Sunday, 8 a.m.

My wife made yogurt bowls for the whole family. Vanilla yogurt, a big scoop of store granola, and a swirl of honey on top.

It looked like the cover of a health magazine.

So I ate mine and checked my glucose monitor. That's the small sensor I wear on the back of my arm. It reads my blood sugar every few minutes.

That yogurt bowl raised my blood sugar 62 points in under an hour.

For a breakfast I thought of as healthy… that stung.

But here's the thing. The yogurt was never the problem.

The University of Sydney keeps the world's biggest list of how fast foods raise blood sugar. It's called the glycemic index, or GI. Pure glucose scores 100. Anything under 55 counts as low.

In their database, plain yogurts average a GI of 27. Sweetened yogurts average 41. In other words, yogurt on its own is one of the gentlest breakfast foods you can eat.

The trouble is what we pile on top.

Anyway, the timing on this one is good. This spring, researchers in Japan asked 303 adults without diabetes to eat a cup of plain yogurt every morning for 12 weeks. Everyone wore a glucose monitor the whole time.

By the end, their average blood sugar had dropped about 4 points. The ups and downs through the day got smaller, too. The study came out in The Journal of Nutrition.

Four points isn't huge. And the study had no comparison group, so we can't be sure the yogurt did all the work.

Still… it's interesting. And the yogurt they used was plain.

● Before & After

So I ran my own test. On Sunday I ate the vanilla bowl. On Monday I built a new bowl of about the same size, using the steps below.

This is one person's experiment, not medical advice. Everyone's body responds differently.

The new bowl raised my blood sugar 44 points less.

It's revealing.

Here's what surprised me most. The steady bowl kept me full until lunch. After the vanilla bowl, I was digging through the pantry for a snack by ten.

Could the toppings matter that much? On my glucose monitor, they did.

● How to Build It

Why does this work? Plain Greek yogurt has more protein and less sugar than the flavored kind. The Sydney team found that this balance of protein to carbs, more than the sugar alone, explained why plain yogurt scored lower.

Protein and fat slow down how fast your stomach empties. So the sugar from the berries reaches your blood more slowly.

The fiber in berries and chia seeds slows that sugar down even more.

In other words, every topping in the new bowl helps the sugar arrive slowly.

And the granola? Many store granolas are oats baked with sugar and oil. Check the ingredient list, and you'll often find sugar, honey, or syrup near the top. A big scoop adds up fast.

Nuts give you the same crunch. They just don't bring the sugar along.

● Dos & Don'ts

The kids were not impressed at first.

My son took one bite of plain yogurt and called it “sour sadness.” I laughed so hard I nearly spilled my coffee.

So we made a deal. They add their own berries, plus one small drizzle of honey on top. It's their bowl, and I don't police it.

Meanwhile, I've started adding cinnamon to mine.

By the way, there's a fresh study on that, too. It was presented this summer at Nutrition 2026, a big nutrition science meeting. Women who ate yogurt with cinnamon and ginger twice a day for four weeks had more of certain gut bacteria linked to better blood sugar control.

But it was only 25 people. And it looked at gut bacteria, not at what one bowl does to your blood sugar after breakfast.

So I add cinnamon because I like the taste… and if it helps, that's a bonus.

We don't have to give up yogurt bowls. We just have to build them from the bottom up: plain yogurt first, then toppings that slow the sugar down.

I don't know if my numbers will match yours. Everyone's body is a little different. But this is one of the easiest breakfast changes I've made all year.

Tomorrow, a quiz. Greek yogurt, Activia, or fruit yogurt… which one raised my blood sugar the most?

Stay steady