Healthy aging · Cell health · Radiance
Primeadine® Original Daily Whole-Food Spermidine
Award-winning, whole-food spermidine designed to support healthy aging, cellular health, and vitality. Made from concentrated, defatted wheat germ extract, sourced in Japan.
Gluten free? Gluten-free alternative here.
Concentrated, defatted wheat germ & sourced in Japan
Discover what makes Primeadine unique here.
Dual-country third party tested in Japan and the USA
View our certificates of analysis here.
"Lots of you ask about what I take and this is a key essential."
Description
Support healthy aging from within
Primeadine® Original is a premium, whole-food spermidine supplement made from concentrated, glyphosate-free wheat germ extract, 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.
How it may support you
Customers often report:
• More consistent daily energy
• Improved sleep quality
• Greater mental clarity
• Healthier-looking skin and hair
These are everyday indicators of a body being supported from within.
What’s happening underneath
As we age, the body’s natural cellular processes gradually become less efficient.
Primeadine provides a food-derived source of spermidine, a compound that has been studied for its role in supporting cellular maintenance processes, including autophagy — the body’s natural “clean-up” system.
This approach is not about forcing change, but supporting the body’s own systems over time.
Ingredients
Each serving provides 1mg of whole-food spermidine from concentrated, defatted wheat germ extract, sourced in Japan.
Defatting removes polyunsaturated fatty acids (PUFAs), helping to maintain stability and quality. When left in, they can go rancid and wreak havoc in your cells.
Other ingredients:
• Corn-derived cluster dextrin
• Hypromellose (vegan capsule)
• Sodium citrate
Allergens: Contains wheat (approx. 40mg gluten per serving — significantly less than a typical slice of bread).
Testing Results:
Certificate of analysis - toxins
Certificate of analysis - dose
Suggested use
Dosage:
3 capsules daily with water, taken with your first or last meal.
First-time use:
Day 1: 1 capsule
Day 2: 2 capsules
Day 3 onwards: 3 capsules daily (if well tolerated)
Consistency is recommended for best results.
Who's it for
Primeadine® Original is designed for those who want to:
- Support healthy aging proactively
- Maintain energy, clarity, and vitality
- Support skin and hair health from within
- Take a science-informed approach to long-term wellbeing
Important information
Not suitable for individuals with coeliac disease or gluten intolerance due to wheat content.
If unsure, consult your healthcare provider before use.
For a gluten-free alternative, see Primeadine® GF.
Free from
- Added fillers or unnecessary excipients
- Artificial flavors
- Soy, lactose, or sugar
- PUFAs (polyunsaturated fatty acids)
- Heavy metals, pesticides (including glyphosate), or other contaminants
Quality & testing
Primeadine Original Capsules Certification and Testing:
Laboratory: Delta Labs of South Florida, ISO/IEC 17025:2017 accredited, PJLA
Accreditation No. 114871
Product lot: T-507, exp 05/2028
Sample received: 14 August 2025
Report dated: 22 August 2025
Independently tested for purity: Primeadine Original Capsules (90 capsules), lot T-507, were tested by Delta Labs of South Florida under Amazon's third-party seller testing program.
Heavy metals: all results below the finished-product specification limits.
Microbiological safety: total aerobic plate count came in under 10 CFU per gram, against a limit of 10,000. Yeast and mold count came in under 10 CFU per gram, against a limit of 1,000. Salmonella, Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa all tested negative.
View the Primeadine Original Capsules Certificate of Analysis
Due to the natural origin of ingredients and absence of fillers, slight variations in color and density may occur between batches.
Results timeline
When to expect results
Most customers report more meaningful changes after 3 to 6 months. 90 days is the honest minimum we recommend.
- 01
Month 1
The work starts from day one, quietly, at a cellular level. - 02
Months 2 to 3
Some customers notice subtle shifts in sleep or energy. Many notice nothing yet. - 03
Months 3 to 4
Most begin to notice change: sleep, hair, skin and energy most often. - 04
Month 5 onwards
Benefits build with consistent use.
