Table of contents
- Exposure to PFAS Linked to 13 Medical Conditions - July 2022
- PFOA, PFASS may also reduce actvation of VDR and other genes
- PFAS ‘Forever Chemicals’ Are in Your Popcorn—and Your Blood - Oct 2019
- PFOA associated with lower Vitamin D Levels - March 2019
- PFAS associated with 2X higher risk of fracture in young men – Sept 2019
- Per- and Polyfluoroalkyl Substances (PFAS) and Your Health - CDC 2019
- Iodine reduces Fluorine - which may be the PFAS problem
- "The resulting economic burden is estimated to cost Americans a minimum of $5.5 billion and as much as $63 billion over the lifetime of the current population."
- Childhood obesity = $2.7 billion. Hypothyroidism in women = $1.26 billion.
- "The study investigators also expanded the scope of their economic estimates to include eight other conditions with preliminary links to PFAS exposure, including endometriosis, obesity in adults, and pneumonia in children. When such diseases were considered, the total costs reached as high as $63 billion."
Study = Leveraging Systematic Reviews to Explore Disease Burden and Costs of Per- and Polyfluoroalkyl Substance Exposures in the United States
Table of Contents
Subset of analysis
Affects the VDR and other genes
VDR as a Potential Target for the Toxic Effects of Per- and Polyfluoroalkyl Substances (Pfass) - June 2022
Download the pre-print PDF from VitaminDWiki
Computational modeling predicts that a large number of PFASs of commercial and regulatory
importance may impact the function of the vitamin D receptor and interfere with the beneficial
effects of vitamin D3. This may lead to increased osteoporosis and impaired immune function, two
adverse effects that have been observed in epidemiological studies of humans exposed to PFASs.
validation of these in silico findings should be a high priority
Does not seem to indicate the size of the impact
” Food packaging can contain a group of chemicals called PFAS, which have been linked to immune, thyroid, kidney, and reproductive health problems.”
- “Per- and polyfluoroalkyl substances are a group of about 4,700 chemicals that make carpets and upholstery stain-resistant and help firefighters douse burning oil and gas. Some PFAS versions keep your burger from sticking to its fast-food wrapper and your salad from turning its fiber-based bowl into a soggy mess.”
- BPA is a possible cause of obesity epidemic - Dr. Greger June 2019
- Endocrine Disrupting Chemicals - book April 2019
PFAS may not be as bad as
- Cooked dried beans or peas (pulses) reduce uptake of Vitamin D, Vitamin K by half – March 2019
- Plastics, BPA, PCB and Vitamin D deficiency
- Increase of plastic compounds (phthalates) in urine during pregnancy associated with decreased Vitamin D – Aug 2017
- PCBs increased the chance of being Vitamin D deficient by 3 percent – May 2013
Associations of serum perfluoroalkyl substance and vitamin D biomarker concentrations in NHANES, 2003-2010
Int J Hyg Environ Health. 2019 Mar;222(2):262-269. doi: 10.1016/j.ijheh.2018.11.003. Epub 2018 Nov 28.
Etzel TM1, Braun JM2, Buckley JP3.
- 1 Department of Environmental Health & Engineering, Johns Hopkins Bloomberg School of Public Health, 615 N. Wolfe Street, Baltimore, MD, 21215, USA. Electronic address: tetzel2 at jhmi.edu.
- 2 Department of Epidemiology, Brown University School of Public Health, 121 South Main Street, Providence, RI, 02920, USA. Electronic address: joseph_braun_1 at brown.edu.
- 3 Department of Environmental Health & Engineering, Johns Hopkins Bloomberg School of Public Health, 615 N. Wolfe Street, Baltimore, MD, 21215, USA; Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, 615 N. Wolfe Street, Baltimore, MD, 21215, USA. Electronic address: jbuckl19 at jhu.edu.
