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  • Which Q1 Food Spiked the Hardest?

Pop quiz.

Thirteen weeks ago, I strapped on a glucose monitor and started testing breakfast foods, one at a time.

Three of those foods turned out to be the highest-GI things we tested all quarter: mashed potato, instant oatmeal with honey, and plain white rice.

One of them raised my blood sugar more than anything else we've tested so far.

Guess which one before you keep reading…

In diapers at 37 — and Kegels were not what fixed it

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In diapers at 37 — and Kegels were not what fixed it

● The Contenders

🥕
Mashed Potato
⚡ Spike: +92 mg/dL
🍳
Instant Oatmeal with Honey
Spike: +78 mg/dL
🍚
Plain White Rice
Spike: +65 mg/dL

Mashed potato won. It wasn't close.

In other words, the food we treat as basic comfort food beat an entire bowl of oatmeal and a full plate of rice.

Here's why. Mashing breaks the potato's cell walls completely apart. That releases the starch so fast your body absorbs it almost like sugar water. A whole boiled or baked potato keeps more of its structure. Mashing destroys it.

So the texture matters almost as much as the food itself.

The glycemic index backs this up. The University of Sydney's database puts mashed potato in the high 70s to mid-80s. Instant oatmeal runs around 79. White rice sits closer to 70. All three count as high-GI, but mashed potato beats even them.

And there's a timely reason to care about this. A study published this August in the journal Diabetes, Obesity and Metabolism followed real people wearing glucose monitors through ordinary days. Meal timing and small dietary choices predicted a spike better than anything else the researchers measured, including genetics. The research here is still young. But it lines up with everything we tested this quarter: it's not only what's on the plate, it's how it's cooked and when you eat it.

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

MASHED POTATO: MY BLOOD SUGAR RESPONSE
Peak glucose spike
+92
   
mg/dL above fasting
Start
91
mg/dL · 0 min
Peak ⚡
+92
mg/dL · 45 min
Crash ↓
68
mg/dL · 110 min
Source: Continuous glucose monitor (Libre 3)

It's revealing.

● The Scoreboard

Here's how all three stacked up.

🥕 Mashed Potato
+92
   
🍳 Instant Oatmeal with Honey
+78
   
🍚 Plain White Rice
+65
   

By the way, you don't have to give up mashed potatoes.

Leave some texture instead of whipping them smooth. Add the skin back in. Top with butter, olive oil, or a spoonful of Greek yogurt for fat and protein. That combination alone blunts a real part of the spike.

Tomorrow, we swap out one of this quarter's biggest offenders for something steadier…

Stay steady

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