Prof Channa Jayasena

Who Prof Channa Jayasena is

Professor Channa Jayasena is a Full Professor and Principal Investigator at Imperial College London, and a Consultant in Reproductive Endocrinology and Andrology at St Mary's and Hammersmith Hospitals. He is also Head of Andrology for North-West London Pathology Services and leads the Society for Endocrinology's Specialist Endocrinology Network for Andrology. He qualified in medicine at Cambridge University, trained in diabetes and endocrinology in London, and conducted research at Imperial as a Wellcome Trust Clinical Research Training Fellow and subsequently NIHR Clinical Lecturer. In 2018 he was awarded an NIHR Post-Doctoral Fellowship investigating the metabolic regulation of male infertility, and he was Chief Investigator of the NIHR Health Technology Assessment-funded TestES Consortium examining the efficacy and safety of testosterone replacement in men. He is regularly quoted in the UK press on topics including declining sperm counts, anabolic-steroid misuse, testosterone therapy, and male and female infertility.

References for this biography

1. 1.Reproductive Endocrinology – Faculty of Medicine, Imperial College London — Establishes his role as Principal Investigator at Imperial College London, Consultant at St Mary's and Hammersmith Hospitals, Head of Andrology for North-West London Pathology Services, and NIHR Post-Doctoral Fellowship (2018).
2. 2.Dr Channa Jayasena – Imperial College Healthcare NHS Trust Consultant Directory — Confirms consultant role, Cambridge medical qualification, Wellcome Trust fellowship, NIHR Clinical Lectureship, and 2014 Society for Endocrinology Young Endocrinologist Prize.
3. 3.Dr Channa Jayasena – Society for Endocrinology Founding Group — Confirms NIHR HTA TestES Consortium chief investigatorship and leadership of the SfE Specialist Endocrinology Network for Andrology.
4. 4.Society for endocrinology guideline for understanding, diagnosing and treating female hypogonadism – Clinical Endocrinology (Wiley) — Establishes Jayasena as lead author of the 2024 Society for Endocrinology female hypogonadism guideline published in Clinical Endocrinology.
5. 5.Channa Jayasena – Google Scholar — Confirms Full Professor title at Imperial College London and citation count of 8,896 in reproductive endocrinology and andrology.
6. 6.Ice on testicles and donating blood – the myths sold to men trying to boost their sperm (BBC/Yahoo News, July 2026) — Evidences recent UK press quotation of Jayasena on dangers of unmedicated fertility drug use and declining sperm count claims on social media.

Notable achievements

• Awarded the 2014 Young Endocrinologist Prize Lecture by the UK's Society for Endocrinology, described as the highest honour given to a trainee clinician by the society. Source ↗
• Awarded an NIHR Post-Doctoral Fellowship in 2018 to investigate the metabolic regulation of male infertility. Source ↗
• Chief Investigator on an NIHR Health Technology Assessment-funded project (TestES Consortium) to investigate the efficacy and safety of testosterone replacement in men. Source ↗
• Led the Society for Endocrinology's 2024 clinical guideline for understanding, diagnosing and treating female hypogonadism, published in Clinical Endocrinology. Source ↗
• Named lead of the Society for Endocrinology Specialist Endocrinology Network for Andrology. Source ↗

What Prof Channa Jayasena has said

• “Testosterone should only be given to men whose levels are insufficient. In this scenario, it's incredibly safe. It does not cause aggression. In fact, it can improve people's mood and their quality of life.”

  professor of reproductive endocrinology at Imperial College London and a consultant in the NHS and private sector · Women's health & gynaecology · 30 Sept 2026 · Hormones on the brain? Everything you need to know about HRT, testosterone, melatonin and more ↗

• “The effect of HRT on brain health in menopause continues to be a topic of debate, and old clinical trials like the Women's Health Initiative have failed to answer this question. Either way, this is an important complication that millions of women experience in the UK, so deserves close attention in the future.”

