Quick answer: track a weekly average weight rather than daily readings, plus waist measurement, progress photos, side effects, appetite and your dose history. Logging those together shows whether a flat week is a real plateau, a dose change or just water. Bring the record to your prescriber, who makes every dose decision.
Educational only, not medical advice. This article explains general information and quotes official labels where noted. It doesn't recommend any dose or change to your treatment. Follow your prescriber's instructions and the product label.
Why isn't the scale enough?
Daily weight swings of 1 to 4 lb are normal. On a GLP-1 you might also be losing fat while holding water, eating less overall but less protein, or feeling side effects that change how much you eat. One number can't show any of that. Several simple measurements together can.
What should you track on a GLP-1?
Weight, as a trend
- Weigh at the same time, ideally in the morning after the bathroom, on the same scale.
- Look at weekly averages and the line over 4 to 8 weeks.
- Expect loss to be fastest early and to slow over time. In SURMOUNT-1 and STEP 1, average curves flattened after about a year.
Waist and other measurements
Waist circumference at the navel, once every 2 to 4 weeks, often keeps moving during a scale stall. Hip, chest and thigh are optional.
Progress photos
Same spot, same light, same clothes, same distance, every 2 to 4 weeks. Comparing week 1 to week 12 side by side shows changes you won't notice in the mirror day to day.
Doses and timing
Log what you took, when, and where you injected. Dose steps and missed or late doses often explain changes in appetite, side effects or the scale. See GLP-1 injection schedule basics.
Side effects and appetite
Rate nausea, constipation, reflux, fatigue and appetite on a simple scale a few times a week, especially in the days after a shot and after a dose increase. Our GLP-1 side effects guide explains what's common.
Food, protein and water
You don't need to log every bite forever, but a few days a week of rough protein and fluid totals helps. See what to eat on a GLP-1.
Non-scale wins and labs
Clothes fitting differently, energy, sleep, stairs, blood pressure, and lab results your provider orders (A1C, lipids) are all progress.
How often should you measure?
| What | How often |
|---|---|
| Weight | Daily or a few times a week, judged by weekly average |
| Waist | Every 2 to 4 weeks |
| Photos | Every 2 to 4 weeks |
| Doses | Every dose |
| Side effects and appetite | A few times a week, more after a dose change |
| Protein and water | A few typical days a week |
How do you know if it's a plateau or a slow week?
If your weekly average hasn't moved for 3 or more weeks and waist and photos haven't changed either, it's likely a stall. Our post on how long a Zepbound or Mounjaro stall lasts covers what's normal and when to call your prescriber.
What should you bring to your prescriber?
- Your weight trend since starting, with dose changes marked.
- Waist measurements and photos if you're comfortable sharing them.
- Side effects by dose.
- Any missed or moved doses.
Tracking it in Caliper
Caliper puts these in one place:
- A weight chart with your dose steps overlaid, goal line, BMI and backdated weigh-ins.
- Progress photos stored on your device, with a before-and-after Compare view.
- Check-ins to rate side effects, and a side effects vs dose chart.
- Dose logging, injection-site history, schedule and reminders.
- Meal and water logging, and Apple Health or Health Connect sync.
- A PDF report for your provider, and CSV export.
Caliper doesn't judge progress or suggest dose changes. It keeps the record so your conversations with your prescriber start from real data.
FAQ
What's the best way to track progress on a GLP-1?
Track a weekly average weight plus waist, progress photos, side effects, appetite and dose history. Together they show whether a flat week is a plateau, a dose change or water.
How often should I weigh myself on Zepbound or Wegovy?
Daily or a few times a week is fine if you judge progress by the weekly average, not single readings.
Why is my waist shrinking but the scale isn't?
Water shifts can hide fat loss on the scale. Waist and photos often keep changing during a stall.
What should I show my doctor?
Your weight trend with dose changes marked, waist measurements, side effects by dose and any missed or moved doses.
Sources
- Jastreboff AM et al., SURMOUNT-1, NEJM 2022
- Wilding JPH et al., Once-Weekly Semaglutide in Adults with Overweight or Obesity (STEP 1), NEJM 2021
- CDC, Assessing your weight
Keep the whole picture in one place
Caliper is a GLP-1 and peptide tracker. It overlays your dose steps on your weight chart and keeps progress photos, check-ins, meals, water and reminders on one timeline. It never recommends or calculates a dose.
Track your progress with Caliper →
For adults 18+.
Medical disclaimer: This article is for general educational purposes only and is not medical advice. It does not recommend any dose, compound, product, supplier or protocol. Always follow your prescriber's instructions and the product label, and talk to a pharmacist or healthcare provider about any question regarding your medication.