How much weight have people reported losing on GLP1?

How much weight have people reported losing on GLP1?
Photo by Towfiqu barbhuiya / Unsplash

Across the internet, people are reporting and talking about losing weight with GLP1 Receptor Agonist drugs:

Don't know what a GLP1 Receptor Agonist is? Check out our quick explainer

What people are saying around the internet

Reddit is a common place to find people chatting about their experiences on GLP1:

How much weight have you lost?
by u/Ok_Background580 in Semaglutide

Reddit thread "How much weight have you lost"

How much weight did you lose during ur first month of wegovy? Just curious
by u/Map_Leading in WegovyWeightLoss

Deleted reddit post regarding weight loss

While these aren't peer reviewed, researched facts, reports by regular people are still worth considering, so we've extracted a few here:

These are some pretty impressive numbers, often with people citing no exercise!

What does the research say?

eyeglasses with gray frames on the top of notebook
Photo by Dan Dimmock / Unsplash

At this point, all the major known GLP1 Receptor Agonist compounds have had scientific studies and trial performed (usually funded in some way by the company selling the drug), so we can easily look at the research.

While the specifics of the studies differ (ex. time people were taking the drugs, makeup of the participants, etc), there are some common threads.

Semaglutide (Ozempic, Wegovy, Rybelsus)

Weight loss drugs: The science and side effects behind Ozempic and Wegovy |  New Scientist
Ozempic injection pen

The STEP1 Trials are a great place to start for Semaglutide based drugs. The Step1 Trials found that weight change at week 68 was βˆ’14.9% with 2.4-mg semaglutide, as compared with βˆ’2.4% with placebo (estimated treatment difference, βˆ’12.4 percentage points, with a high confidence interval.

This means that Semaglutide contributed to roughly 12% percentage points of weight loss over the period.

Tirzepatide (Mounjaro, Zepbound)

Mounjaro: Is It Effective and Safe for Weight Loss | The Millennial ...
Mounjaro (source:

Tirzepatide is a common and growing subset of the GLP1 drugs, Mounjaro being quite recognizable/mentioned in public.

The SURMOUNT-1 Trial is one of the most prominent trials done for Tirzepatide, and it tested various dosages, so we have some more data to compare. In this case the period measured was 72 weeks (compared to semaglutide's 68):

  • 5mg Tirzepatide caused average ~12% weight loss (15% minus placebo 3.1%)
  • 10mg Tirzepatide caused average ~16.5% weight loss (19.5% minus placebo 3.1%)
  • 15mg Tirzepatide caused average 17.9% weight loss (20.9% minus placebo 3.1%)

Liraglutide (Victoza, Saxenda)

Victoza (Liraglutide) Drug Information -
Victoza Injection pen

Liraglutide, similar to the other compounds has also had trials performed, so we can look at the SCALE trial.

The SCALE trial found that after 56 weeks, participants on Liraglutide lost an average of 8% of their body weight, whereas participants given the placebo lost 2.6%. This means Liraglutide contributed to roughly 5.4% of the average weight loss.

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