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Cellular renewal, deeper sleep, sustained energy, and skin that reflects how well you're living. This is what aging well feels like.
Primeadine® Original is a premium, whole-food spermidine supplement made from concentrated, defatted wheat germ, carefully sourced in Japan.
It is designed to support the body’s natural cellular maintenance processes, which play an important role in how we age, feel, and function over time.
A gluten-free, food-derived spermidine supplement sourced from Okinawa, Japan.
Formulated to support your body’s natural cellular renewal processes, helping maintain vitality, radiance, and overall wellbeing over time.
Primeadine® Original Powder is a premium, whole-food spermidine powder made from concentrated, defatted wheat germ, carefully sourced in Japan.
It is designed to support the body’s natural cellular maintenance processes, which play an important role in how we age, feel, and function over time.
High quality & standards
Primeadine® undergoes rigorous third party testing, both in the Japan (which has the strictest food quality and safety standards in the world) and in the USA. It is free from heavy metals, mycotoxins, pesticides, and herbicides.







Our Founder & CEO, Leslie Kenny
For Leslie Kenny, a Harvard-educated entrepreneur and Oxford-based longevity expert, Oxford Healthspan is not a commercial venture. It is a mission that began with a personal crisis and was answered by science.
Diagnosed with autoimmune conditions in her late 30s and told she could not conceive naturally, Leslie reversed her symptoms through immune modulation and lifestyle changes, and conceived naturally at age 43. That experience became the blueprint for everything Oxford Healthspan stands for: the radical belief that the body, given the right conditions, is capable of extraordinary things.
"Aging well should feel empowering. Primeadine is designed to support a new prime of life."
A compound your body already knows
What is spermidine?
Spermidine is a naturally-occurring molecule found in every living cell. Your body produces it abundantly when you're younger, but levels decline with age, reducing your ability to activate autophagy, your cells' natural renewal and repair process.
Replenishing it through carefully sourced, food-derived supplementation supports the body's natural resilience and vitality over time.
This is not aging interrupted. This is aging activated.
See why our customers choose us
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Have any questions?
Our Oxford-based customer support team is available Monday to Friday.
Email support@oxfordhealthspan.com or call +1-469-465-8886.
What is spermidine?
Spermidine is a naturally occurring compound known as a polyamine, found in every living cell. It plays a role in supporting the body’s natural cellular maintenance processes, including autophagy, which helps cells renew and function optimally.
While the body can produce spermidine, levels tend to decline with age.
What are the benefits of spermidine?
Spermidine has been studied for its role in supporting cellular health and healthy aging. Research suggests it may contribute to:
- Cellular renewal processes such as autophagy
- Cognitive and cardiovascular health
- Hair, skin, and nail health
- Energy, sleep quality, and overall wellbeing
Many of these effects are linked to its role in supporting the body’s natural maintenance pathways.
Individual experiences vary, but customers often report improvements in energy, sleep, and visible signs of vitality over time.
What's the difference between food-derived and synthetic spermidine?
The key difference lies in how spermidine is delivered and how the body may utilise it.
Food-derived spermidine
Occurs naturally within a whole-food matrix alongside related compounds, including other polyamines such as spermine and putrescine. These naturally co-occurring compounds are part of the body’s polyamine system and may support how spermidine is processed and utilised.
Synthetic spermidine
Is produced in isolation and does not come with this natural matrix. Research into long-term use in humans is still limited compared to food-derived sources.
Why this matters
In whole foods, nutrients exist within a complex structure that can influence absorption and biological activity. Food-derived spermidine reflects this natural context.
What makes Primeadine® superior to other spermidine supplements?
Primeadine® is built around quality, simplicity, and scientific integrity.
- Food-derived spermidine, not synthetically enriched
- Developed alongside scientific advisors, including researchers connected to Oxford
- Third-party tested for purity and potency in both Japan and the USA
- Ingredients sourced from Japan, known for rigorous quality standards
- Free from unnecessary fillers, flow agents, and additives
- Carefully tested for contaminants such as heavy metals and pesticides
Each batch is produced to ensure consistency, purity, and quality.
What is the best spermidine dose to take?
One serving provides 1 mg of food-derived spermidine, consistent with levels used in scientific research.
Individual needs vary. If unsure, consult your healthcare provider before adjusting your intake.
How long does it take to notice results?
Primeadine® works by supporting natural cellular processes, which take time.
While activity begins at a cellular level from the outset, many customers report noticing more meaningful changes after 3 to 6 months of consistent use.
Benefits tend to build gradually with daily use.
Dive deeper on our blog

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