A Focus Is Now not a Dose
Fluoride Sequence Article Two
I don’t make stronger the usage of fluoride in ingesting water, dietary supplements, or dental merchandise. Fluoride is a poisonous substance with documented destructive results at enough publicity, together with dental and skeletal fluorosis. My worry is the fitness of the entire particular person, and I desire a fluoride-free strategy to dental care. Pronouncing {that a} water provide incorporates a beneficial focus does now not let us know how a lot a person swallows, keeps, or receives from different resources. That’s the factor on the middle of this text. [1,2] Public-health coverage will have to give protection to the ones maximum prone to an publicity, somewhat than depend on a mean that may difficult to understand their instances.
Why I modified my place on fluoride
For the primary 36 years of my dental hygiene profession, I assumed in fluoride. I relied on the American Dental Affiliation and the American Dental Hygienists’ Affiliation to have my sufferers’ absolute best pursuits at middle. I approved the assurances about protection and hollow space prevention and repeated them to sufferers. I used to be desirous about tooth. I had now not tested the publicity query in moderation sufficient or regarded as what swallowed fluoride would possibly imply for the remainder of the frame.
Once I started studying past the standard dental suggestions, my place modified. I checked out analysis on fluoride publicity, fluorosis, and early life neurodevelopment, in addition to the proof for water fluoridation’s receive advantages. I may not deal with a advice from a company as the tip of the dialog. In my 2023 article, “Fluoride the Destroyer—See the Darkish Facet,” I described that vary in standpoint. I stay hostile to intentionally including fluoride to water or the usage of it in dental care. [3]
Fluoridation advocates continuously resolution considerations via pronouncing, “The dose makes the poison.” Dose does subject. However that theory calls for us to inspect the dose if truth be told gained. The ceaselessly repeated determine of 0.7 milligrams in line with liter is a water focus, now not an individualized dose. At that focus, ingesting one liter provides 0.7 milligrams of fluoride from the water; ingesting 3 liters provides 2.1 milligrams. The water is similar, however the quantity swallowed is thrice larger.
The calculation will have to additionally account for frame weight, fluoride from different resources, and publicity through the years. The volume swallowed isn’t essentially the volume retained, as a result of absorption and removal subject too. Those variations don’t identify that each and every particular person ingesting fluoridated water is injured. They identify why mentioning a focus can’t resolution each and every query about an individual’s publicity. I don’t regard “the dose makes the poison” as a justification for including fluoride to everybody’s ingesting water. [1,2]
Tea can give a contribution fluoride as a result of tea crops collect it, with the volume in a cup various via leaves, brewing, and intake. Swallowed toothpaste, different dental merchandise, and fluoride dietary supplements can give a contribution further publicity. A significant overview considers those resources in combination, somewhat than treating the tap-water focus as the entire tale. [1,2]
Some fluorine-containing medicines liberate inorganic fluoride all the way through metabolism and will give a contribution to general publicity. Voriconazole is a documented instance: its prescribing knowledge warns about fluorosis and periostitis, irritation round bone, all the way through long-term remedy. On the other hand, chemically certain fluorine on my own does now not identify how a lot fluoride a drugs releases. Publicity will have to be assessed drug via drug, bearing in mind dose, remedy period, and kidney serve as. [4,5]
A pharmacist can lend a hand decide whether or not a selected medicine is a documented supply of fluoride publicity, even supposing dependable measurements aren’t to be had for each and every drug. Sufferers can ask: “Does this medicine liberate inorganic fluoride all the way through metabolism, and is the volume clinically important at my dose and remedy period, particularly given my kidney serve as?” A drugs evaluation will have to tell choices with the prescribing clinician.
