At 39, Leslie Kenny was diagnosed with rheumatoid arthritis and lupus and says she was told she had around five years to live. More than two decades later, she is in long-term remission and has turned that experience into a mission: helping patients become better informed, more involved and more confident in decisions about their own health.

In this episode, Leslie Kenny, founder of Oxford Healthspan and co-founder of the Oxford Longevity Project, joins Daphna Stern to tell the story of how she challenged her original prognosis, found intravenous immunoglobulin (IVIG) through her own research, changed her diet and ultimately reached remission.

But her story also raises a much bigger question: where should patient empowerment end and medical expertise begin?

The conversation then turns to spermidine, a naturally occurring compound found in the body and in foods that has attracted growing interest for its relationship with autophagy — the cellular recycling process that helps remove and reuse damaged cellular material. Leslie explains why she became convinced of its potential and why she believes natural compounds such as spermidine struggle to attract the research funding available to patentable drugs.

Daphna also pushes on the evidence. How much do we actually know about spermidine in humans? What can observational studies tell us — and what can they not? How does the evidence compare with interventions such as rapamycin? And when does an intriguing longevity molecule become something we can genuinely recommend?

The conversation expands beyond supplements into a broader discussion about personal responsibility for health, the exposome, the future of preventative medicine and what healthcare could look like if it focused not simply on extending life, but on helping people live well for longer — right through to the end.

Guest Bio

Leslie Kenny is the founder of Oxford Healthspan and co-founder of the Oxford Longevity Project. Diagnosed with rheumatoid arthritis and lupus at 39 and given a five-year prognosis, Kenny used patient research, dietary overhaul, and an experimental immunoglobulin therapy to reverse her condition into long-term remission. She trained at the Institute for Integrative Nutrition and now serves as Global Executive Ambassador for the Japan Autophagy Consortium. Through Oxford Healthspan, she develops food-derived spermidine and nettle-based nutraceuticals, and through the Oxford Longevity Project, she works alongside scientists including Sir Muir Gray, Sir Christopher Ball, Dr Paul Chen, and Emeritus Professor Dennis Noble to advance patient-centred ageing research.

LinkedIn: https://www.linkedin.com/in/leslie-kenny-oxford/

Timestamps

* 00:00 — Introduction to Leslie Kenny and her story

* 02:10 — IVF, autoimmune disease and the diagnosis that changed everything

* 04:30 — Questioning the original diagnosis and discovering a thyroid problem

* 08:15 — How patient research led Leslie to intravenous immunoglobulin (IVIG)

* 13:00 — Diet, elimination protocols and visualisation

* 17:40 — Reaching remission and turning personal experience into advocacy

* 21:50 — How to challenge your doctor without rejecting conventional medicine

* 25:30 — What spermidine is and why Leslie became interested in it

* 29:15 — Spermidine, the hallmarks of ageing and the comparison with rapamycin

* 34:00 — Why natural compounds can struggle for funding, patents and attention

* 38:20 — What the human evidence for spermidine actually tells us

* 43:10 — The funding problem in independent longevity research

* 45:30 — Oxford Healthspan and the Oxford Longevity Project

* 48:00 — How much control do we really have over our health and ageing?

* 52:00 — Rethinking hospitals, later life and what a good death looks like

* 56:30 — Rapid-fire questions

* 59:00 — Closing reflections

References & Further Reading

• Kenny, L. — founder, Oxford Healthspan
• Oxford Longevity Project (co-founded with Sir Muir Gray, Sir Christopher Ball, Dr. Paul Chen, Prof. Dennis Noble)
• Sears, B. — The Anti-Aging Zone
• Franceschi, C. — originator of the "inflammaging" concept
• Partridge, L., Madeo, F., Kennedy, B. — research on spermidine and the hallmarks of ageing
• Eisenberg, T., et al. — Grazer study on spermidine and human cell telomeres (2021)