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The Uncomfortable Truth About Ozempic (Updated Version)

15:35EnglishBy Kurzgesagt – In a NutshellTranscribed Jul 13, 2026
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0:00

In the last few years Ozempic or  Mounjaro managed to make millions

0:04

of people lose massive amounts of weight  with seemingly only mild side effects.

0:09

More than one in eight US  adults have tried the drugs,

0:11

and for the first time in history the  country’s obesity rate actually fell.

0:15

At the end of 2025 the WHO added GLP-1 drugs to its Essential Medicines List for diabetics

0:22

and released guidelines on how to use it for obesity.

0:25

For the first time ever, we  have a medication that reliably,

0:28

quickly and seemingly safely  can make people lose weight.

0:32

Sometimes massive amounts of weight.

0:34

But as with most things related to nutrition,

0:37

health and weight loss these  medications are controversial.

0:41

There are many aspects to GLP-1s,  but we will focus on one today:

0:45

The potential medical revolution  these drugs could mean for obesity,

0:48

one of the most deadly chronic  diseases of our time that over

0:52

one billion people suffer from and that  remains largely unsolved and underfunded.

0:57

It turns out GLP-1 drugs are the first effective  medical treatment for obesity in medical history.

1:03

The Obesity Trap

1:05

In 2025 more than half of Europeans  were either overweight or obese,

1:10

plus one in three children.

1:11

And in many countries like the US, Mexico, Chile  or Saudi Arabia the numbers are even worse.

1:17

Today this kills almost 4 million people each year and if trends continue,

1:22

by 2050 one in three adults on Earth will be  obese and half of humanity will be overweight.

1:28

When hearing the word obese most  people think of the extreme ends

1:31

of the spectrum, but this is not correct.

1:34

It’s not very helpful that  the definition of obese is

1:37

a bit vague because bodies are pretty different.

1:40

So it can be a BMI of over 30,  your waist to hip ratio or a

1:44

body fat percentage of over 25%  for men and over 32% for women.

1:49

In the end obese is a medical term that doesn’t

1:51

judge how you look but if you have  an unhealthy amount of body fat.

1:56

How did we get here?

1:57

For most of our history, food was scarce.

2:00

So when our ancestors found a calorie  bomb, binging on it was the best of ideas.

2:05

The more sugar, fat and salt the better!

2:08

Our brains are wired to love these foods, they bring pleasure, enjoyment and mental release.

2:14

This helped us survive in a world where food was  the most important thing to worry about each day.

2:19

And then the world changed overnight and suddenly  our modern food environment hijacked our biology.

2:24

Food is a product now and has become cheap, calorie-dense and hyperpalatable

2:29

– which means it has been  engineered with addictive levels of sugar,

2:32

fat and salt – making our reward  centers go ballistic with joy.

2:37

About half of the products in a US grocery  store are ultra processed and many are

2:41

labeled in ways that are deeply misleading,  like the serving sizes on packs of chips.

2:46

Marketing strategies like value pricing and  constant food ads stimulate us to eat more.

2:52

So most people overeat regularly,  sometimes without even noticing.

2:56

And this is very subtle – most people don’t  get overweight because they massively lack

3:00

self control, they just eat a little  bit too much over a long period of time.

3:05

Just a small excess, like the  equivalent of half a snickers over

3:08

your maintenance calories per day, compounds  to almost 5 kg or 10 pounds of fat after a year.

3:15

This is how most people get  obese, slowly bit by bit.

3:19

Since being overweight is also shamed on top of being unhealthy,

3:23

we tried to fix our overeating behavior  with all sorts of… well, behavioral methods.

3:28

The world is filled with diets and healthy habits  campaigns – but if we look at the results,

3:32

just telling people to eat healthier foods and  to move more does very little in the real world.

3:37

Most people gain back most  weight they lose during a diet,

3:40

within a year or two, and  often gain more afterwards.

3:43

Often through little fault of their  own, because once you do lose weight,

3:46

your body is also working against you by trying to  bring you back to the fat baseline it was used to.

3:52

Really the only reliable way to do it  is a lifestyle change – not a break

3:56

from calorie-dense food but a lifestyle where  you eat it only occasionally or not at all.

4:01

Which is not just very hard but also feels like  saying no to some of the best things in life.

4:06

Finally there is simply: Hunger, a really  strong and hard to ignore signal from your body.

4:12

How hungry you are is genetic,  so just through bad luck,

4:15

you may experience a lot of food  noise and think about eating a lot.

4:19

And to make things worse, in many  people who get overweight or obese,

4:22

their hunger signal becomes dysregulated  – not necessarily permanently, but even

4:27

after losing weight it can take a long time  before your hunger adjusts downwards again.