Compare
How Primeadine Original compares
| Feature | Primeadine Original | Synthetic spermidine |
|---|---|---|
| Source | Concentrated, defatted Japanese wheat germ | Spermidine trihydrochloride, made in a lab |
| Polyamines | Spermidine, spermine, putrescine | Spermidine only |
| Testing | Every batch, in Japan and the USA | Varies by brand |
As seen in
Why it matters
Your cells slow their clean-up as you age
Spermidine is found in every living cell. Your body makes plenty when you're young, and levels decline with age. Less spermidine means less autophagy, the process your cells use to clear out and recycle worn-out parts.
Primeadine replenishes spermidine from food, to support your body's own renewal. It's designed for people who want to:
Primeadine® Original is designed for those who want to:
- Support healthy aging proactively
- Maintain energy, clarity, and vitality
- Support skin and hair health from within
- Take a science-informed approach to long-term wellbeing
This is not aging interrupted. This is aging activated.
Leslie Kenny, Founder and CEO, Oxford Healthspan
Customer stories
What customers notice
"I get many compliments on my glowing skin and shiny hair."
My sleeping pattern has improved. I feel more rested when I wake and my hair is growing faster. I'm 62 but get mistaken for looking younger than I am.
"This makes a difference."
After 3 months I feel and look more refreshed. I also seem to have more energy now in my 50's after 3 months on this product.
"I believe that my skin and hair looks better."
I have been taking Primeadine for about 90 days. I will continue to use the product to see even better results.
Video reviews
Hear it from them
The science
Spermidine, explained
Autophagy was shown to be a regulated process by Japanese scientist Yoshinori Ohsumi, whose work won the 2016 Nobel Prize in Physiology or Medicine.
Dive into the scienceWhat is spermidine?
A naturally occurring polyamine found in every living cell. It supports the body's natural cellular maintenance processes, including autophagy. Your body makes spermidine, but levels tend to decline with age.
What is autophagy?
From the Greek for "self-eating". Your cells identify, break down and recycle damaged components. It's one of the body's main renewal processes, and its role in healthy aging is well established.
Food-derived or synthetic: does it matter?
Food-derived spermidine comes in a whole-food matrix alongside related compounds that are part of the body's polyamine system. Synthetic spermidine is made in isolation, and research into its long-term use in humans is still limited.
What does the research suggest?
Spermidine has been studied for its role in cellular renewal, cognitive and cardiovascular health, hair, skin and nails, energy and sleep. Individual experiences vary.
Ingredients
One whole-food ingredient doing the work
Each serving provides 1mg of whole-food spermidine from concentrated, defatted wheat germ extract, sourced in Japan.
Defatting removes polyunsaturated fatty acids (PUFAs), helping to maintain stability and quality. When left in, they can go rancid and wreak havoc in your cells.
Other ingredients:
• Corn-derived cluster dextrin
• Hypromellose (vegan capsule)
• Sodium citrate
Allergens: Contains wheat (approx. 40mg gluten per serving — significantly less than a typical slice of bread).
- Added fillers or unnecessary excipients
- Artificial flavors
- Soy, lactose, or sugar
- PUFAs (polyunsaturated fatty acids)
- Heavy metals, pesticides (including glyphosate), or other contaminants
Why Oxford Healthspan
How we make Primeadine
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. Every batch of Primeadine is independently tested in Japan and the USA for heavy metals and microbiological safety.
Tested in two countries
Batches are independently tested in Japan and the USA.
Sourced in Japan
Japan has some of the strictest food quality and safety standards in the world.
Food-derived
Spermidine never occurs alone in nature. Primeadine Original keeps its companions, spermine and putrescine.
Linked to Nobel-winning research
We're the only non-Japanese company collaborating with Yoshinori Ohsumi and his team.
Our advisers
Guided by scientists and clinicians
Our international network of advisers spans physiology, immunology, longevity science and clinical nutrition. Many are affiliated with the University of Oxford.
Amy Lamotte
Clinical nutritionist specializing in personalised nutrition and immune health.
Prof Denis Noble
University of Oxford. Emeritus Professor of Physiology and pioneer in systems biology.
Dr Ghada Alsaleh
University of Oxford. Researcher in immunology and autophagy, focused on aging and immune function.
Dr Katja Simon
Max Delbrück Center, Berlin. Leads research into autophagy in the immune system.
