In recent years, the development of medications for the treatment of obesity and being overweight has made significant progress. GLP-1 agonists are a particular focus. These active ingredients, which are also approved in Germany as weight-loss injections, have proven to be groundbreaking in the treatment of obesity and offer many patients new hope for effective weight loss.
In this article, we provide you with an overview of the various weight-loss injections, how quickly they work, and how much weight you can lose with them. Furthermore, we will also shed light on strategies for weight loss without the use of medication, so that you are aware of all the options to reach your goal weight.
Which active ingredients are available and how much weight can you lose with them?
The goal of using these medications is not to lose a few kilos quickly, but to achieve sustainable and healthy weight loss that can be maintained in the long term. The medications support this process by reducing feelings of hunger and influencing the metabolism, but success depends significantly on a long-term change in lifestyle.
There are several active ingredients used in weight-loss injections. Among the best-known are:
Active ingredient Semaglutide (Wegovy, Ozempic):
Mechanism of action: Semaglutide is a GLP-1 receptor agonist that mimics the hormone GLP-1, which regulates appetite and slows stomach emptying. This leads to a longer feeling of satiety and a reduction in food intake.
Weight loss: Studies show that users can lose 10–20 percent of their body weight within a year.
Administration: Weekly injection.
Active ingredient Liraglutide (Saxenda, Victoza):
Mechanism of action: Similar to semaglutide, liraglutide acts as a GLP-1 receptor agonist. It reduces feelings of hunger and promotes a feeling of satiety, which leads to a reduced calorie intake.
Weight loss: Users can lose about 5–10% of their body weight with liraglutide within a year.
Administration: Daily injection.
Active ingredient Tirzepatide (Mounjaro):
Mechanism of action: Tirzepatide is a dual GIP/GLP-1 receptor agonist. It acts on both the GIP (glucose-dependent insulinotropic polypeptide) and the GLP-1 systems, leading to greater appetite reduction and improved insulin sensitivity.
Weight loss: In studies, users have lost up to 15–22% of their body weight.
Administration: Weekly injection.
Naltrexone/Bupropion (Mysimba, Contrave):
Mechanism of action: This combination influences the brain's reward system and the hunger center, thereby decreasing appetite and reducing cravings for food.
Weight loss: Users can lose 5–10% of their body weight within a year.
Administration: Oral intake (tablet).
Phentermine/Topiramate (Qsymia):
Mechanism of action: Phentermine acts as an appetite suppressant, while topiramate was originally used as an anticonvulsant. Together, they work by suppressing appetite and increasing energy expenditure.
Weight loss: Loss of 5–15% of body weight within a year.
Administration: Oral intake (tablet).
How quickly can one lose weight with GLP-1 drugs?
The speed of weight loss varies depending on the active ingredient and individual factors such as diet, physical activity, and metabolism. Here are some general guidelines:
- In the first weeks: You will likely notice a moderate weight loss of 1–3 kilograms per month.
- After 3 months: A significant weight loss of about 5–10% of body weight is possible. Tirzepatide can lead to even greater losses during this period.
- After one year: Depending on the active ingredient, you can lose 10–22% of your body weight. The highest results in studies were observed with tirzepatide and semaglutide.
Clinical studies have shown that patients taking Wegovy lose an average of 15 percent or more of their body weight over a period of 68 weeks, especially when the medication is combined with a lifestyle modification program.
Losing facial fat and losing weight in the face. Is that possible?
Many people hope to use weight-loss injections to target fat loss in the face. However, since fat loss cannot be targeted, it depends on the individual fat distribution pattern when and to what extent the face is affected. Weight-loss injections that lead to significant overall weight reduction can also make the face appear slimmer, although this is not always the first area where you lose fat.
As a rule, the body loses fat in a specific order that is genetically and hormonally determined. First, the body usually breaks down visceral fat, which is located around the internal organs in the abdominal cavity. This is followed by subcutaneous fat, which accumulates under the skin in various parts of the body. Typically, people first lose fat in areas where it is stored most loosely, such as in the abdominal area, before fat is lost in the extremities and finally the face.
This process can vary individually, which is why it is not unusual for some people to notice changes in their face sooner, while for others, the face only becomes slimmer after a significant reduction in total body fat. Ultimately, the order in which fat disappears depends heavily on genetics, hormonal balance, and individual fat deposits.