4:32

And this is exactly where GLP-1  drugs interact with our biology.

4:37

Before we get there, let’s fix something easier  first – how we engage with the news every day.

4:43

Our partner Ground News is a  website and app built to help

4:46

you think critically about the information  you consume – a mission we fully support.

4:51

They curate news articles from across the  globe, adding context on political bias,

4:56

reliability, ownership, and summaries that  highlight what each side is leaving out.

5:00

You can even compare headlines to  see how bias shapes the narrative.

5:04

The same weight-loss drug story might  be framed as a miracle by some outlets,

5:08

while others warn about harmful trends.

5:10

Ground News also reveals "blind spots" –  stories that only one side is covering,

5:15

showing you what your usual news feed is hiding.

5:18

As information bubbles are becoming the norm,

5:20

thinking critically about the  news is no longer optional.

5:23

And Ground News makes it easier to do just that.

5:26

If you’d like to give them a try,

5:28

go to ground.news/nutshell, or  scan the QR code on the screen.

5:32

Using this link gives you 40%  off an unlimited access subscription,

5:36

and directly supports our channel.

5:38

And now back to losing weight!

5:41

Your Hunger Is Hormones

5:43

Many eating behaviors – eat now or later,  chocolate or vegetables – are actually

5:48

governed by an orchestra of hormones  that are not within your control.

5:52

You are not hungry in the evening because  you decide to be or because this is when

5:56

your body needs energy, but because  your body releases certain hormones.

6:00

And it turns out your fat is one of  the major regulators of this orchestra.

6:04

If you are overweight or obese, the excess fat  is throwing your hormonal orchestra out of tune.

6:10

This may make you more hungry  or push you to overeat more,

6:13

creating insulin resistance that  causes type 2 diabetes and so on.

6:17

We made a video if you want details.

6:19

But there is one specific hormone  that plays its tune quietly in the

6:23

background, even in obese people – the  “glucagon-like peptide-1”, or GLP-1.

6:29

It is one of the hormones your  body releases after a meal.

6:33

It tells your pancreas to release more  insulin to keep blood sugar in check

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and slows down your digestion  to keep food in your stomach.

6:40

And in your brain, it increases your feeling of  

6:42

fullness and being satisfied  – curbing your appetite.

6:46

These effects are usually modest.

6:48

Once in your bloodstream, GLP-1 disappears in  barely two minutes, its song quickly fading away.

6:55

So one day scientists had an idea – what  if we made artificial copies of GLP-1,

7:01

that play the same song but louder  and much longer? A GLP-1 signal that

7:06

stays in your body would boost  insulin and silence appetite.

7:11

The first artificial GLP-1 was approved in  2005 for diabetes and in 2014 for obesity,

7:17

but the revolution came with semaglutide  and tirzepatide – Ozempic and Mounjaro.

7:23

Really powerful GLP-1 agonists that play their  songs in your bloodstream for up to a week.

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They send out a loud and steady signal  that dials down your appetite 24/7.

7:34

You still enjoy food, but you feel  full and satisfied much sooner,

7:38

making it easy to not overeat.

7:40

And since the song never really switches off,

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you feel less hungry throughout  your day, making you eat less often.

7:47

How intensely you feel hunger is largely genetic,  so especially people who suffer from food noise,

7:53

a constant urge to eat, feel a huge  psychological relief from the drug.

7:58

Finally their body stopped screaming at them.

8:01

Suddenly, you are dieting without expending willpower, without really thinking about it – it feels magically effortless.

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By changing your biology, a  drug changed your behavior.

8:12

But uhm… is this a good thing?

8:16

Miracle Drugs

8:18

On the weight loss side, these  drugs are incredibly effective.

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In 3 months you can lose  10% of your initial weight.

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Three months later, over 15.

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And after a year, you may reach more than  20% – a level of weight loss that used to

8:33

only really be achievable  through bariatric surgery.

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In other words GLP-1 drugs make excess  weight melt away like nothing before.

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We can’t stress enough how unhealthy obesity is,

8:45

causing everything from diabetes  to heart attacks and cancer.

8:49

So the consequences for health are stunning.

8:52

Treatment with semaglutide cuts your  risk of stroke or heart attack by 20%.

8:57

17 months of tirzepatide crashes your  chances of developing diabetes by 66%.

9:03

They also reduce sleep apnoea,  improve kidney and liver function,  

9:07

lower inflammation, cut cancer risk,  and may potentially slow Alzheimer's.

9:12

They might even boost fertility,

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as obesity often disrupts hormones and  increases complications during pregnancy.

9:20

And there may be more positive long term effects.

9:23

Some of these benefits are a  direct result of weight loss.

