Week 36 stall, but fasting glucose barely moved?

2026-08-23 7329 views 38 posts

Week 36 of the tracking log. Down 19 lb, waist down 3 inches, but fasting glucose only went from 104 to 101 and A1c from 5.9 to 5.8.

Food noise reads way lower in my notes, so appetite doesn't look like what's driving the plateau. Keep staring at that 72-week trial with 2,539 participants and the 5/10/15 mg arms, wondering when the weight and glucose curves usually decouple.

Anyone else tracking fasting glucose separately from scale weight? Mine lags by weeks. Not looking for dosing advice, just pattern-spotting.

Yeah, same pattern in my logs.

Fasting glucose sat in the low 100s for a long stretch — week 30 came and went with basically no movement, and it hung out there until around week 42ish. Meanwhile the scale kept creeping down the whole time. Then glucose finally dropped a few points over about a month. Bodies are weird about which numbers move first.

That lag makes sense because A1c reflects months of glucose. Your 5.9 to 5.8 at week 36 may just be catching earlier weight loss.

Sleep matters too. My fasting glucose is trash if I get under six hours.

Same. Sleep and stress move mine more than the scale.

The 2539-person trial was in obesity or overweight and ran 72 weeks, so fasting glucose wasn't the main endpoint. Weight was. Maybe that's why your glucose curve looks boring.

Boring is good though. I'd rather have flat glucose than a fast drop with side effects.

I've tracked both for 58 weeks in a spreadsheet. My weight trend moved first, then waist, then fasting glucose. The glucose number stayed noisy for months. What helped me see it was using a 14-day average, not single mornings.

Week 36 was my worst plateau: weight flat for five weeks, then dropped seven pounds by week 44. I also noticed travel and salty food wreck the daily number, which made the plateau look worse than it was.

The trial's 72-week window makes sense because these curves are slow. Are you using weekly averages or just daily readings?

14-day average is the only way I can read mine. Daily fasting is all over the place.

My A1c went 5.8 to 5.6 by week 52, but fasting glucose bounced 98-112 the whole time. Weight was down a lot by then.

I'm only week 18, but this thread is why I started logging fasting glucose every Sunday. Curious what your 14-day average looks like.

Mine actually dropped before the scale. Opposite pattern. Bodies are weird.

Could be insulin resistance improving before fat loss shows up. Or inflammation. Not a doctor, just what I've read.

I log my fasting number every morning but only judge it by the weekly average, because mine swings 7-8 points on nothing. Week 41 for me, 22 lb down, FBG went 103 to 99 and honestly that happened in two clumps, not gradually. Weight dropped about a pound a week the whole time.

Curious whether you're testing right at wakeup or after you've been up and moving a bit? That alone moved mine 5 points.

Mine actually got worse before it got better, which I wasn't expecting. Weeks 28-33 I was sleeping maybe 5.5 hours a night through a rough stretch at work, and my fasting glucose sat at 106-108 while I was still losing about a pound a week and my waist dropped another inch.

Once I got back to 7 hours, it fell to 98-100 over about three weeks with zero change to food. My A1c is the slowest of everything; it took a full five months to go from 5.9 to 5.7 even though my fasting numbers looked better months earlier.

So I stopped expecting them to move together and just track fasting as a 14-day average.

The sleep piece tracks for me too, but adding a 20-30 minute walk after dinner is what finally nudged my morning number from 102-104 down to 96-99, and it did nothing for the scale. Weird trade.

Waist kept shrinking though, so I stopped treating fasting glucose as proof of anything about fat loss and started treating it as its own slow project.

Confession: for like two months my "fasting" draw was 45 minutes after I'd had coffee with heavy cream, because I genuinely forgot cream counted. Switching to testing before I even get out of bed dropped my average 6 points overnight.

Might be worth checking your routine before you read too much into a 3-point move over 36 weeks.

A1c only moves as fast as your red blood cells turn over, so it lags the scale by a few months. I dropped 22 lb over eight months before mine went 5.8 to 5.5 — the first four months it just sat there, same as yours.

My fasting number is also stubbornly detached from yesterday, so a single morning draw tells me almost nothing. What does your afternoon number look like?

I'll push back a little — fasting glucose is the least useful number on the whole panel for me. Mine sat at 98-104 for the better part of a year while my 2-hour post-meal reading went from the 160s down to the low 120s, and that's the one that actually tracked how I felt.

19 lb and 3 inches off your waist in 36 weeks is real fat loss.

If you have a CGM, look at the overnight and post-dinner curves instead of the morning one.

What made this way less maddening for me was switching from single readings to a 7-day average. My morning number swings 12-15 points on nothing I can identify — same dinner, same bedtime, different result.

Averaged, my trend over about 36 weeks went 103 to 99 to 96, even though any given morning looked random. Also worth saying: 19 lb and 3 inches of waist in 36 weeks usually means you're still losing fat while holding water, and a tape measure is a better referee than the scale during a slow stretch.

My last plateau was six weeks of zero scale movement while I went down a jeans size. Keep the weekly average and the tape, ignore the daily noise.