Many of these drugs were being purchased not by people with diabetes, but by individuals seeking weight loss benefits.

This line appeared in a Harvard publication in 2023, highlighting a surprising shortage of diabetes medications.

The reason was growing demand for semaglutide, the active ingredient behind several well-known medications.

Semaglutide is the active ingredient, while Ozempic®, Wegovy®, and Rybelsus® are different branded versions prescribed for different uses. Today, this same ingredient is widely recognized for its role in weight management.

Today, semaglutide 2.4 mg injection (Wegovy®) is FDA-approved for chronic weight management, with even higher doses (7.2 mg) later approved for adults with obesity or overweight individuals with weight-related health conditions. Oral semaglutide (Rybelsus® 25 mg) also received approval in late 2025 for chronic weight management following strong clinical trial results. 

But what exactly is semaglutide? How does it work? How semaglutide for weight loss works? And more importantly, who should and should not take it? We will be delving into insights of this in the coming sections so keep reading to understand better

Semaglutide: The Science Behind Its Rise in Weight Management 

Semaglutide was first approved by the FDA in 2017 for managing blood sugar levels in people with type 2 diabetes. However, during the clinical studies conducted before approval, researchers observed an interesting effect: participants were also losing weight.

One of the studies that helped shape this understanding looked at semaglutide’s impact on blood sugar control and weight loss.

A 2017 study evaluated whether semaglutide, a GLP-1 receptor agonist, could improve glycaemic control and support weight loss in adults with type 2 diabetes who were not taking any diabetes medication and were managing their condition with diet and exercise alone.

How was the study conducted?

The study mainly focused on people newly diagnosed or not yet taking diabetes medication, who were only trying to manage diabetes with diet and exercise, but still had poor blood sugar control.

The trial included 388 adults (18+ years) with type 2 diabetes who had not previously taken diabetes medication, with HbA1c (average blood sugar ) levels between 7%–10%.

Participants received either once-weekly semaglutide or a placebo (an inactive treatment) for 30 weeks.

What were the results:

The results showed that semaglutide significantly reduced HbA1c levels and body weight compared with placebo.

Though some participants experienced mild to moderate gastrointestinal side effects like nausea and diarrhoea.

Researchers concluded that semaglutide may be an effective treatment option for type 2 diabetes, offering better blood sugar control and weight management with a safety profile similar to other GLP-1 receptor agonists.

This is one of several studies showing that semaglutide can support meaningful and sustained weight loss.

And soon this information spread and in no time semaglutide became popular especially with a brand name ozempic. It was in the talks everywhere from celebrities to hospitals.But what exactly is semaglutide? Let’s understand.

Semaglutide : What it is 

Semaglutide is a drug that belongs to a class of drugs known as GLP-1 Receptor Agonists (GLP-1 RAs).

GLP-1 stands for Glucagon-Like Peptide-1. It is a natural hormone produced in the intestine and released after you eat. It helps your body manage blood sugar, appetite, and incoming energy. 

But here is the thing you should know, your natural GLP-1 doesn’t stay active for long. It gets broken down within minutes by an enzyme called DPP-4. 

This is where semaglutide comes in. It is a synthetic version Semaglutide is a synthetic version designed to resist this breakdown, allowing it to stay active in the body much longer, up to a week.

How does semaglutide work? 

Semaglutide works by attaching to GLP-1 receptors (proteins on the surface of cells) in three key areas: the pancreas, brain, and stomach.

These receptors normally respond to GLP-1, a natural hormone that helps regulate blood sugar, appetite, and metabolism. By mimicking this hormone, semaglutide helps the body function more effectively.

Here’s how semaglutide acts in these three areas: 

A. In the Pancreas (Blood Sugar Control)

When blood sugar rises after a meal, semaglutide stimulates the pancreas to:

• Increase insulin release: Helps move glucose from the blood into the cells.
• Reduce glucagon: Lowers the hormone that signals the liver to release stored sugar, helping prevent blood sugar spikes.
• Act only when needed: It mainly works when blood sugar is high, reducing the risk of hypoglycemia (dangerously low blood sugar).

