“I am 84. I have never had a filling in my life.”

I am 84 years old. I have never had a filling in my life. In my village, we do not lose our teeth — and I want to tell you why, because I think you have been looking in the wrong place.

I live in Ogimi. A small village on the northern tip of Okinawa. We have more people over one hundred years old here than almost anywhere on earth.

The researchers come. They study our fish. Our sweet potatoes. Our green tea. They write their papers and they leave.

But there is something they always seem to miss.

Look at our teeth.

I am 84. My wife is 81. Between us we have lost not a single tooth. My neighbour Yoshio is 91 — he still eats whole fish. My friend Shiki is 88, and he has never sat in a dentist’s chair for anything more than a cleaning.

This is not unusual here. This is just normal.

The thing nobody asks about

In Japan, for as long as I can remember, our toothpaste has contained a mineral called hydroxyapatite.

It is the same mineral your teeth are made from.

When you brush with it, it works with your enamel — morning and night — supporting the natural repair process your mouth already runs on its own. We did not think of it as special. It was simply what toothpaste contained.

I was surprised, later in life, to learn that in many other countries this mineral was never put into toothpaste at all. That fluoride became the standard instead. A different chemical. A different approach.

I do not know why that decision was made.

I only know what I see here.

Eighty-four years old. All my teeth. All my neighbours’ teeth.

Why enamel needs the mineral it’s made of

Here is the part almost no one is ever told.

Your enamel — the hardest thing your body builds, harder than bone — is roughly 97% hydroxyapatite. Not coated in it. Made of it. It is, quite literally, the material your teeth are carved from.

And it is under quiet attack every day. Every coffee. Every acidic bite. Every colony of bacteria pulls microscopic traces of that mineral back out of the enamel — dentists call it demineralisation. Your saliva spends all day trying to put it back, in a tug-of-war you never feel happening.

Most toothpaste tries to win that war by hardening a wall on the surface. Fair enough. But it raises a question almost no one stops to ask:

What if you simply gave your enamel more of what it is already made of?

That is the whole idea behind hydroxyapatite. Research suggests it can support the enamel’s own remineralisation and help calm the kind of sensitivity that makes cold air or ice cream wince-worthy — with a number of studies putting it shoulder to shoulder with fluoride.

And it is not a new fad. It was developed decades ago off the back of space-program research, and Japan has quietly brushed with it ever since.

So why have most of us never heard of it?

Mostly habit. The long, lazy inertia of habit.

Fluoride became the default across the English-speaking world in the middle of the last century and never loosened its grip. Hydroxyapatite stayed a Japanese open secret — effective, established, and almost entirely unknown to the rest of the world. It is only in the last few years that it has started to cross over.

Which means an old man in an Okinawan village has quietly been decades ahead of the curve. Without ever trying to be.

None of this is a miracle, and I would be the first to wave off anyone who called it one. Good teeth still come down to the dull, dependable basics: brush twice a day, clean between them, go easy on the sugar, see your dentist.

What you brush with is only one piece of that picture. But it is the one piece most people have never once thought to question.

And it is the easiest one to change.