This website has been developed by Besins Healthcare (UK) Ltd.

This website has separate sections for healthcare professionals (containing promotional information), and patients who have been prescribed Testogel® (testosterone) within the UK.

Please confirm that:

This website is provided for patients prescribed Testogel® in the UK by Besins Healthcare (UK) Ltd.


What is testosterone?

Testosterone is an important hormone that helps to maintain your physical and mental health. It is produced mostly in the testicles, but also by your adrenal glands (organs above the kidneys that produce hormones).

What is testosterone?

How testosterone affects the body.


Role of testosterone in the body

Testosterone has an important role to play in helping you to stay healthy:

Rollover man


  • Maintains healthy bones
  • Maintains strength and muscle mass
  • Influences fat distribution
  • Promotes red blood cell production
  • Supports collagen production for healthy skin and hair
  • Helps the heart pump effectively to promote blood flow

Sexual function1,2

  • Promotes libido/sex drive
  • Supports erectile function

Emotional and mental health3,4

  • Supports memory and concentration
  • Helps regulate mood/feelings


  • Supports insulin sensitivity (which can be an important factor in type 2 diabetes)


  1. National Institutes of Health. Understanding How Testosterone Affects Men. Published September 2013. Available at: Accessed July 2022.
  2. Harvard Health Publishing. Testosterone – What it Does and Doesn’t do. Published August 2019. Available at:–what-it-does-and-doesnt-do. Accessed July 2022.
  3. Sexual Advice Association. Testosterone Deficiency. Published February 2016. Available at: Accessed July 2022.
  4. Healthline. Could low testosterone be causing your brain fog? Available at: Accessed July 2022.
  5. WebMD. Low Testosterone and Your Health. Published February 2021. Available at: Accessed July 2022.

BHUK/2022/181. January 2023.

Reporting of side effects

If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in the package leaflet. You can also report side effects directly via the Yellow Card Scheme at: or search for MHRA Yellow Card in the Google Play or Apple App Store. By reporting side effects you can help provide more information on the safety of this medicine.