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Basics

Why your weight loss stalled

In both big GLP-1 trials, average weight loss flattened out after about a year, so a plateau is often the expected shape of the curve, not a failure.

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Plateaus are built into the math

As you get smaller, your body needs fewer calories to run. The same eating pattern that created a deficit at 240 pounds may be close to maintenance at 200.

In STEP 1 (semaglutide) and SURMOUNT-1 (tirzepatide), average weight fell steeply for months and then leveled off around week 60 to 72. See how your numbers compare with the GLP-1 weight-loss projection.

Rule out the scale first

Day-to-day weight swings of 2 to 4 pounds are normal. Salt, carbs, hormones, constipation and water all play a part.

  • Weigh at the same time, after waking, after using the bathroom
  • Look at a 2- to 4-week trend, not single days
  • Track your waist too; it sometimes drops while weight holds

The weigh-in tracker plots your trend against your projected curve.

Explainer · 0:21

STEP 1 · RESTING BURN BMR (Mifflin-St Jeor) 1,528 kcal/day woman · 35 · 5 ft 6 in · 180 lb STEP 2 · ADD MOVEMENT BMR + everyday activity × 1.375 2,101 kcal/day = TDEE STEP 3 · SET A DEFICIT TDEE minus 500 −500 1,601 kcal/day target STEP 4 · WHAT TO EXPECT 180 lb ~1 lb a week at first slows over time week 0week 30 0:21 · voiced · captions on
Your body burns energy even at rest. That's your BMR: about 1,528 kcal a day for a 35-year-old woman who is 5 ft 6 in and 180 lb.
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How your daily calories are worked out
Read the transcript
  1. Your body burns energy even at rest. That's your BMR: about 1,528 kcal a day for a 35-year-old woman who is 5 ft 6 in and 180 lb.
  2. Daily movement multiplies it. Light activity is × 1.375, so 1,528 becomes about 2,101 kcal. That's your TDEE.
  3. Eat about 500 kcal less than your TDEE and you're in a deficit: around 1,601 kcal a day.
  4. That's roughly 1 lb a week at first. Loss slows as your body adapts, so treat the number as a starting point and adjust.

Five things worth checking

  1. Your new calorie needs. Re-run the TDEE calculator at your current weight.
  2. Portion creep. Appetite effects can feel weaker over time. A one-week food log often shows extra snacks or drinks.
  3. Protein and strength work. Keeping muscle helps keep your resting burn up. See muscle loss on a GLP-1.
  4. Activity. Many people move less as they eat less, often without noticing. Check your daily steps.
  5. Sleep and stress. Short sleep is linked with more hunger and less activity.

What about the dose

Dose decisions belong to your prescriber, following the FDA label. The labels set the steps, the minimum time at each step and the maintenance options.

Bring your trend data to the appointment. It makes the conversation faster and more useful. The dose schedule tool shows the label's titration steps.

What to bring to your appointment

A short summary helps your prescriber decide whether anything should change. Bring:

  • Your weight trend for the last 8 to 12 weeks, ideally as a chart
  • Your waist measurement now versus when you started
  • Your current dose and how long you've been on it
  • Side effects, and whether they limit how much you eat
  • A typical day of eating, including drinks and snacks
  • Any new medicines, since some, such as certain antidepressants, steroids and diabetes drugs, can affect weight

Also note how you feel: energy, sleep, mood and hunger. A plateau with good energy and stable habits is a very different conversation from a plateau with constant hunger.

When a plateau is a win

Holding a lower weight steady is the goal of the maintenance phase. If your health markers, such as blood pressure, blood sugar or sleep apnea, have improved, a stable weight may be exactly where you want to be.

When to call your doctor

  • You have gained weight steadily for a month or more without a clear reason
  • You are eating very little and still not losing
  • You notice swelling, fatigue, feeling cold or other new symptoms

Run the numbers

GLP-1 weight-loss projection

Expected loss by drug, dose and week, from trial data

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Weigh-in tracker

Log weekly and compare with the trial curve

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TDEE calculator

Calories you burn a day, plus targets to lose, keep or gain

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Read next

How a calorie deficit really worksBasicsKeeping muscle while you lose weightTrainingWhat happens when you stop a GLP-1Medication

Common questions

Why did I stop losing weight on Zepbound or Wegovy?

As weight falls, calorie needs fall too, and trial data show average loss levels off after about a year. Check your trend, food intake and activity, then talk with your prescriber.

How long does a plateau last?

It varies. Short stalls of 2 to 3 weeks are common and often break on their own; a longer stall may mean you've reached a new maintenance point.

Should I eat less to break a plateau?

Cutting calories too far can cost muscle and energy. Recheck your calorie needs first and talk with your doctor or dietitian before making big cuts.

Sources

  1. Wilding et al. Once-weekly semaglutide in adults with overweight or obesity (STEP 1). NEJM 2021
  2. Jastreboff et al. Tirzepatide once weekly for the treatment of obesity (SURMOUNT-1). NEJM 2022
  3. Hall et al. Quantification of the effect of energy imbalance on bodyweight. Lancet 2011
  4. NIDDK Body Weight Planner

Clinician review pending. Drafted from primary sources and waiting for sign-off by a registered dietitian before launch. Every number is checked against its source. Drug facts are re-checked quarterly, prices monthly and whenever a label changes. How we review · Report an error