9:26

But intriguingly, they sometimes occur  regardless of how much weight has been lost,

9:31

and some have been seen in patients  who weren’t obese to begin with.

9:34

We don’t know why yet, but it seems like  turning up the GLP-1 signal is synchronizing

9:39

the whole metabolic orchestra, restoring  a balance between brain, gut and body.

9:44

And as if that weren’t enough,  GLP-1 drugs may also quiet other

9:48

cravings – they seem to reduce the use of  alcohol, nicotine, cannabis and opioids.

9:54

Large trials are underway  to confirm these effects.

9:57

If the results hold, they could become something  unprecedented: real anti-addiction drugs.

10:04

But of course there are side effects.

10:07

Most commonly nausea, vomiting,  diarrhea and constipation – not fun,

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but usually harmless and fleeting  for the vast majority of patients.

10:15

More serious stuff like pancreatitis,

10:18

kidney problems or gallbladder disease do  happen, but for well under 5% of people.

10:23

So it is pretty risky to take these  drugs without medical supervision and

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in extreme cases thes can land  you in the emergency room.

10:30

While these drugs are not really that new, since  diabetics have been using them for decades,

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because now millions of people are using them, we might discover new side effects in the coming years.

10:41

Apart from this, the main downside of GLP-1 drugs

10:43

may come from their greatest  strength – rapid weight loss.

10:47

If you don’t actively check what you eat, taking  these drugs is just an unhealthy crash diet.

10:51

Any steep calorie deficit requires  resistance training and plenty of protein,

10:56

or else you’ll lose a lot of  muscle along with the fat.

10:59

That’s harmful at any age,  but especially after 40,

11:02

when building muscle gets harder and  the risk of falls starts to rise.

11:07

So while these drugs change your  biology, they don’t do all the

11:11

work for you – staying healthy still  requires you to adopt healthy habits.

11:15

In the end the same is true for these drugs as  is for any other diet: Without a lifestyle change

11:21

you either have to use the drugs forever  or you will probably gain the weight back.

11:25

After about a year the weight loss slows  down and eventually stops in most people.

11:30

At this point you usually  stop using the medication.

11:33

If you used that time to change your  eating habits you have a really good

11:36

chance of keeping the lost weight off!

11:38

But about 25% regain a significant chunk, and some 20% put back on all of it.

11:44

So for many, maintaining the results  may mean staying on the drug forever.

11:49

Is this a bad idea? Well, we don’t know.

11:53

The newest generation of drugs is just  too new so there is no long term data.

11:58

The first GLP-1’s from 2005  haven’t shown major issues.

12:02

Based on what we know today,

12:03

it seems pretty clear that living with obesity is  much unhealthier than living with the drugs.

12:08

And to be crystal clear: this doesn't  mean that these drugs are for everyone.

12:12

If you want to lose a couple of pounds  but are otherwise healthy and have no

12:15

chronic disease these drugs were not made for you.

12:18

You really should really go the traditional  route first before you start injecting drugs.

12:23

Using it to get to unhealthy amounts of low  body fat is definitely not a great idea.

12:28

In a nutshell: The best things these drugs  do is to remove the pressure of intense

12:33

hunger and food noise, to give you a time  window where you can change your habits.

12:37

You still need to change your habits  though, no drug can fix that for you.

12:42

Conclusion and Opinion

12:45

A recent study modeled what would  happen if millions of US adults who

12:49

are obese or overweight got GLP-1 drugs for life.

12:53

In just 2 years, about 50% of all  obesity in the country would vanish.

12:58

Over the years, it would prevent  26 million cases of diabetes,

13:03

13 million cases of heart disease,  and 5.5 million premature deaths.

13:08

Which seems like a pretty good thing.

13:10

And new drugs that are in final  trials promise to work even better.

13:15

Defeating obesity suddenly feels within reach.

13:18

Right now, the biggest obstacles are  actually supply shortages and high prices,

13:23

which make these drugs inaccessible  for many who actually need them.

13:26

Patents for the semaglutide and  tirzepatide will expire soon in  

13:30

many countries and prices for  them will collapse as a result.

13:33

In the long run, increased production and  plummeting costs seem almost guaranteed.

13:39

Soo… should we just inject obesity away?

13:43

Well for now at least it seems that there are  few downsides – although please don’t listen

13:48

to internet videos and talk to your doctor  before you make any decisions for yourself.

13:54

It’s also important to remember that  while these drugs are immensely helpful,

13:58

they are not magic – they make a hard thing easier

14:01

but it still requires you to change  your habits and put in some effort.

14:05

They can gain us the time we need  to fix the root causes of obesity.

14:10

But it does seem the future just  got a whole lot healthier.

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