About Oxford Healthspan
We are a female-founded healthy aging brand, grounded in quality, Oxford-led science, and the power of natural, whole-food ingredients to support the body's innate wisdom to renew itself.
Meet Our Founder & CEO, Leslie Kenny
Explore how Primeadine worksMeet Our Founder & CEO, Leslie Kenny
In her 30s, Leslie Kenny was diagnosed with multiple autoimmune conditions and was told her future would be limited. She chose to take a different approach.
Through changes to her nutrition and lifestyle, and a growing interest in cellular health, Leslie focused on supporting her body over time. Today, she shares her experience as part of her work in longevity and healthy aging.
This personal journey led her to collaborate with scientists, including researchers affiliated with the University of Oxford, to better understand how we age and how to support the body’s natural processes.
Oxford Healthspan was founded from this work, with the aim of making carefully developed, science-led, food-derived supplements more widely accessible.
Why spermidine?
Spermidine is a naturally occurring compound found in all living cells and in small amounts in certain foods.
Leslie was introduced to it through her work with Professor Katja Simon at the University of Oxford. At the time, it was largely confined to research settings, in part because it is a naturally occurring molecule rather than a pharmaceutical compound.
It has since been studied for its association with the body’s natural cellular renewal processes, including autophagy.
This area of research became a key focus for Oxford Healthspan.
What is Primeadine®
Primeadine is a whole-food spermidine formulation, designed to support cellular health, longevity and overall wellbeing over time.
It reflects a simple philosophy:
- Work with the body’s natural processes
- Prioritize quality and consistency
- Focus on long-term support, not short-term outcomes
Each batch is carefully sourced and independently tested for purity and quality.
Today, Primeadine is used by customers worldwide as part of their daily approach to healthy aging.
Scientific & Clinical Advisory
Our work is guided by an international network of scientific and clinical advisors, many of which are affiliated with the University of Oxford, across physiology, immunology, longevity science, and clinical nutrition.
This ensures our approach remains grounded in the latest research and scientific integrity, not hype and trends.
Professor Denis Noble (University of Oxford)
Emeritus Professor of Physiology and pioneer in systems biology. Co-founder of the Oxford Longevity Project.
Dr. Ghada Alsaleh (University of Oxford)
Researcher in immunology and autophagy that leads the UK's first space innovation lab, with a focus on aging and immune function.
Dr. Katja Simon (Max Delbrück Center, Berlin)
Leads research into autophagy in the immune system, including its role in cellular maintenance.
Dr. Sasi Senga (University of Oxford)
Neurosurgical oncologist and researcher focused on cancer biology.
Dr. Olivia Lesslar (Global)
Celebrity longevity doctor specializing in complex chronic conditions and integrative approaches to health. Featured in NYC Journal's 50 under 50.
Dr. Sandra Kaufmann (Miami)
"Best in medicine" longevity doctor and researcher with a background in cellular biology and aging.
Dr. Paul Ch'en (University of Oxford)
University of Oxford college GP and co-founder of the Oxford Longevity Project, with interests in preventative and holistic care for cancer.
Amy Lamotte (Hong Kong)
Clinical nutritionist specializing in personalised nutrition and immune health.
Our approach
We believe aging well should feel clear, grounded, and achievable.
That means:
- Science that is thoughtfully applied
- Whole-food Ingredients selected with care
- A focus on consistency over time
A considered approach, designed to support your health as part of a balanced lifestyle.