Individuals who drink strangely huge quantities of water would possibly ingest extra fluoride from that water. The Nationwide Analysis Council regarded as high-consumption teams, together with outside employees, athletes, and folks with prerequisites related to over the top thirst. The kidneys are a big course of fluoride removal, so impaired renal serve as too can impact retention. A uniform water focus does now not regulate for both circumstance. The NRC file tested EPA’s drinking-water requirements and didn’t identify that 0.7 mg/L reasons kidney illness. Its publicity research nonetheless issues after we ask who receives extra fluoride and who clears it much less successfully. [1,2]
Dental fluorosis effects from over the top fluoride ingestion whilst tooth is growing. Its look can vary from refined adjustments to extra critical pitting and injury. Dental fluorosis is visual proof that over the top systemic fluoride publicity affected the growing teeth. The exchange we see at the floor started whilst tooth used to be forming throughout the frame. I don’t disregard a affected person’s worry about it as simply beauty. It merits consideration as an publicity marker, even supposing dental fluorosis on my own can’t let us know whether or not the mind, kidneys, bones, or different organs have been harmed. It displays publicity all the way through early life teeth construction somewhat than essentially indicating somebody’s present fluoride consumption. [1]
Lengthy-term, sufficiently excessive publicity too can purpose skeletal fluorosis. Bone and joint ache, stiffness, and different musculoskeletal adjustments would possibly require an in depth publicity historical past when a clinician suspects it. Skeletal fluorosis is rare in the US, and an aching joint isn’t proof of fluoride toxicity. My worry is that considerable publicity is also overpassed when clinicians by no means ask about water consumption, tea intake, kidney serve as, or different fluoride resources. [1,2]
My objection is {that a} unmarried water focus can’t account for the folk maximum prone to greater consumption, decreased clearance, or publicity all the way through construction. Folks with kidney illness, folks whose diabetes reasons over the top thirst, babies, and growing fetuses deserve specific attention. A median publicity estimate can difficult to understand the instances of those that obtain extra fluoride or do away with it much less successfully. A coverage will have to provide an explanation for the way it protects the ones teams, now not merely cite a goal focus. [1,2]
Diminished kidney serve as can impair fluoride removal and build up retention. Diabetes gifts a distinct publicity worry: when poorly managed blood glucose reasons over the top thirst, larger water intake method larger fluoride consumption on the similar focus. Diabetes too can coexist with kidney illness. Those mechanisms will have to now not be handled as interchangeable, and a diabetes prognosis on my own does now not identify fluoride toxicity. The stage of renal impairment and an individual’s exact consumption subject. [1,2]
Dialysis calls for an extra difference. Water used to arrange hemodialysis fluid will have to go through particular remedy and conform to strict contaminant controls, together with controls for fluoride. That is other from a common instruction that dialysis sufferers will have to keep away from ingesting fluoridated water. The Nationwide Kidney Basis has now not issued particular tips about fluoride consumption in kidney illness for the reason that analysis is restricted. Kidney Well being Australia’s 2018 observation advises tracking fluoride consumption and keeping off fluoride-rich components in degree 4 or 5 kidney illness, whilst supporting group fluoridation at beneficial ranges. Particular person recommendation about ingesting water and general fluid consumption belongs with the affected person’s nephrologist. [6,7,8]
For formula-fed babies, blending water can give a contribution again and again to consumption relative to an excessively small frame weight. All through being pregnant, the fear contains publicity all the way through fetal mind construction, which is the focal point of the prenatal research mentioned beneath. The proof differs throughout those teams; it does now not identify that each and every particular person in them will increase toxicity from water at 0.7 mg/L. Higher consumption or retention isn’t the similar as a demonstrated damage, and developmental research depart essential questions unresolved. The ones distinctions lend a hand us establish what wishes coverage and dimension. [1,2,9,10]
Repeated consumption and retention through the years additionally subject. Some absorbed fluoride is eradicated, mainly throughout the kidneys, whilst some is retained, particularly in bone. Persevered publicity can give a contribution to accumulation, and impaired clearance can build up that burden. Lengthy-term, sufficiently excessive publicity may cause skeletal fluorosis. Because of this a unmarried day’s consumption or a unmarried water dimension can’t describe an entire life of publicity. Accumulation isn’t the one worry, then again: an overfeed can lift momentary consumption, and publicity all the way through construction raises questions on timing in addition to quantity. The related questions are how a lot enters the frame, how a lot leaves, what’s retained, and when publicity happens. [1,2]
My place is that those variations support the case towards deliberately including fluoride to a shared water provide. I don’t settle for a inhabitants moderate as enough reassurance for an individual with impaired clearance or a kid uncovered all the way through construction. The people who find themselves least in a position to keep watch over their publicity will have to be central to the verdict. For me, protective them method opting for fluoride-free water and individualized prevention that addresses the reasons of dental illness.
