Anyone else tracking fasting glucose on semaglutide? Odd 12-week pattern

The week 11–14 bounce shows up all over the tracking logs people post. Fasting numbers go 98, then 103, then back to 96 — and nothing changed in between. Common surprise, honestly: the graph looks like it's breaking and then it just isn't. From what's out there, it tends to settle around week 18.

Resting HR +6 is the part that caught my eye. My own tracking went +8 bpm the first month, then down to +3 by week 10. Did yours climb after a protocol change?

My A1c went 5.7 to 5.5 at week 12, fasting stayed around 100. Weight was the bigger mover, down 11 kg. Maybe glucose lags the scale.

That fasting bounce sounds like dawn phenomenon plus lower food volume? Not a doctor, just what my CGM showed.

CGM is key. My fingersticks missed a 3am dip then a 6am rise. Average looked fine but fasting looked erratic.

I'm in a similar spot: week 16, A1c 5.5, fasting mostly 95-102. What helped me see the pattern was logging sleep and late meals. If I eat within two hours of bed, my 6am number is 5-8 mg/dL higher. A walk after dinner drops it. Not saying that's your cause, but the variance looked random until I added those columns. The enrollment numbers are interesting-NCT06897475 at 200 is much bigger than NCT07401992 at 62. I wonder if recruitment speed changes who reports.

Wait, are those all semaglutide trials? The names look like a mixed batch. If so, comparing enrollment is apples/oranges.

I asked my endo about the HR bump. She said hydration and lean mass loss can matter, but didn't dismiss it. Mine normalized around week 20.

Not necessarily-starting weight matters. I lost 4 kg by week 14, but my fasting improved more than the scale suggested.

The A1c drop from 5.6 to 5.4 is small but real. My lab has a 0.2 margin, so I'm repeating at week 16 befor eoverreading.

CGM changed everything for me too. I stopped trusting single morning sticks. The overnight line showed a dip and a rebound I never would've guessed. Now I log bedtime snack timing and wake time. Still noisy, but less mysterious.

Late meals are my hidden variable. If dinner lands after 8, my 6am number runs 5-7 points higher. I added a 'last bite' column. Boring, but it explains half the swings I blamed on everything else.

Those trial numbers are apples/oranges for sure. Different sites, different criteria, different recruiting. I peeked at one and noped out. My own spreadsheet is already too much.

Thought they were all the same drug until I read closer. Now I just keep my own weekly log. Week 14 of tracking, fasting 93-104, sleep 5-7 hrs. The pattern's messy but it's mine.

Hydration is weirdly underrated. I started front-loading water before noon. My morning readings got less jumpy, though I also changed dinner. So who knows. Endo said lean mass too, which I'm watching.

Starting weight definitely matters. I lost 4 kg by week 12 but my waist moved more than the scale. Fasting improved in fits, not a straight line. The scale is a bad narrator.

That 0.2 margin thing is why I repeat labs. A single drop can be real, noise, or a bad night. I'm doing week 16 draw and comparing to my home log. Less drama that way.

Mine did the same little bounce aroud week 12, 94 to 100 and back. Bodies aren't linear, annoying as that is.

Sleep was my hidden variable. I chased my fasting number for a month before realizing my 5.5 hours on weeknights were doing more than my food was. Lights out at 10:30 and my morning readings dropped 4-5 points in about 10 days. The resting HR bump you mentioned also settled once sleep got consistent, which surprised me more than the glucose did.

Check your weekends. Mine were the giveaway — Friday takeout pushed my Monday fating up 6-8 points even when weekday numbers looked great, and it settled by Wednesday. A1c 5.6 to 5.4 over 12 weeks is real progress even if the daily number looks flat; that daily one is just a snapshot, and the noisiest one you've got.

On the NCT numbers, enrollment size mostly tells you how many sites are recruiting, not what results will look like, so I wouldn't read a pattern into 62 vs 200. What actually moved my numbers was a 20-minute walk after dinner, four nights a week. Waist down 2 inches before the scale budged much.

My fasting number bounced too, but only on mornings after a late dinner. Try shifting dinner 90 min earlier?

Mine tracked with hydration. 16 oz before bed dropped fasting 4-6 points, no clue why.

