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The concept of the glycaemic index (GI) was introduced by researcher David Jenkins and his colleagues more than 40 years ago as a way to describe how carbohydrates affect blood sugar. Foods with a low GI produce a slower, more even rise in blood sugar, while foods with a high GI raise blood sugar more quickly. In this article, we go through how GI works, what the research says, and the pros and cons.

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In the early 20th century, doctors discovered that ketosis – a state in which the body uses fat as its main source of energy – could reduce severe epileptic seizures. Today, the ketogenic diet is best known in the context of weight loss and health, with promises of rapid weight loss and improved metabolic health. But what actually holds true? In this guide, we explore the relationship between ketosis, weight loss, and health.

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Fasting and intermittent fasting are popular ways to lose weight and improve health – for example through 16:8 schedules and the 5:2 approach. Many people experience better appetite control and a clearer daily structure, but the method is not suitable for everyone and may involve risks. In this guide, we go through what fasting is, its potential benefits and risks, and how it can be combined with Yazen’s comprehensive treatment for overweight and obesity.

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Intermittent fasting is a popular way to reduce energy intake for weight loss. For some people, it can be a helpful support on a weight journey, but it’s not right for everyone and needs careful thought to be safe and sustainable. In this article, we look at how intermittent fasting works, potential benefits, and risks you should be aware of.

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There are many myths and prejudices surrounding overweight and obesity. They are deeply rooted in society and can create guilt, shame and misunderstanding, despite obesity being a complex medical condition influenced by biology, environment and living conditions. When myths dominate the conversation, they obscure what actually helps. In this article, we address common misconceptions and highlight knowledge that truly makes a difference.

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Body mass index (BMI) is a commonly used measure of the relationship between weight and height in weight loss and obesity treatment, but it does not provide the full picture of your health. At Yazen, we therefore complement BMI with body measurements and body composition to gain a better understanding of your body and develop more individualised strategies for sustainable weight loss.

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Mysimba is a prescription medication in tablet form used for the treatment of overweight and obesity. It contains the active substances naltrexone and bupropion, which together affect the brain's appetite and reward systems.

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Every second, your body uses energy. Your brain needs fuel to think, your heart to keep beating, and your lungs to fill with air. Even when you are lying still, your body is constantly working in the background. All of this requires fuel. Metabolism, also known as metabolic rate, is the process by which the body converts food into energy.

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Effective fat burning isn’t about extreme methods – it’s about understanding how the body uses energy, how you can increase your expenditure, and how to build habits that last for more than just a few weeks. Many people who want to lose weight think they need to do everything “perfectly”, but in reality it’s about finding long-term, sustainable strategies combined with training, nutrition, and more daily movement.

According to the WHO, overweight and obesity affect nearly 60 per cent of the adult population in Europe, highlighting the need for integrated treatment strategies that combine medical therapy with lifestyle changes (1).

We are in a new era of obesity treatment. GLP-1-based medicines have transformed the landscape – but real success is achieved when medication becomes part of a comprehensive approach that supports the whole person.

Long-term health and weight loss require more than medicine alone. It is when medical treatment is combined with lifestyle change and continuous guidance that meaningful, lasting progress becomes possible (1–2).

Trulicity is a medicine that contains the active substance dulaglutide. It is approved for the treatment of adults with type 2 diabetes to improve glycaemic control as a complement to a healthy diet and physical activity (1). The treatment may also contribute to weight loss (2–4).

Saxenda is a medicine used as support in the treatment of overweight and obesity. It contains the active substance liraglutide, which influences appetite regulation and helps reduce energy intake. When combined with lifestyle changes such as a healthy diet and regular physical activity, the treatment can support clinically significant weight loss (1).

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Weight loss can bring significant positive changes for both health and wellbeing. At the same time, many people experience loose skin after substantial weight loss, especially if the weight has decreased rapidly or if they have lived with overweight or obesity for a long time.

Loose skin is a natural result of changes in the skin’s elasticity as the body adjusts. By understanding how the skin is affected after weight loss and which factors influence its elasticity, you can give the skin better conditions to tighten and feel firmer again.

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Rybelsus is an oral treatment option used for type 2 diabetes and which in some cases may be relevant within obesity treatment. The medication contains the active substance semaglutide – the same substance as in Ozempic and Wegovy – and works by mimicking the body's own satiety hormone GLP-1. This contributes to reduced appetite, increased feeling of fullness, and delayed gastric emptying.

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Mounjaro contains the active substance tirzepatide and is used for the treatment of adults with type 2 diabetes as a supplement to diet and exercise. The medication contributes to lowering blood sugar levels in a glucose-dependent manner.

Mounjaro is also used for the treatment of adults with obesity (BMI ≥30 kg/m²) or overweight (BMI ≥27 kg/m² with at least one weight-related complication). By affecting the body's appetite regulation, the treatment can contribute to weight loss through reduced energy intake.

Ozempic is a prescription medication used for the treatment of type 2 diabetes as a supplement to diet and exercise. The active substance, semaglutide, contributes to improved blood sugar control and also has an appetite-suppressing effect, which can lead to weight loss.

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Wegovy is a prescription medication used for the treatment of obesity and overweight. 

It contains the active substance semaglutide and has shown significant effects on weight loss and cardiometabolic risk factors in clinical studies. By affecting the body's appetite regulation, this treatment can lead to an increased feeling of fullness and reduced energy intake.

Blood pressure shows the force of the blood as it is pumped out into the blood vessels. Both high and low blood pressure can affect your health negatively, but high blood pressure is of particular concern. If blood pressure remains elevated over a longer period, it increases the strain on the blood vessels, which raises the risk of cardiovascular disease.

Weight loss and healthy lifestyle habits — such as eating a nutritious, balanced diet, being regularly physically active and reducing alcohol intake — can often help lower blood pressure, but in some cases medication is also required.

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Semaglutide is an active pharmaceutical substance used for obesity and type 2 diabetes. Clinical studies have shown significant effects on both weight and metabolic risk factors. Interest in treatment with semaglutide has increased in line with documented results and a growing role in modern obesity care.

Many people who want to improve their health talk about “losing weight” – but what does that actually mean? Is the goal to weigh less, or to have less body fat? The difference is crucial for both health and results. To choose the right strategy, you need to understand the distinction between weight loss and fat loss. Even though they may sound like the same thing, they have different effects on our bodies and our health.

By Tristan Welch

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Crisp, colourful, and bursting with flavour, this Asian Noodle Salad with Shrimp is a refreshing mix of juicy shrimp, tender rice noodles, and crunchy vegetables. Tossed in a zesty sweet chilli and soy dressing with hints of sesame and lime, it’s fresh, satisfying, and full of energy—perfect for warm days, quick lunches, or light dinners that feel both nourishing and exciting.

By Tristan Welch

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Decadent, chewy, and naturally energizing, these Brownie Balls strike the perfect balance between indulgence and nutrition. Made with sweet dates, rich cocoa, and a boost of protein, they deliver brownie-like chocolate satisfaction without the guilt. Roasted buckwheat adds subtle crunch, while dark chocolate and sea salt make them truly irresistible—perfect as a snack, dessert, or pick-me-up.

By Tristan Welch

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Light, zesty, and full of sunshine, these Fish Tacos with Avocado & Mango Salsa celebrate fresh flavours and vibrant colours. Tender, spice-rubbed white fish pairs with creamy avocado and juicy mango for a perfect balance of heat, tang, and sweetness. Finished with a cool, garlicky quark sauce, they’re easy to make, beautiful to serve, and ideal for casual dinners or summer gatherings.