An toddler’s small frame mass makes consumption in line with kilogram particularly related. Components ready with fluoridated water may give a repeated course of publicity when that system provides maximum or all vitamin and fluid. Breast milk normally incorporates much less fluoride, even supposing its focus isn’t at all times 0. Those are distinct publicity eventualities, and a inhabitants moderate can’t describe each and every toddler. [1]
The similar fluoride focus can ship a far greater consumption relative to an toddler’s frame weight. Imagine an illustrative comparability the usage of water containing 0.7 mg/L fluoride: a 5-kilogram toddler receiving system ready with 0.75 liter of blending water in an afternoon would obtain 0.525 milligrams of fluoride from that water, or 0.105 mg/kg. A 70-kilogram grownup ingesting two liters would obtain 1.4 milligrams, or 0.020 mg/kg. On this instance, the baby receives much less fluoride in general however roughly 5 instances as a lot in line with kilogram of frame weight. [11]
Those assumptions illustrate the calculation; they don’t seem to be a feeding advice. The comparability counts simplest the water and excludes fluoride in system elements and different resources within the grownup’s nutrition. It does now not identify damage. “An grownup dose” is due to this fact too imprecise an outline. The worry is repeated consumption relative to a small frame mass all the way through construction. CDC recognizes an greater probability of delicate dental fluorosis when an toddler consumes simplest system combined with fluoridated water. [12]
A 2026 evaluation via Soleimani and associates blended 9 research reporting fluoride measurements in 1,394 breast-milk samples. The authors discovered variation and used modeling to flag some publicity situations for nearer consideration. They didn’t measure hurt in babies or identify that group fluoridation led to the fluoride detected in milk. I come with the evaluation as a result of toddler publicity merits cautious dimension, now not as it establishes that breastfeeding is unsafe. [13]
My opposition additionally displays worry about prenatal publicity and the growing mind. Pregnant girls and babies can’t be handled as smaller variations of a wholesome moderate grownup. Even a considerable dental receive advantages would now not convince me to simply accept an avoidable chance to mind construction. That’s the worth judgment guiding my place; the research themselves will have to nonetheless be described appropriately.
The Nationwide Toxicology Program’s 2024 evaluation concluded, with reasonable self belief, that upper fluoride publicity, reminiscent of ingesting water above 1.5 mg/L, is related to decrease IQ in kids. It additionally said that the information have been inadequate to decide whether or not water at 0.7 mg/L impacts kids’s IQ. That limitation does now not identify protection at 0.7 mg/L, and it does now not turn out hurt at that particular focus. For me, unresolved developmental considerations are a explanation why to keep away from deliberately including fluoride whilst higher proof is sought. [9]
Dr. Philippe Grandjean and associates analyzed maternal urinary fluoride and kid IQ in potential delivery cohorts. Their 2022 research of Canadian and Mexican information estimated decrease self belief bounds close to 0.2 mg/L in maternal urine for a modeled one-point IQ distinction. A later research including a Danish cohort reported a pooled decrease certain of 0.28 mg/L in maternal urine. The Danish cohort on my own didn’t display a statistically important affiliation with full-scale IQ. Those values are statistical benchmarks, now not promises of a person kid’s consequence or direct drinking-water limits. [14,15]
The Canadian cohort underlying the research incorporated moms in fluoridated communities with an average water focus of 0.59 mg/L. Upper maternal urinary fluoride used to be related to decrease IQ in boys; that urine affiliation used to be now not statistically important in women. Urinary fluoride displays publicity from more than one resources and can’t merely be equated with the similar quantity in ingesting water. Those findings are related to peculiar publicity instances, however they don’t turn out that precisely 0.7 mg/L in water reasons a specified IQ loss. The worry is general prenatal publicity, which a goal water focus can’t totally describe. [10]
Why I make a choice fluoride-free care
My worry starts with the individual receiving the publicity. Water focus on my own can’t describe consumption, kidney clearance, retention through the years, or publicity all the way through construction. The ones variations deserve consideration in scientific care and public coverage. [1,2]
I oppose including fluoride to ingesting water and don’t make stronger fluoride dietary supplements or topical merchandise. Its documented toxicity and the unresolved questions on developmental publicity lead me to make a choice fluoride-free care and individualized prevention. Protective susceptible folks will have to be central to that call. Prior to repeating {that a} beneficial focus is secure, we will have to ask: secure for whom, at what general consumption, and over what time period? A focus isn’t a dose, and a mean can’t stand in for the affected person.
