://www.propublica.org/article/why-your-health-insurer-does-not-care-about-your-big-bills
  5. Napping, sleepfoundation.org, https://sleepfoundation.org/sleep-topics/napping
  6. See Chapter Two: The Lost Hour, Po Bronson and Ashley Merryman, NurtureShock: New Thinking About Children, Twelve, Hatchette Book Group, New York, 2009 http://www.nurtureshock.com/

Additional references for more information on translational medicine:

Excerpt from a post about my own genetic screening (Genetic Screening can give guidance about potential medication adverse reactions, 2018):

Additional reference for further discussion of the advances in the use of genetic screenings for medication risk is available in a book that is already slightly dated with the rapid advances in technology but as a starting point it is helpful for an overview on the history of technological advances in the area of medical care: The Creative Destruction of Medicine: How the Digital Revolution will Create Better Health Care, by Eric Topol, M.D., 2013. Basic Books. ISBN: 978-0465061839. (1) (“Book Review…,” and summary, by Jung A Kim, RN, PhD, PubMed_2)

One of the pioneers in personal genetic screening was Esther Dyson, a venture capitalist. She quoted a colleague regarding why she agreed to be one of the first ten participants in the Personal Genome Project:

“You would no more take a drug without knowing the relevant data from your genome than you would get a blood transfusion without knowing your blood type.” [128] (1)

The future of individualized health care will include genetic screening for everyone and what isn’t addressed in the book by cardiologist and translational research specialist Eric Topol, M.D. is the use of genetic screening for individualized nutrition guidance. In addition to discovering what medications may work better or be more dangerous for an individual genetic screening can target which types of exercise or diet plans may be more or less beneficial and which nutrients may need to be restricted or supplemented more than the average guidance.

My previous genetic screening was for fewer genes but which were chosen as most commonly a problem for children on the autism spectrum – I had 11 of the 30 and the guidance led to supplements and diet changes that have helped me feel better and have better mood stability – Methylation Cycle Defects – in me, Genetic Screening “For Research Purposes Only” – at this stage “For Research Purposes Only” is a legal phrase as genetic screening is not considered consistent enough for use as a diagnostic tool, but my personal health is of significant interest to me.

  1. Eric Topol, M.D,, The Creative Destruction of Medicine: How the Digital Revolution will Create Better Health Care, 2013. Basic Books. ISBN: 978-0465061839.  (1) Chapter 5, Biology: Sequencing the Genome, page 117: [128]
  2. Jung A Kim, RN, PhD, Book Review: The Creative Destruction of Medicine: How the Digital Revolution will Create Better Health CareHealth Inform Res. 2013 Sep; 19(3): 229–231.  https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3810531/ PubMed_2)

[128] Esther Dyson, “Full Disclosure,” Wall Street Journal, July 25, 2007, A15.