Low testosterone in men
Understanding the link between hormones, energy, and weight
Low testosterone can affect energy, mood, motivation, and even your weight. Many men notice tiredness, low libido, or difficulty concentrating — but don’t realise hormones may be part of the reason. At Yazen, we look at the full picture: weight, hormones, and metabolic health — so you can get back to feeling like yourself.
Why testosterone matters
Testosterone influences more than muscle or sex drive. It supports bone strength, mood, focus, sleep, and metabolic balance.
When levels drop, energy, motivation, and confidence can follow.
Common signs include:
- Fatigue or low mood
- Reduced libido or erectile difficulties
- Increased belly fat and reduced muscle
- Poor sleep or “brain fog”
A simple blood test can identify whether low testosterone is part of the problem.
The connection between testosterone and weight
Obesity and low testosterone are closely linked. Excess visceral fat converts testosterone into oestrogen and increases inflammation — lowering testosterone further. That, in turn, makes weight loss harder, creating a frustrating cycle. Even modest weight loss can naturally raise testosterone and improve mood, energy, and sexual health.
Treatment and next steps
Low testosterone can often be improved through a combination of medical support and lifestyle change:
- Doctor-led assessment and blood tests
- Structured nutrition and training support
- Coaching to sustain healthy habits
- Medical treatment (when clinically appropriate)
Yazen’s doctor-led men’s programme combines hormone assessment, weight management, and ongoing support to restore balance and long-term health.
This is how you can start today
Sign up through our website
Answer a few questions within 2 minutes so we can better understand you and your goals. To submit your responses, securely log in using iDIN. This is a trusted online identification method that allows you to easily confirm your identity and age. Want to learn more about iDIN? Click here for more information.
Download the Yazen app
Continue your journey in our app. Download the Yazen app from the App Store or Google Play, and log in to get started right away.
Complete your health profile
Together with your YazenCoach, you'll answer a few more questions in the app to complete your profile.
Plan your blood test
To determine if you’re eligible for the treatment, we conduct a comprehensive blood test. We partner with Labplusarts, the leading provider of blood tests. You can easily request a blood test through their website, and you'll always find a location nearby.
*If the test results indicate that the treatment is unsuitable, you’ll receive a refund for the blood test cost (€119).
Discuss your treatment plan
If the blood test results show that the treatment is suitable for you, you’ll meet your doctor. Together, you’ll create a personalised treatment plan tailored to your needs.
Your journey can begin!
If you’re satisfied with the treatment plan, the costs, the medication, and the expected results, we can get started.
Yazen Health AB operates as a registered healthcare provider under the General Data Protection Regulation (GDPR), the Swedish Health and Medical Care Act, Patient Data Act, and the Patient Security Act. Our proprietary systems, including the patient app and electronic medical record (EMR) system, are officially registered with the Swedish Health and Social Care Inspectorate (IVO).