Perfluoroalkyl substances (PFAS) are persistent endocrine disrupting chemicals found in industrial and commercial products. Previous research has shown that other endocrine disrupting chemicals such as phthalates and bisphenol A may alter circulating levels of vitamin D; however, no research has examined associations between PFAS and vitamin D biomarkers. We conducted a cross-sectional analysis of 7040 individuals aged 12 years and older participating in the 2003-2010 cycles of the United States National Health and Nutrition Examination Survey (NHANES). Concentrations of perfluorooctanoic acid (PFOA), perfluorooctane sulfonic acid (PFOS), perfluorohexane sulfonic acid (PFHxS), perfluorononanoic acid (PFNA), and total 25-hydroxyvitamin D [25(OH)D] were measured in serum samples. We used multivariable linear regression to estimate covariate-adjusted differences in total 25(OH)D or prevalence odds of vitamin D deficiency per log2 change in PFAS concentrations. We also assessed potential effect measure modification by gender, age, and race/ethnicity. PFAS were detected in over 98% of the samples. In adjusted models, each 2-fold increase in PFOS was associated with 0.9 nmol/L (95% CI: 0.2, 1.5) lower total 25(OH)D concentrations, with associations significantly stronger among whites (β: -1.7; 95% CI: -2.6, -0.7) and individuals older than 60 years of age (β: -1.7; 95% CI: -2.9, -0.5). Each 2-fold increase in PFHxS was associated with 0.8 nmol/L (95% CI: 0.3, 1.3) higher total 25(OH)D, and this association was not modified by age, gender, and race/ethnicity. PFOA and PFNA were not associated with total 25(OH)D. When assessing prevalence odds of vitamin D deficiency, we observed similar patterns of association with PFAS concentrations. Our results suggest that some PFAS may be associated with altered vitamin D levels in the United States population, and associations may vary by chemical, age, and race/ethnicity. Prospective epidemiological studies are needed to confirm our findings and determine their implications for vitamin D-associated health outcomes in children and adults.
Perfluoroalkyl substances and bone health in young men: a pilot study
A. Di NisioM. De Rocco PonceA. GiadoneM. S. RoccaD. GuidolinC. Foresta
Download the PDF from Sci-Hub via VitaminDWiki
Perfluoroalkyl substances (PFAS) are a class of endocrine-disrupting chemicals. Toxicological studies indicate that PFAS accumulates in bone tissue and could cause alterations in bone metabolism. The primary objective of this study was to examine the association between PFAS exposure and bone status in a cohort of young men resident in a well-defined area with high PFAS environmental pollution.
Bone status was assessed in 117 subjects aged 18–21 by quantitative ultrasound (QUS) at the heel. Subjects underwent an accurate medical visit. Socio-demographic characteristics, lifestyle, and medical histories were collected. We also verified the interaction between PFAS and hydroxyapatite by computational modelling. The organic anion-transporting peptide (OATP), the putative transporter of PFAS, was evaluated by qPCR in bone biopsies from femoral heads discarded during arthroplasty in three male subjects.
Exposed subjects showed significantly lower stiffness index, which resulted in lower t-score and higher prevalence of subjects at
medium-high risk of fracture
- (23.6%) compared with controls
Data from computational modelling suggested that PFOA exhibits a high affinity for hydroxyapatite, since the estimated change in free energy is in the order of that exhibited by bisphosphonates. Finally, we observed consistent expression of OATP1A2 gene in primary human osteoblasts.
This is the first study reporting increased osteoporosis risk in young men exposed to PFAS and provide preliminary information on molecular mechanisms that could explain this observation, in agreement with previous studies on animal models and humans. However, these results must be interpreted with caution given the cross-sectional study design and the small number of cases.
Clipped from CDC web page - Oct 2019
Some, but not all, studies in humans with PFAS exposure have shown that certain PFAS may:
- affect growth, learning, and behavior of infants and older children
- lower a woman’s chance of getting pregnant
- interfere with the body’s natural hormones
- increase cholesterol levels
- affect the immune system
- increase the risk of cancer
Table of Contents
What are PFAS?
How can I be exposed to PFAS?
What are the health effects?
Understanding PFAS Exposure
Map of ATSDR Site Involvement
Multi-Site Health Study
Pease Study New!
PFAS Exposure Assessments
PFAS Exposure Assessment Technical Tools (PEATT)
Information for Clinicians and Environmental Health Professionals
There have actually been
Note: Iodine has decreased a lot in past 30 years
Less Iodine in bread and milk
Less iodine in salt now:
virtually none in commercially prepared foods
hardly any in salt that has been on the shelf for > 1 year
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