B. In the brain (Appetite regulation)

This is one of the major reasons semaglutide supports weight loss. It can cross the blood-brain barrier and act on the hypothalamus, the part of the brain that controls hunger. Here’s what it does:

• Increases satiety: Helps you feel full sooner.
• Reduces food cravings: May quiet the constant thoughts about eating, often called “food noise.”
• Affects the reward system: It may reduce the dopamine-driven pleasure linked to sugary or high-fat foods, making them less tempting. 

C. In the Stomach (Digestion Speed)

Semaglutide induces delayed gastric emptying.

What does it mean for you? 

It slows down the rate at which food leaves the stomach and enters the small intestine. This helps you feel full for longer, making it easier to eat smaller portions.

Together, these effects help reduce food intake, control cravings, and ultimately support weight loss. But this brings up an important question: Who should actually take semaglutide, and who should not?

That’s where understanding this medication becomes important. Because while semaglutide may support weight loss, it is still a prescription medication, and like any medication, it comes with potential side effects beyond its intended benefits.

Side Effects of Semaglutide: What You Should Know

Like any medication, semaglutide comes with potential side effects. The most commonly reported side effects are related to digestion and include: 

• Nausea
• Vomiting
• Diarrhoea
• Constipation
• Bloating or indigestion

The good news is that these are usually mild to moderate and tend to be more noticeable in the first few weeks or after a dose increase, often improving with time.

However, while the common side effects are usually manageable, some serious side effects have also been reported and require immediate medical attention. These include:

• Pancreatitis: Severe upper stomach pain that may spread to the back
• Gallbladder issues: Pain, fever, or jaundice (yellowing of the skin/eyes)
• Kidney injury: Reduced urination or leg swelling, often linked to dehydration
• Vision changes or allergic reactions: Rash, swelling, or difficulty breathing
• Potential thyroid tumor risk: Symptoms like a lump in the neck or trouble swallowing

Now that you understand how semaglutide works and its potential side effects, the next important question is: Who should take semaglutide, and who should avoid it?

Who should (and should not) take semaglutide for weight loss? 

Semaglutide for weight loss is not meant for everyone. According to FDA recommendations, it may be prescribed for adults who:

• Have a BMI of 30 or higher (obesity)
• Have a BMI of 27 or higher along with a weight-related health condition such as high blood pressure, type 2 diabetes, or high cholesterol

However, semaglutide may not be suitable for people with a history of:

• Medullary thyroid cancer
• Gallbladder disease
• Pancreatitis
• Multiple Endocrine Neoplasia Syndrome Type 2 (MEN2)

This makes one thing clear: semaglutide may work well for some, but it is not the right fit for everyone.

Semaglutide Can Help, But Here’s What Really Matters 

If you’re considering semaglutide, the first step should always be consulting your healthcare provider to assess whether it is safe and appropriate based on your medical history and current medications.

It’s also important to remember that medication is not the only path to weight loss. And semaglutide does not work in isolation. While it may support weight management, sustainable results still depend on the right lifestyle support.

This is where a GLP-1 supportive diet can make a real difference. Since these medications can affect appetite, digestion, and nutrient intake, the right nutrition can help manage side effects, support gut health, preserve muscle mass, and improve overall outcomes. 

At Ranfort Wellness, we believe wellness is not just about managing symptoms, but building sustainable health. Whether you’re looking for a structured weight loss plan, nutrition guidance while taking GLP-1 medications, or dietary support to help manage side effects, our team is here to support your journey. 

FAQs

Q1. What can too much GLP-1 do to your body?

Ans. Too much GLP-1 activity can lead to severe nausea, vomiting, stomach pain, and diarrhoea, mainly because of its strong impact on digestion.

Q2. What are the side effects of GLP-1 medications?

Ans. The most common side effects of GLP-1 receptor agonists like semaglutide are digestive and may include nausea, vomiting, diarrhoea, constipation, bloating, and abdominal discomfort. These are usually more noticeable when starting the medication or after a dose increase, and often improve over time.

Q3. Who should avoid semaglutide?

Ans. Semaglutide may not be suitable for people with a history of medullary thyroid cancer (MTC), MEN2, pancreatitis, or severe digestive conditions like gastroparesis. It should also be avoided during pregnancy, breastfeeding, or when planning pregnancy. Since this is a prescription medication, always consult a healthcare provider before starting it.