No weight loss! Why am I not losing weight?
There are several reasons why you might not be losing weight despite using weight-loss injections:
- Poor diet: If you continue to eat calorie-dense or sugary foods, this could neutralize the effect of the medication.
- Lack of exercise: Physical activity is crucial for increasing calorie burn and supporting weight loss.
- Metabolic adaptation: Your body may adapt to the reduced calorie intake, leading to a weight-loss plateau.
- Medical reasons: Hormonal imbalances or other health issues could also play a role.
How can one lose weight quickly? – A comprehensive approach with a weight-loss injection
If you would like to lose weight quickly, weight-loss injections like GLP-1 agonists are a promising option, but they should always be considered part of a comprehensive approach. Diet, exercise, and consistency play a central role. The following section explains in detail how these components interact and how they differ from traditional diets without GLP-1 medications.
Dietary changes: The foundation for successful weight loss
A low-calorie, balanced diet is the cornerstone of any successful weight loss, regardless of whether you are using GLP-1 agonists or not. When using weight-loss injections, the right diet supports the medication's mechanism of action and maximizes weight loss. Here are some key points:
Macronutrients: A balanced diet with a high proportion of vegetables, lean proteins (such as poultry, fish, tofu), and healthy fats (such as avocado, nuts, olive oil) promotes satiety and provides essential nutrients. GLP-1 agonists can help reduce cravings for unhealthy, carbohydrate-rich foods.
Without GLP-1 medications, you may need to make more conscious decisions to control your appetite and stick to healthy alternatives.
Caloric deficit: The key to weight loss
In theory, losing weight is based on a simple principle: A caloric deficit is necessary for your body to start burning fat reserves. This means you must consume fewer calories than your body burns during the day. This deficit forces the body to use stored energy in the form of fat, which ultimately leads to weight loss.
How GLP-1 agonists make a caloric deficit easier
GLP-1 agonists, such as semaglutide in Wegovy and Ozempic, play an important role in making it easier to reach and maintain a caloric deficit. These medications work by significantly reducing feelings of hunger and increasing feelings of satiety. This causes you to eat less naturally and makes it easier to control your calorie intake.
Without the support of GLP-1 agonists, it often requires more discipline to curb appetite and change eating habits. You have to consciously pay attention to portion sizes, count calories, and potentially resist cravings, which makes it harder to achieve a consistent caloric deficit. GLP-1 agonists significantly reduce these challenges by decreasing the urge for excessive meals and snacks and helping you feel full faster.
Blood sugar control, not just for diabetes
Why blood sugar control is more than just a matter of diabetes:
Controlling blood sugar levels is a central aspect of weight loss that goes far beyond the benefits for diabetics. Whether you use GLP-1 agonists or choose a drug-free approach, stable blood sugar control is the key to avoiding cravings, keeping your energy levels stable, and successfully losing weight in the long term. Blood sugar fluctuations can have a significant impact on your eating behavior and energy level. When glucose levels rise sharply and then fall quickly, as often happens after eating sugary foods, this can lead to cravings and overeating. GLP-1 agonists help minimize these fluctuations by keeping blood sugar stable after meals. This not only reduces the risk of cravings but also ensures that you feel full longer and therefore eat less.
A stable blood sugar level means not only that you feel less hungry, but also that your energy levels remain constant throughout the day. Without strong blood sugar fluctuations, you are less susceptible to the "afternoon slump" that often leads to unhealthy snacking habits. With GLP-1 agonists, you can therefore not only control your appetite better but also improve your productivity and general daily well-being.
Another interesting aspect of blood sugar control through GLP-1 agonists is the long-term health benefit that goes beyond weight loss. Stable blood sugar can reduce the risk of developing insulin resistance and type 2 diabetes. Even if you are not diabetic, good blood sugar control helps your metabolism function optimally, which in turn supports weight loss and general well-being.
Even though GLP-1 agonists are effective at blood sugar control, there are other strategies you can pursue if you are not using these medications.
Alternative strategies for blood sugar control without GLP-1 agonists
- Fiber-rich diet: Fiber slows down digestion and sugar breakdown, which can prevent blood sugar spikes after meals.
- Small, frequent meals: By eating smaller meals throughout the day, you can avoid sharp blood sugar fluctuations and control hunger better.
