If you watch the news or scroll Facebook, you may have encountered alarming warnings about fluoride. Statements including “it’s a neurotoxin”, “it lowers IQ,” or “it could worsen ADHD symptoms”. With all the noise online, it is understandable to wonder…should people with ADHD avoid fluoridated toothpaste?
Let’s dig into what the science says:
What does fluoride in toothpaste do?
Fluoride in toothpaste is used topically, meaning it helps remineralize enamel and prevent cavities by interacting with the surface of your teeth. It’s not meant to be swallowed. When used as directed, the amount you absorb systemically is extremely small.
Fluoridated toothpaste is one of the most effective tools we have to prevent tooth decay, which is more common in people with ADHD, due to executive function challenges around oral hygiene and diet (e.g., frequent snacking or sugary drinks).
Is fluoride a neurotoxin?
Yes – but context matters. At very high levels, fluoride can cross the blood-brain barrier and potentially impact brain development. Some studies have linked prenatal or early childhood exposure to fluoride with lower IQ scores or increased neurobehavioral symptoms. However, these associations have only shown up at levels far above what you get brushing your teeth.
For adults with ADHD, there is no good evidence that fluoridated toothpaste contributes to symptoms or causes harm. Studies examining fluoride levels in urine or local water supplies haven’t found a meaningful link between fluoride exposure and adult ADHD symptoms.
What about swallowing toothpaste by accident?
If you occasionally swallow a tiny bit of toothpaste, you are likely fine.
For children, especially under age 6, fluoride-free toothpaste can be a good option since they are more likely to swallow it, and developing brains are more vulnerable to environmental exposures.
But for teens and adults, especially those with ADHD who may already be at higher risk for dental issues, fluoridated toothpaste is considered safe and effective. It prevents cavities, which can become expensive and painful if not addressed.
Bottom line
If you’re an adult with ADHD, using fluoridated toothpaste is not only safe, it’s recommended by most dental professionals. The concerns about fluoride and brain health largely center on pregnancy and early childhood, not on adult exposure or topical use like brushing your teeth.
That said, if you simply prefer fluoride-free options, there’s nothing wrong with that! But please make sure your alternative still contains ingredients that effectively fight plaque and cavities. You can always talk with your dentist about your choices.
Some additional areas to focus on to improve your oral health and microbiome include:
- Flossing 3x per day
- Brushing 2-3x per day
- Drinking fluoridated water
- Tongue scraping
- Eliminating sugary drinks, including alcohol
- Reducing added sugars
- Addressing overnight mouth-breathing
Not on ADHD meds – or can’t take them? Let’s start with food.
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P.S. Just like with gut microbiome research, I cut through the noise to bring you what really works – no pseudoscience, just evidence-based nutrition strategies for ADHD.