As a career, we’ve got a duty to give protection to all of the particular person. For my part, our strategy to fluoride has been shortsighted: we’ve got centered too narrowly on tooth whilst giving inadequate consideration to general publicity, kidney serve as, developmental vulnerability, and the questions raised via present analysis. I come with myself in that complaint. For many years, I repeated what I have been taught with out analyzing it intently sufficient. Our duty is to stay studying, query our assumptions, provide an explanation for uncertainty in truth, and rethink our suggestions when the proof warrants it. Protective tooth will have to be a part of protective the one who carries them.
In Article 3, “Fluoride in Your Water: What Else Comes With It?”, I read about fluoridation components, conceivable contaminants, and remedy overfeeds—together with the consequences for toddler system, fridge water, and ice—and provide an explanation for why transparency and knowledgeable consent subject.
Thanks for studying to the tip, for staying curious, and for worrying in regards to the fitness and well-being of the individuals who believe us with their care. I know the way difficult it may be to rethink one thing we’ve got believed and taught for years. I’ve walked that trail myself, and I’m nonetheless studying.
My hope is that you’re going to stay studying, ask considerate questions, and make room for conversations that problem acquainted assumptions. We percentage a need to lend a hand our sufferers thrive. Let that care information us as we continue to learn how to give protection to the entire particular person.
Warmly,
Barbara Tritz
The Queen of Dental Hygiene, fierce protector of the frame and suggest for complete frame therapeutic
1. Company for Poisonous Components and Illness Registry. Toxicological Profile for Fluorides Hydrogen Fluoride and Fluorine. 2003. Supply
2. Nationwide Analysis Council. Fluoride in Ingesting Water A Clinical Overview of EPA’s Requirements. Nationwide Academies Press; 2006. doi:10.17226/11571. Supply
3. Tritz BK. Fluoride the Destroyer See the Darkish Facet. Queen of Dental Hygiene. February 2023. Supply
4. VFEND (voriconazole). Prescribing knowledge. Segment 5.12 Skeletal Antagonistic Reactions. Supply
5. Wermers RA, et al. Fluoride extra and periostitis in transplant sufferers receiving long-term voriconazole remedy. Clin Infect Dis. 2011;52(5):604–611. Supply
6. Facilities for Illness Keep watch over and Prevention. Water Use in Dialysis. March 26, 2024. Supply
7. Nationwide Kidney Basis. Fluoride. Accessed October 1, 2026. Supply
8. Kidney Well being Australia. Fluoride Place Commentary 2018 Overview. April 2018. Supply
9. Nationwide Toxicology Program. Fluoride Publicity Neurodevelopment and Cognition. 2024 monograph and overview abstract. Supply
10. Inexperienced R, et al. Affiliation between maternal fluoride publicity all the way through being pregnant and IQ ratings in offspring in Canada. JAMA Pediatr. 2019;173(10):940–948. Supply
11. Institute of Medication. Nutritional Reference Intakes for Calcium Phosphorus Magnesium Diet D and Fluoride. Nationwide Academies Press; 1997. Bankruptcy 8 Fluoride. Supply
12. Facilities for Illness Keep watch over and Prevention. Group Water Fluoridation Ceaselessly Requested Questions. Toddler system steering. Supply
13. Soleimani H, et al. Prevalence of fluoride in breast milk a world systematic literature evaluation and human fitness chance overview via Monte Carlo simulation. Int J Environ Well being Res. 2026;36(8):2102–2116. doi:10.1080/09603123.2026.2616406. Supply
14. Grandjean P, et al. A benchmark dose research for maternal being pregnant urine-fluoride and IQ in kids. Possibility Anal. 2022;42(3):439–449. doi:10.1111/risa.13767. Supply
15. Grandjean P, et al. Dose dependence of prenatal fluoride publicity associations with cognitive efficiency in class age in 3 potential research. Eur J Public Well being. 2024;34(1):143–149. doi:10.1093/eurpub/ckad170. Supply
