Author Interviews, Cognitive Issues, Environmental Risks, NIH, Pediatrics / 27.08.2024
NIEHS Examines Link Between Flouride in Water and IQ in Children
MedicalResearch.com Interview with:
Rick Woychik, Ph.D.
Director of the National Toxicology Program
Director of the National Institute of Environmental Health Sciences
Principal Investigator
Mammalian Genome Research Group
Division for Intramural Research at NIEHS
MedicalResearch.com: What is the background for this study?
[caption id="attachment_62975" align="alignleft" width="200"] Source[/caption]
Response: Since 1945, the use of fluoride has been a successful public health initiative for reducing dental cavities and improving general oral health of adults and children. There is a concern, however, that some pregnant women and children may be getting more fluoride than they need because they now get fluoride from many sources including treated public water, water-added foods and beverages, teas, toothpaste, floss, and mouthwash, and the combined total intake of fluoride may exceed safe amounts.
Therefore, the National Toxicology Program (NTP) conducted a systematic review of the published scientific literature on the association between fluoride exposure and neurodevelopment and cognition. The NTP released their findings in a State of the Science Monograph on August 21, 2024, and posted to the NTP website. A corresponding meta-analysis on children’s IQ has been accepted by a scientific journal for publication later in 2024.
The NTP started this work in 2016. As with all research documents intended for publication, the NTP fluoride monograph and meta-analysis underwent rigorous scientific evaluation. The evaluation process has involved many steps. The draft fluoride monograph received significant critical feedback during peer-review by the National Academies of Science, Engineering and Medicine (NASEM), from other external experts, and from experts in several federal health agencies. After modifications were made, additional evaluation following a rigorous scientific framework was conducted by subject matter experts organized by the NTP Board of Scientific Counselors. I am very pleased that this document is now complete and available for reference.
Since fluoride is such an important topic to the public and to public health officials, it was imperative that we made every effort to get the science right. I commend the report authors, the NTP Board of Scientific Counselors, and countless subject matter experts who participated in this evaluation. The monograph represents a thorough review of the data, and the various interpretations of the data, to accurately reflect what we know and where additional research is needed.
Source[/caption]
Response: Since 1945, the use of fluoride has been a successful public health initiative for reducing dental cavities and improving general oral health of adults and children. There is a concern, however, that some pregnant women and children may be getting more fluoride than they need because they now get fluoride from many sources including treated public water, water-added foods and beverages, teas, toothpaste, floss, and mouthwash, and the combined total intake of fluoride may exceed safe amounts.
Therefore, the National Toxicology Program (NTP) conducted a systematic review of the published scientific literature on the association between fluoride exposure and neurodevelopment and cognition. The NTP released their findings in a State of the Science Monograph on August 21, 2024, and posted to the NTP website. A corresponding meta-analysis on children’s IQ has been accepted by a scientific journal for publication later in 2024.
The NTP started this work in 2016. As with all research documents intended for publication, the NTP fluoride monograph and meta-analysis underwent rigorous scientific evaluation. The evaluation process has involved many steps. The draft fluoride monograph received significant critical feedback during peer-review by the National Academies of Science, Engineering and Medicine (NASEM), from other external experts, and from experts in several federal health agencies. After modifications were made, additional evaluation following a rigorous scientific framework was conducted by subject matter experts organized by the NTP Board of Scientific Counselors. I am very pleased that this document is now complete and available for reference.
Since fluoride is such an important topic to the public and to public health officials, it was imperative that we made every effort to get the science right. I commend the report authors, the NTP Board of Scientific Counselors, and countless subject matter experts who participated in this evaluation. The monograph represents a thorough review of the data, and the various interpretations of the data, to accurately reflect what we know and where additional research is needed.
Dr. Walsh[/caption]
Christopher Walsh, M.D., Ph.D.
Chief, Division of Genetics and Genomics
Bullard Professor of Pediatrics and Neurology at Harvard Medical School
and researcher who has used material donated to the brain bank
MedicalResearch.com: What is the background for this study?
