Why do we take blood samples and do a health screening?
Discover how Yazen uses blood tests and health screenings to uncover hidden barriers to weight loss and create safe, personalised treatment plans.

Why do we take blood samples and do a health screening?
At Yazen, we believe that true, sustainable health is about more than just numbers on a scale. Your weight, energy levels, and overall well-being are all influenced by internal factors that can’t always be seen or felt. That’s why we take blood samples and conduct a health screening—to get a comprehensive understanding of your health and personalise your journey in the best way possible.
Blood samples: what they tell us and why they matter
Your blood holds valuable insights into your metabolism, hormones, and overall health. By analysing your blood, we can measure key biomarkers that influence weight management and well-being. Please note: the exact markers checked may differ slightly between the full laboratory blood test and the home test kit.
What do we look for in blood tests?
🩸 Blood sugar levels – Understanding how your body processes sugar helps us assess insulin resistance, which plays a major role in weight regulation and energy balance.
🩸 Cholesterol and lipids – These indicators provide insight into your heart health and how your body handles fats. High cholesterol levels may signal an increased risk of cardiovascular disease.
🩸 Liver and kidney function – These organs are crucial for metabolism and detoxification. Checking their function ensures that any medications or dietary adjustments are safe for you.
🩸 Testosterone (men) – This key hormone affects metabolism, energy, and body composition. Low or imbalanced levels can make weight management more difficult and may influence mood and overall well-being.
By measuring these biomarkers, we can spot imbalances early and tailor your programme to your body’s specific needs. These insights also help us select the right medical treatment for you—ensuring it is safe, effective, and adapted to your health.
Health screening: why we do it and how it helps you
In addition to blood tests, we conduct a health screening to get a complete picture of your health. This involves reviewing:
✔️ Your medical history – Understanding any past or current health conditions ensures that any treatment or lifestyle adjustments are safe and effective for you.
✔️ Your weight, BMI, and body composition – Weight alone doesn’t tell the whole story. We look at muscle mass, fat distribution, and metabolic rate to create a more tailored approach.
✔️ Your lifestyle habits – Sleep, stress, physical activity, and diet all affect your health. A screening helps us understand what works for you and where we can provide support.
✔️ Potential risk factors – We assess whether you may be at risk for conditions like diabetes, cardiovascular disease, or metabolic syndrome, allowing us to prevent rather than just treat problems.
How does this benefit you?
Many weight loss programmes offer generic advice based on trial and error. At Yazen, we do things differently:
🔬 Science-based, personalised approach – Your results guide your plan, ensuring you get what your body actually needs.
⚖️ Better weight management – If something is blocking your progress (e.g., insulin resistance, a thyroid issue), we identify it early and adjust accordingly.
💪 More energy and well-being – By addressing vitamin deficiencies or inflammation, we help you feel stronger, healthier, and more energised.
🩺 Safe and medically informed guidance – Every recommendation we make is based on medical knowledge and expert support from doctors who specialise in obesity care.
💙 Emotional reassurance – If diets have failed you in the past, it’s not your fault. These tests take away the guesswork and give you clear answers about what your body actually needs.
📱 Ongoing support – All results feed directly into your personalised plan, which combines medical treatment, lifestyle support, and coaching, available to you anytime in the app.
The bottom line
Your health journey is unique, and understanding your body from the inside out is key to making lasting, meaningful changes. Blood samples and health screenings provide us with the insights needed to personalise your programme, support your health, and help you achieve sustainable results. With our specialist team and seamless digital support, you get safe, effective treatment—without the barriers of traditional care.
If you have any questions about your tests or results, your expert team is always there in the app to help.