- Low-glycemic foods: Foods with a low glycemic index (e.g., whole grains, legumes, vegetables) lead to a slower rise in blood sugar levels and prevent rapid crashes.
Weight loss: The role of physical activity
Regular exercise is an indispensable part of a comprehensive weight-loss program, especially if you want to lose weight quickly. Exercise increases calorie burn, supports fat loss, and helps maintain muscle mass. The difference in the effect of exercise with or without GLP-1 agonists lies in effectiveness and the preservation of muscle mass.
Strength training:
Strength training is crucial for building and maintaining muscle. Muscle mass is metabolically active and helps to increase the basal metabolic rate, which supports weight loss. With GLP-1 agonists, strength training can be particularly effective because the medication helps reduce total body weight, while the training minimizes muscle loss.
Endurance training:
Cardio training, such as running, swimming, or cycling, increases calorie burn and improves cardiovascular health. When using GLP-1 agonists, endurance training can enhance fat loss and improve overall fitness. Without these medications, endurance training can also be effective, but may require more effort to achieve similar results.
Exercise and motivation:
GLP-1 agonists can increase motivation, as early successes in weight loss often lead to a greater willingness to be physically active. Without medication, it can be more challenging to maintain motivation, especially if weight loss occurs more slowly.
Consistency: The key to long-term success
Consistency is the most important factor to achieve sustainable results, whether you are using weight-loss injections or not. To successfully lose weight and keep it off, you must consistently follow your treatment plan.
Regular administration - appetite-controlled
If you use GLP-1 agonists, it is important to use the injections regularly and according to the instructions. Irregularity in usage can reduce the effectiveness of the medication and slow down weight loss. Without these medications, consistency in following a diet and exercise program is even more critical, as you rely on your body's natural appetite regulation mechanisms.
Monitoring and adjustments
Regular monitoring and self-tracking (e.g., by weighing yourself, measuring your waist, and recording eating habits) are crucial to monitor progress and make adjustments if necessary. With GLP-1 agonists, close cooperation with medical professionals is necessary to optimize the dosage and course of treatment. Without medication, you may need to respond more flexibly to plateaus and challenges by adjusting your diet and training program.
Long-term thinking
Weight loss is a marathon, not a sprint. Even if you want to lose weight quickly, it is important to keep sustainable success in mind. GLP-1 agonists can help you lose weight faster, but long-term success depends on continuing healthy habits. Without medication, you may need to be more patient, but the results are just as sustainable if you remain consistent.
Comparison: Diets without GLP-1 agonists
Diets without the support of GLP-1 agonists generally require more discipline and self-control, especially regarding appetite regulation and avoiding cravings. While GLP-1 agonists can help you feel full longer and keep blood sugar levels stable, without this support, you must pay closer attention to portion control and consciously avoiding calorie-dense foods.
A traditional diet program can also be successful, but the speed of weight loss is usually slower, and the challenge of controlling hunger is greater. In the long term, both approaches can lead to successful weight loss, but the use of GLP-1 agonists can speed up and facilitate the process.
Conclusion: How fast can I lose weight with the weight-loss injection?
Weight loss injections offer a promising way to lose significant weight, but success depends on many factors. Choosing the right active ingredient, adjusting your diet, and regular exercise are crucial to achieving the best possible results. Each active ingredient has its own benefits and potential side effects, and it is important to choose the best option for your individual needs in consultation with a doctor.
The development of GLP-1 agonists and similar medications marks a significant advance in the treatment of obesity and being overweight. With the approval of Wegovy in 2022 and further developments such as the extension of approval for adolescents in 2023, as well as the market launch of tirzepatide for weight loss, a variety of new therapy options are now available for people with severe obesity. Medical professionals are optimistic that these medications will have a permanent place in obesity therapy, especially since they also offer significant benefits in the treatment of comorbidities such as diabetes.
With ongoing research and continuous monitoring by physicians, it is ensured that these therapies remain safe and effective and can help many people lead a healthier life.
The speed and extent of weight loss vary depending on the active ingredient and individual lifestyle.
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Weight you could lose (kg):
By maintaining patience and consistency, you can make significant progress with weight loss injections and reach your target weight. By sticking to a comprehensive plan and regularly reviewing your progress, you can not only lose weight quickly but also ensure that the results are maintained long-term.
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