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Simulation shows what really goes on inside your body when injecting Mounjaro
Home>News>Science
Published 18:39 23 Jul 2026 GMT+1

Simulation shows what really goes on inside your body when injecting Mounjaro

It explains exactly how your hunger is suppressed

James Moorhouse

James Moorhouse

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Weight loss drugs have become hugely popular in the last couple of years but many people can take them without really understanding what is going on inside their body.

The sad reality is that the vast majority of Ozempic, Mounjaro and Wegovy users probably don't even need to lose weight but feel pressured to do so by the unrealistic body standards they see online.

Ever since the general public started to clock on to the fact that these GLP-1 medications led to significant and rapid weight loss, they have unsurprisingly rocketed in use, with even more powerful drugs and tablets set to arrive on the scene very soon.

Although Wegovy is available on the NHS to those who are considered eligible, many unfortunately head to online pharmacies and the dark web to find their weight loss treatments, which means that they probably don't get the same explanation of what their body is going through.

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But fear not, because if you're in need of some clarity, this article should hopefully clear up exactly what it is that Mounjaro does to your body, with some help with a simulation from TikTok, which also emphasises the bizarre nature of AI since it keeps throwing terms of endearment at the listener. Sorry, but it needed to be mentioned. You can watch it below, but be warned.


Anyway, the factual side of the video is actually pretty good as it explains how the tirzepatide (the active ingredient in Mounjaro), helps to control blood sugar levels and appetite.

The stomach will then start to empty more slowly, which allows food to remain there longer and reduces sudden spikes in blood glucose. The pancreas then goes to work by becoming more efficient at releasing insulin when blood sugar levels do rise, which is why it was originally designed as a treatment for people with Type 2 diabetes.

The body then starts to use stored fat as a source of energy which obviously helps to burn any excess fat and improve metabolic health.

Mounjaro is one of the biggest hitters in the world of weight loss drugs (Sameer Al-DOUMY / AFP via Getty Images)
Mounjaro is one of the biggest hitters in the world of weight loss drugs (Sameer Al-DOUMY / AFP via Getty Images)

So, to put it in simpler terms, GLP-1 (glucagon-like peptide-1) medications like Mounjaro work by mimicking the GLP-1 hormone, which regulates our appetite and blood sugar levels.

Although it would be wrong and worrying if your appetite levels disappear completely, it should work to reduce snacking during the day and your digestion is also slowed down, which leaves users feeling fuller for longer after meals.

Anyone who is struggling to eat at all might be using a higher dose than necessary and should speak to their doctor about appropriate dosage.

Most qualified doctors will emphasise that this is not a quick fix, nor should it be a substitute for a healthy diet or exercise, especially since people can struggle to stop regaining weight once they come off the drug, unless they can successfully wean themselves off it.

Considering the further advancements that we are likely to see in the world of weight loss drugs, it seems as if more and more people may soon feel the need to take it, but it's always best to speak with your doctor first.

Featured Image Credit: TikTok/ScienceToday

Topics: Ozempic, Mounjaro

James Moorhouse
James Moorhouse

James is a NCTJ Gold Standard journalist covering a wide range of topics and news stories for LADbible. After two years in football writing, James switched to covering news with Newsquest in Cumbria, before joining the LAD team in 2025. In his spare time, James is a long-suffering Rochdale fan and loves reading, running and music. Contact him via [email protected]

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@JimmyMoorhouse

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