I stopped trusting single fasting readings after my meter disagreed with the lab by 8 mg/dL. Same drop of blood, same morning, lab said 93 and my cheap meter said 101. That explained weeks 11-14 bouncing 95-101 way better than any plateau theory. Now I log time of last bite, bathroom wake-up, and whether I walked the night before; my actual fasting trend is smoother when I test 8-10 hours after dinner, not 12+. The weird part: my resting HR also jumped 6 bpm around week 10, then settled when I added a 20-minute evening walk and more water. Weight kept dropping 0.4 kg/week, so I stopped panicking over a 5-point glucose wiggle. A1c is the slower truth, and yours went down. If you want a useful experiment, compare lab fasting glucose to your meter on the same morning.

are you testing immediately on waking, or after you’ve already been upright/moving? Dorm life taught me my “fasting” number can drift 8-ish points if I wait until after shower + walk to the dining hall. I keep the meter on my bunk now and log before my feet hit the floor. My HR was also up ~5 bpm during exam weeks, and my fasting tracked sleep/stress more than anything. N=1 and my body is a drama major. Also, 20 vs 62 enrolled—are those trials even measuring the same fasting endpoint? Small n makes any bounce look weird.

Not a clinician, but I'd separate the fasting plateau from the HR bump. Mine tracked way more with sleep than dinner—nights under 6h or with wakeups, fasting was +5–8 and HR +4–5; a boring consistent-sleep week flattened it. In the trials, resting HR changes are usually small averages, so an individual +6 isn't necessarily the drug alone. On the NCTs: n=62 vs 20 is less informative than primary endpoint, phase, and whether fasting glucose is even the outcome. Do those listings say mechanistic/CGM vs A1c? That'd explain why one is tiny.

I saw a similar week 8 dip then 95-101 wobble, and for me it tracked way more with sleep/resting HR than food timing. When my RHR was up 5-7 bpm, my fasting median ran 4-6 mg/dL higher; after 5-6 nights of consistent sleep it dropped back. I now log weekly median instead of daily, plus a rough dawn-phenomenon check (wake vs 30 min later). On the trials: 62 vs 20 is a big enrollment gap, so I’d check whether one is a pilot/substudy or just different sites. Are you comparing baseline A1c/weight or only glucose? That might explain the pattern more than the med itself.

My fasting numbers flattened around weeks 10–13 too, then resumed drifting down. Switching to a 7-day average instead of staring at each morning made the pattern clearer—daily readings were mostly noise for me. Mine seemed to track sleep and stress more than food: two nights under 6 hours and I’d see a 6–8 point bump. My resting HR also ran higher on days I took my walk after 7 p.m. Are you tracking sleep or walk timing alongside? And on the trials, 20 vs 62 is just enrollment—endpoints and duration matter more than raw size, I think.

I’m a daily weigher/logger too. My fasting glucose did the same arc: nice drop early, then a noisy plateau while A1c and waist kept improving. I only trust a 14-day median now, tagged with sleep, alcohol, and hard workouts. My RHR also bumped ~5 bpm during a poor-sleep/high-cardio stretch, then settled whn I deloaded—did yours line up with sleep or training? On the trials: are those actual enrolled or targets? 20 vs 62 usually isn’t apples-to-apples; check phase and primary endpoint before reading anything into it.

Fasting glucose is a noisy output with at least five inputs. I’d log a 7-day median, not daily, next to sleep, RHR, and weekly loss rate. My only 90→98 drift happened when deficit got aggressive and sleep fell under 6.5h; RHR rose ~5. The med was constant, the stress bucket wasn’t. What changed weeks 11–14: sleep, training volume, alcohol, or rate of loss? Also n=20 vs 62 isn’t a useful trial comparison—just different power and recruitment stage.

I travel most weeks, and my fasting glucose is basically a sleep/time-zone log. Same dinner, same-ish routine, but if I’m up at 4 for a 6am flight or cross two zones, I’ll see 95–100; after a proper hotel sleep it drops back to low 90s. I track it next to bedtime, travel days, and resting HR—my little “plateaus” almost always line up with 3+ short-sleep nights. Did your weeks 11–14 happen to be heavier travel or worse sleep? Also, those two trial NCTs have pretty different n; are you comparing recruitment or endpoints?

