03/04/2026
🦷 LET’S TALK ABOUT FLUORIDE 🦷
We’ve all been told fluoride makes teeth stronger. But when you dig into the research, the story isn’t as simple as we were taught.
Fluoride does not build stronger teeth from the inside. It does not make enamel thicker. What it may do — according to some public health reviews — is slightly reduce cavity rates when applied topically (like in toothpaste). However, several modern systematic reviews note that the benefit is smaller than once believed, especially in countries with good oral hygiene and nutrition.
A 2015 Cochrane review found that much of the early research on water fluoridation was conducted before modern dental practices and had limitations in quality. More recent analyses suggest the cavity-reducing effect is modest and not clearly linked to stronger overall dentition.
Now let’s discuss thyroid health.
Fluoride was historically used in Europe to suppress overactive thyroid function (hyperthyroidism). Because fluoride can inhibit iodine uptake, high exposure has the potential to lower thyroid hormone production.
Pharmacist and thyroid specialist Izabella Wentz has written extensively about environmental triggers that may worsen Hashimoto’s and hypothyroidism, including halogens like fluoride that compete with iodine in the body.
Peer-reviewed research has observed associations between higher fluoride exposure and altered TSH levels, particularly in iodine-deficient populations. Some ecological studies in the UK have reported higher rates of hypothyroidism in fluoridated regions, though causation is still debated.
Meanwhile, physician and researcher Michael Greger emphasizes evaluating total evidence. He notes that while fluoride can affect thyroid function at high doses, most regulatory agencies conclude current water levels in the U.S. are below established safety thresholds. However, he also stresses that cumulative exposure (water, tea, dental products, processed beverages) should not be ignored.
Other documented concerns from peer-reviewed sources include:
• Dental fluorosis (visible enamel changes from overexposure in childhood)
• Potential neurodevelopmental concerns at higher exposure levels
• Thyroid hormone disruption in susceptible individuals
The important point? Fluoride is not a nutrient. It is not required for healthy teeth. Good oral hygiene, adequate minerals, balanced nutrition, and proper dental care matter far more.
If you want to reduce exposure:
• Use reverse osmosis or activated alumina filtration (standard carbon filters do not remove fluoride).
• Choose fluoride-free toothpaste if that aligns with your preference.
• Ensure adequate iodine intake to support thyroid health (under medical guidance).
This isn’t about fear. It’s about informed consent and understanding both sides of the research.
Always review peer-reviewed data, talk with your healthcare provider, and decide what aligns with your health goals.