  An expert in hormones and from Imperial College London · Women's health & gynaecology · 30 Sept 2026 · Menopause linked to Alzheimer's-like brain changes ↗

• “It contains your natural oestrogen, which doesn't confer that same blood clot risk. These are really good modern, next-generation contraceptive pills, which have a safety advantage and could be much more suitable for women in their 40s in particular, or even their 50s.”

  expert in reproductive endocrinology at Imperial College London · Women's health & gynaecology · 29 Sept 2026 · Key facts to counter online misinformation about perimenopause ↗

• “It's great that there's better [public] awareness [about perimenopause]. And I think many doctors are completely unaware about how debilitating the symptoms of perimenopause can be. But the flipside of that, I think there's a risk that some women are being mislabelled as having perimenopause when they have other things that are wrong.”

  expert in reproductive endocrinology at Imperial College London · Women's health & gynaecology · 29 Sept 2026 · Misinformation about perimenopause on social media ‘putting women at risk’ ↗

• “They found that menopause was associated with reduction in the development of some brain areas, which highlights the need to investigate whether anything can be done to predict or treat this.”

  Professor of reproductive endocrinology and andrology at Imperial College London · Maternity & neonatal · 10 Sept 2026 · Menopause linked to reduced grey matter in the brain, finds large UK study ↗

• “At the national meeting, we asked 300 endocrinologists across the UK; everyone is seeing patients from these clinics every week. They are filling our clinics. We used to see people with adrenal problems and diabetes, and it's really affecting NHS care.”

  Professor at Imperial College London, chair of the Society for Endocrinology Andrology Network · Hospital discharge / bed-blocking · 27 Aug 2026 · Social media misinformation driving men to seek unneeded NHS testosterone therapy, doctors say ↗

• “I think it's a tremendous initiative, and I think it's a great step forward in trying to help women and clinicians understand the full breadth of the seriousness [of the] condition.”

  Expert in reproductive endocrinology at Imperial College London · Hospital discharge / bed-blocking · 27 Aug 2026 · NHS urged to update website after renaming of polycystic ovary syndrome ↗

Where Prof Channa Jayasena has been quoted

1. Health news round-up: 'landmark' long COVID trial results and are contraceptives linked to brain tumours?pharmaceutical-journal.com · 30 Sept 2026
2. Hormones on the brain? Everything you need to know about HRT, testosterone, melatonin and moretheguardian.com · 30 Sept 2026
3. Menopause linked to Alzheimer's-like brain changesbbc.com · 30 Sept 2026
4. Key facts to counter online misinformation about perimenopausetheguardian.com · 29 Sept 2026
5. Misinformation about perimenopause on social media ‘putting women at risk’theguardian.com · 29 Sept 2026
6. Menopause linked to reduced grey matter in the brain, finds large UK studypulsetoday.co.uk · 10 Sept 2026
7. Social media misinformation driving men to seek unneeded NHS testosterone therapy, doctors saytheguardian.com · 27 Aug 2026
8. NHS urged to update website after renaming of polycystic ovary syndrometheguardian.com · 27 Aug 2026

Related media coverage

Recent UK press coverage of their topics — not necessarily citing them directly.

• Lung and Mouth Bacteria Linked to Long COVID Severity and SymptomsInside Precision Medicine
• Very severe long COVID linked to differences in lung and mouth microbiomesMedical Xpress
• Dutch government allowed to halt controversial Long Covid treatment, court rulesNL Times

Contact & links

• Staff pagehttps://www.imperial.nhs.uk/consultant-directory/channa-jayasena
• Staff pagehttps://www.imperial.ac.uk/medicine/departments/metabolism-digestion-reproduction/research/diabetes-endocrinology-metabolism/endocrinology-and-investigative-medicine/reproductive-endocrinology/
• LinkedInhttps://uk.linkedin.com/in/channa-jayasena-78abb140
• ORCIDhttps://scholar.google.com/citations?user=u58pLJgAAAAJpublished here ↗

Organisational contact points only, each taken from a page the organisation publishes itself. No personal or direct contact details are held or shown.