The After-Dinner Blood Sugar Spike, Explained | T1D Pre-Bolus Challenge
You counted the carbs. You took the right dose. Two hours later you’re 240, and you have no idea why. If that number breaks your heart a little, this episode is for you. Neil sits in the problem of the post-meal spike, the one that feels...
The episode, word for word
Let's talk about the number that breaks your heart a little.
You made dinner. You counted the carbs like a functional adult who has it together. You took the dose that was, mathematically, correct. You felt good about it. Maybe even a little smug.
Two hours later you look down and you're 240.
And you just stare at it. Because you did everything right. The math was mathing. And the number climbed anyway, like it didn't even read your work.
That number is what we're talking about today. Not how to fix it yet. Just how much it stinks. Because we can't fix something we keep quietly blaming on ourselves.
I'm Neil Greathouse, 34 years with type 1, and this is Your Best T1D Year.
Wednesday we kicked off The Head Start, our eight-week thing on pre-bolusing, and I told you we're going to spend the first stretch on the real reasons we don't do it before we touch a single study. Today's reason is the one that hooks us in the first place. The post-meal spike that feels like a personal failing.
You know it. You ate, you dosed, and an hour later your CGM is climbing a hill that would scare a billy goat. And here's what makes it sting. It doesn't feel like a timing thing. It feels like a you thing. Like if you were just a little more disciplined, a little more on top of it, the number would behave.
I want to push back on that. Gently. That spike, almost every time, is not about how much insulin you took. The dose might have been perfect. It's about when. And we'll prove that later.
But watch the whole loop, because the loop is the real villain. You spike to 240. So you correct. Then a couple hours later that correction catches the tail end of your dinner insulin and you start sliding low. So you eat something. And now you're climbing again. And it's 9pm and you're stacking snacks and insulin in the dark like you're defusing a bomb with oven mitts on. You panic-correct. You crash. You glare at the CGM like it owes you money.
Same loop. Every night. And here's the part I really want you to feel before the weekend. That loop is exhausting, and it costs you way more than a number on a screen. It costs you your evening. Your mood. Your sleep. Your patience with the people you love. It taxes everything.
So when I ask you to look at this with me over the next few weeks, I'm not asking you to chase a perfect graph. I'm asking you to get a few of your evenings back.
Same challenge as Wednesday. We're still just watching. Notice your number two hours after dinner. If you want, peek at your number right before you eat too. Two snapshots. Change nothing. We're building the "before."
Before you fire up the grill this weekend, do one thing for me. Go to yourbestt1dyear.com and opt in to the newsletter so you can actually follow along. There are freebies waiting, and around 1,500 of us are doing this challenge together right now. Come grab your spot.
T1D is relentless. But managing it does not have to be. And getting one of those evenings back, that's where we're headed.
I'm Neil. Go enjoy the holiday weekend, and I'll see you Monday, where we finally say the quiet part out loud. The fear.
This is the script as read on the mic, lightly tidied for reading. Education, not medical advice. Talk to your care team before you change anything about your insulin.