Response: Many different types of genetic variants contribute to neurodevelopmental disorders such as autism. Copy number variants are large pieces of genetic material that are duplicated or deleted. We have known for many years that many copy number variants at certain genetic locations are linked to autism. Because these copy number variants may include lots of different genes, it has been difficult to understand how these copy number variants alter human brain function. Furthermore, although animal models are important, autism is in many ways defined by differences in uniquely human cognitive and social functioning. Better understanding of how these copy number variants change human brain function will shed light on universal mechanisms that regulate neurodevelopment. We studied a copy number variant called dup15q, that is associated with almost 40-fold higher rates of autism vs. the general population. We studied post-mortem human brain tissue from individuals with dup15q, individuals with autism not related to dup15q, and neurotypical controls, to better understand how the human brain is impacted by dup15q. We focused on frontal cortex, an important brain region in executive function and social perspective taking. We applied cutting edge techniques that allow us to assess individual cells in the brain. 
Dr. Davis[/caption]
Esa M. Davis, M.D., M.P.H , F.A.A.F.P
Professor of Medicine and Family and Community Medicine
Associate Vice President of Community Health and
Senior Associate Dean of pPopulation Health and Community Medicine
University of Maryland School of Medicine
Dr. Davis joined the U.S. Preventive Services Task Force in January 2021
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Iron is important to overall health, and people need more iron when they are pregnant. This can make pregnant people at increased risk for iron deficiency, which can progress to anemia and cause complications for both moms and their babies. After reviewing the latest available research, the Task Force found that there is not enough evidence on whether pregnant people who do not have signs or symptoms of iron deficiency or anemia should be screened—or take iron supplements—to improve their health or the health of their baby. 
Dr. Oliva[/caption]
Azahara Oliva PhD
Assistant Professor
Department of Neurobiology and Behavior
Cornell University
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: The background is that we knew for a while now that neurons work hard to consolidate into memories each experience that we have during the day. But at the same time, it is known that sleep restore activity of our body and physiology. How was that possible? How can the neurons in our brain "work hard" during the time that we are supposed to be restoring our vitals? We found that in between their hard work, during sleep, our neurons take "breaks of activity" so our brain can build memories with precision.
Elena Stains
Medical Student
Department of Medical Education
Geisinger Commonwealth School of Medicine
Scranton, PA
MedicalResearch.com: What is the background for this study?
Response: Opioid use has been an increasing problem since the early 2000s in the United States (US) with a surge around 2010. Twenty-five percent of those having abused pain relievers in 2013 and 2014 got those drugs from physicians1. Physicians are particularly well-known for fueling the opioid crisis in Florida in the 2000s. Of the United States’ top 100 opioid prescribing physicians in 2010, an astounding 98 were prescribing in Florida2. Florida taking the main stage of the opioid crisis can be attributed to several factors, including ability of physicians to dispense opioids directly from their offices to patients (i.e. without pharmacists) and the presence of many infamous “pill mills” in the state3–6.
The researchers at Geisinger Commonwealth School of Medicine aimed to analyze the amount of hydrocodone (including brand names of Vicodin and Lortab) and oxycodone (OxyContin and Percocet) distributed in Florida from 2006 to 2021, paying close attention to the peak year of the opioid crisis, 2010. The team used the Washington Post and the US Drug Enforcement Administration’s Automation of Reports and Consolidated Orders System (ARCOS) databases to compile this compelling information.
Dr. Hagobian[/caption]
Todd Hagobian, Ph.D.
pronouns he/him/his
Department Chair & Professor, Kinesiology and Public Health
Cal Poly, San Luis Obispo, CA
MedicalResearch.com: What is the background for this study?
Response: Previous observational studies have shown that urinary BPA is related to Type 2 diabetes risk. Meaning, higher urinary BPA is related to an increased risk of Type 2 diabetes. However, no published study to date has determined whether several days of BPA administration (participants consume BPA) increases the risk of Type 2 diabetes.
MedicalResearch.com: Where is bisphenol found? Can exposure to bisphenol be limited in everyday life?
Response: BPA and other bisphenols are found in canned foods and plastics. BPA is one of the most widely used synthetic chemicals and we consume foods that are packed in this chemical. Most of BPA exposure comes from canned foods, and 93% of the US populations has detectable urine levels of BPA. We can limit BPA by reducing canned foods (or purchased BPA free cans) and plastic use.
Dr. LaMoreaux[/caption]
Brian LaMoreaux, MD, MS
Internist and Rheumatologist
Executive Medical Director, Amgen
MedicalResearch.com: What is the background for this study? How does KRYSTEXXA® (pegloticase) work in gout?
Response: Many other diseases in gout have well-defined definitions of remission, but gout has lagged behind on this. With systemic consequences of gout becoming more apparent, the concept of treating gout to remission is increasing important to improving patient care and preserving patient health.
