Day One: Starting My Tirzepatide Journey
Today is day one of tirzepatide. I took my first 2.5 mg shot this morning and wanted to write down what happened while it's fresh.
The First Shot
I'm not great with needles. Never have been. So I went into this morning braced for it to be worse than it was. The needle is tiny. Way smaller than I'd built up in my head. There was a little pinch at the injection site and that was it.
What I didn't expect was the rush of energy right after. Almost certainly psychological, adrenaline from getting through the needle thing plus the satisfaction of finally doing the thing I said I was going to do. Either way, it set the tone for the day.
The Immediate Effects
The thing that hit me first was satiety. Real satiety. I ate, I felt done, and I stayed done. Not stuffed, not uncomfortable, just finished. Given my history with insulin resistance and the way my hunger signals have basically been lying to me for years, this is a big deal.
The bigger shift was the food noise going quiet. If you haven't dealt with food noise, it's the background process that's always running. What's next, what's in the fridge, what would taste good right now, even ten minutes after a meal. It eats compute. I didn't realize how much until it stopped. It's not gone, but it dropped from a roar to a whisper, and the mental bandwidth that frees up is significant on its own.
Protein Goals and Progress
A core goal here is preserving and ideally building lean mass while the fat comes off. I'm targeting 200+ grams of protein per day. Today I hit it without it feeling like a chore. In the past, hitting that number was basically a part time job. Today I just ate normally and got there. The fact that I cleared my protein target while feeling fully satisfied tells me 2.5 mg might be plenty for me, at least at the start.
Baseline Metrics
- Current weight: 315 lbs
- Lean body mass: 200 lbs (recent DEXA)
- Starting dose: 2.5 mg tirzepatide
- Primary goal: fat loss with lean mass preserved
What I'm Most Excited About
The weight loss is the obvious win. The thing I actually care about is reversing the insulin resistance. My body has been bad at handling glucose for a long time, and that's downstream of a lot of other problems. If this restores my insulin sensitivity, the benefits go way past the scale. Better energy, better cognition, less inflammation, lower long term disease risk. That's the real prize.
Looking Ahead
Based on the pharmacokinetics, the effects should ramp through the week as the drug builds up, peak around mid week, then taper as I get close to day seven and the next shot.
I have a follow up DEXA scheduled at 30 days. That'll give me real numbers on fat loss versus lean mass retention, which is the only measure that actually matters here. I'll review the results with my physician and decide whether to adjust the dose or hold.
Final Thoughts
Day one beat my expectations. Quiet food noise, real satiety, easy protein. If this is the floor, I'm in good shape. One day isn't a trend and I know there's harder stuff coming, but today was a good first data point.
More to come as this plays out. I'll keep documenting the wins, the rough spots, and what I learn along the way.