That resting HR bump would make me curious too. Mine went up ~5 bpm during a stretch when sleep was fragmented and allergies were bad, and my fasting numbers did a similar wobble even though weight loss was steady. I started noting sleep score, wake time, alcohol, and tough workouts the day before, and the “plateau” made more sense as a stress/sleep cluster than a straight med

One thing I’d check before calling it a plateau: CGM vs lab-draw timing. My CGM shows a dawn rise—mid-80s around

I’d split “waking” from “fasting” glucose before calling it a plateau. My CGM trendline showed a 6:15 fingerstick of 94–97, but by 7:15 I was 103–106 — dawn effect, not the med. Overnight nadir kept drifting down even when mornings looked stuck for ~3 weeks. The +6 bpm RHR jumped out; mine tracked with worse sleep efficiency and late evening meals. Do you have CGM data through weeks 11–14, or just morning fingersticks? Curious whether your overnight low is still improving while the morning number stalls.

Honestly, I’m at week 15 and the only thing that reliably moved my fasting numbers was last bite timing. If I eat after 8pm, next AM runs 5-8 points higher; earlier diner and a short walk after, and it’s back in range. My RHR also jumped ~4 bpm during a bigger deficit, then settled when I stopped fasted morning workouts and ate breakfast. Are you using fingersticks or CGM? The wobble only showed on my CGM; fingersticks looked flat. And those trial sizes—20 feels too tiny to call any glucose pattern.

RHR +6 with fasting glucose drifting 95–101 at weeks 11–14 reads more like cumulative sympathetic/under-recovery than a glycemic plateau. I had the same when I stacked lifting and zone 2 in a deficit: fasting glucose rose ~5–7 mg/dL, RHR +4–6, and both settled after a deload week plus more carbs around training. Worth checking sleep debt, weekly volume, and whether your draw follows a late/hard session. What did your training load and sleep look like during that window?

Small-town pharmacy/insurance angle: my plan won’t cover fancy tracking, so I do finger sticks and a paper log. What jumped out in mine was resting HR and morning glucose both creeping up during heavy training weeks. I added a true deload and a pinch of salt in my water (summer, lots of sweating), and my RHR came down 4–5 bpm over 10 days; fasting numbers followed a bit. Not saying that’s your deal, but did your HR bump start when you upped training volume or skimped on sleep? That combo always shows up in my log before anything else.

I had a similar weird week 10–14 thing. My fasting glucose stayed low until I bumped training volume, then it drifted back to high 90s on mornings after evening lifting or a crappy sleep. Resting HR was up too, which for me was under-recovery + more caffeine. I started noting sleep score, last meal time, and whether I trained after 6pm in the same app, and the pattern got obvious: late sessions = higher AM number. Did your RHR jump track more with your training block than with the scale? Also curious if you’re eating later now than at week 8.

Do you log sleep and evening meal timing? My fasting drift was almost always dinner after 8:30 or under 6.5h sleep, not the med itself. I also keep a column for last bite time and a

I’m a finger-stick tracker too, and the timing thing bit me. If I check after coffee, shower, or chasing the dog, my fasting is 6–8 points higher than right at wake-up. Weeks 10–14 mine drifted 96–101 too, and it lined up with crummy sleep and a random allergy flare, not food. RHR was up a few beats then as well. Did anything like travel, late dinners, wine, or seasonal allergies hit around week 11? Also, are you testing immediately on waking? That made my “pattern” look

When I was in a deficit and lifting more, my fasting numbers got noisy around weeks 10–14 too. For me it tracked with short sleep and evening workouts way more than anything else. My RHR also crept up during that stretch, especially after intervals or when I was under-eating. Are you training later in the day or sleeping worse lately? I started logging sleep, last meal time, and lifting vs rest day next to my glucose, and the 95–101 mornings lined up with crappy sleep + evening sessions. The context column helped me stop spiraling over single numbers.

Cafe owner here—my fasting glucose is so sensitive to sleep and late kitchen pickings. If I close, taste-test, and eat after 8, then open at 5, my morning number runs like 5–8 mg/dL higher than on a day off with the same dinner. Are your draws at the same time, same sleep, same caffeine load? My RHR also creeps whn I’m short on sleep or in a busy stretch. If it’s just this window, maybe it’s more life noise than food; if it keeps drifting, I’d bring it to your doc. The 9 kg and A1c drop seem like the real win.