This week we cover new findings on how flossing may help prevent dementia and the latest safety review of nanohydroxyapatite from the European Scientific Committee on Consumer Safety (SCCS).
Is nanohydroxyapatite BANNED? 🇪🇺
Short answer: no. Nanohydroxyapatite is not banned in the EU.
Confusion likely arose because the SCCS raised safety questions while reviewing the ingredient. Nanomaterials in general attract scrutiny since their tiny size can allow them to reach tissues the body may process differently than larger particles—think of concerns previously voiced about nano zinc in sunscreens.
The SCCS review is thorough; arguably more so than some other regulatory reviews. Their formal opinion on nanohydroxyapatite is scheduled for publication on March 15. Based on the committee’s draft and informal statements, I do not expect dramatic changes: the SCCS has indicated that rod-shaped nanohydroxyapatite at concentrations below 10% is considered safe.
However, the SCCS has warned that needle-shaped nanohydroxyapatite raises safety concerns. For clarity: the hydroxyapatite toothpastes I recommend do not contain needle-shaped particles.
Hydroxyapatite is the primary mineral in tooth enamel and dentin—essentially a form of calcium phosphate. Processed into nanoscale particles, it can better penetrate dentin tubules and help reduce sensitivity. When swallowed, hydroxyapatite particles dissolve in the acidic environment of the stomach and do not present a safety concern, according to published studies.
I welcome public conversation about toothpaste ingredients and will follow the SCCS announcement closely. I plan to summarize and interpret the committee’s final opinion in an upcoming newsletter so readers can make informed choices.
Flossing to lower dementia risk — a stronger message
Forget the old slogan “floss the teeth you want to keep.” While that’s true, it’s not a powerful motivator for many people. Emerging evidence linking oral inflammation and gum disease to cognitive decline makes a more compelling case: regular flossing may play a role in reducing Alzheimer’s risk by limiting chronic oral infection and inflammation.
If you’re looking to make flossing a reliable habit or want to improve technique, here are some practical resources I’ve published that cover behavior, method, and safety:
1. How to make it a habit: The psychology of flossing
2. How to floss the right way: a video demonstration of proper technique
3. How bad is not flossing? — the impacts of skipping flossing
4. Is your floss toxic? — what to look for in floss materials
Making flossing part of your daily routine can protect oral health and may also contribute to long-term brain health. That potential connection is, in my view, the most persuasive reason to commit to flossing every day.
That’s all for now. Happy Monday — I hope you have a great week.
P.S. I personally use nanohydroxyapatite toothpaste daily for sensitivity. It works well for me.