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- ‘Mounjaro vs Wegovy’ — Which Is Better? The Ultimate Comparison of Weight-Loss Injections -
As Mounjaro is also expected to be launched in Korea, excitement is growing.
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If you’re curious about what makes Mounjaro and Wegovy, the injections that are hot topics for dieting these days, different, read on!
“My friend lost 8 kg after using Wegovy, so why am I like this?”, “Mounjaro is supposed to be newly released—does that mean it works better?”
They may look similar, but in fact these two differ in everything from their mechanism of action to their effects.
If you want to lose weight and manage your blood sugar at the same time, be sure to read this post all the way to the end!


Source: Pharmaceutical Product Change Approval Report

Mounjaro approval details

Mounjaro safety review items and measures
Aren’t they all just the same kind of diet injection?
Not every obesity-treatment injection is the same.
Mounjaro (ingredient name: tirzepatide), which is expected to be introduced in Korea, and Wegovy (semaglutide), which is already in use,
are both convenient once-weekly injections, but their mechanisms of action, weight-loss effects, and indications are different.
Knowing these differences accurately is the key to effective weight loss and health management.
“Have you been using Saxenda or Wegovy for months, but hit a plateau?”
“People say Mounjaro leads to more weight loss than Wegovy—should I switch?”
“I also need to manage my blood sugar—what would be better?”
Understanding the key differences between the two injections helps you choose the medication that suits your body.

A summary of the features of Mounjaro and Wegovy at a glance.
Why is Mounjaro considered stronger?
- Dual-action mechanism
Mounjaro stimulates both the GIP and GLP-1 hormone receptors at the same time, leading to stronger satiety and appetite suppression.
At the same time, it also improves insulin sensitivity, making it excellent for blood sugar management as well.
- Weight-loss effects confirmed by clinical results
After 72 weeks of treatment, Mounjaro showed an average weight loss of 22.8 kg, while Wegovy showed 15 kg.
-> About an 8 kg difference, which is quite significant, right?
- Cost efficiency
Based on overseas data, Mounjaro was analyzed as having a lower cost per 1% of body-weight loss.
This is based on overseas standards, and further confirmation is needed when considering the BMI and clinical characteristics of Korean patients.
Which injection is better for whom? Here are the recommendations from an obesity specialist...
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For those with a large weight-loss goal and who also want blood sugar management → Mounjaro recommended
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For those for whom cardiovascular disease prevention is also important in addition to obesity → Consider Wegovy
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For those who have already seen results with a GLP-1 single-agent medication → Wegovy can be continued
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For those who feel their GLP-1 effect has plateaued → Consider switching to Mounjaro
However, all medications require a prescription after consultation with a specialist!
A personalized plan is important, taking into comprehensive consideration your health condition, medical history, and target weight.
Both injections are clearly powerful obesity treatments.
But choosing the medication that best suits your body is the key to “sustainable weight loss.”
We will design the optimal treatment through one-on-one customized consultation by considering effectiveness, side effects, price, and purpose.
This has been Merry Plastic Surgery Clinic, where it’s always a pleasure to meet you.