Dr Paul Ch'en
University of Oxford college GP and co-founder of the Oxford Longevity Project.
Dr Sandra Kaufmann
Longevity doctor and researcher with a background in cellular biology and aging.
Your routine
Three capsules, once a day
Dosage:
3 capsules daily with water, taken with your first or last meal.
First-time use:
Day 1: 1 capsule
Day 2: 2 capsules
Day 3 onwards: 3 capsules daily (if well tolerated)
Consistency is recommended for best results.
From our founder
Meet Leslie Kenny
Leslie Kenny is a Harvard-educated entrepreneur and Oxford-based longevity expert. Oxford Healthspan began with her own health crisis, and the science that answered it.
Practitioners and biohackers
Recommended by people who study aging
"The best spermidine supplement on the market."
"It's a staple in my supplement stack!"
"Primeadine is an exceptional quality spermidine that I use in many protocols."
"There is no question that spermidine is a crucial component to any longevity program."
"Primeadine by Oxford Healthspan is my go-to spermidine supplement."
Customers often report
What daily Primeadine supports
FAQ
Questions, answered
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 is autophagy?
Autophagy, from the Greek meaning "self-eating," is the process by which your cells identify, break down, and recycle damaged components. It is one of the body's most elegant and powerful renewal mechanisms, and its role in healthy aging is now firmly established in science.
The discovery of autophagy as a regulated biological process was made by Japanese scientist Yoshinori Ohsumi, whose work earned him the Nobel Prize in Physiology or Medicine in 2016.
Oxford Healthspan is proud to be the only non-Japanese company collaborating with Ohsumi and his team, bringing that pioneering research to the heart of everything we make.
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 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 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's 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.
What's the difference between Primeadine Original and GF?
Both formulas deliver whole-food spermidine sourced in Japan. They differ in source, dose and what our community mentions most.
Primeadine Original comes from defatted Japanese wheat germ and provides 1mg of spermidine per 3-capsule serving. Customers most often mention hair, skin and nails. It contains a trace of gluten (40mg), so it isn't suitable for anyone with celiac disease or gluten intolerance.
Primeadine GF comes from Okinawan chlorella, with lime peel and turmeric, and provides 1.2mg per 4-tablet serving. It's fully gluten-free, and customers most often mention sleep. It contains iron and vitamin K2, so it isn't suitable for anyone with hemochromatosis or taking blood-thinning medication.
Take either at your first or last meal of the day. If you're unsure, choose based on dietary needs first, then the benefit that matters most to you.
Reviews
What customers say
- CMSVerified ReviewerAge Range 65+Gender FemaleWellness Concern Hair loss, Sleep, Energy levels, Cognition, Aging wellThe Pros Easy to use, Clean ingredients, Science behind the product, Positive results2 months agoAge Range 65+Gender FemaleWellness Concern Hair loss, Sleep, Energy levels, Cognition, Aging wellThe Pros Easy to use, Clean ingredients, Science behind the product, Positive resultsReviewingPrimeadine® Original Whole-Food Spermidine Supplement - 1 Bottle / 30 Day SupplyRated 4 out of 5 starsBetter sleep-more consistent energy
After first 60 days on Primeadine, I can attest to better, deeper sleep and a more consistent level of energy throughout the day for a senior adult. Memory and recall seems improved some too. Looking forward to hair-skin-nails improvements. Would prefer less than 3 pills to take, but so far not had any problems digesting them or having bad side effects. I take them every morning.
- Jeff R.Verified ReviewerAge Range 65+Gender MaleWellness Concern Sleep, Energy levels, Cognition, Aging well, Overall HealthThe Pros Easy to use, Clean ingredients, Speed of action, Science behind the product, Positive results2 months agoAge Range 65+Gender MaleWellness Concern Sleep, Energy levels, Cognition, Aging well, Overall HealthThe Pros Easy to use, Clean ingredients, Speed of action, Science behind the product, Positive resultsReviewingPrimeadine® Original Whole-Food Spermidine Supplement - 1 Bottle / 30 Day SupplyRated 5 out of 5 starsLife Affirming Addition
I’ve just recently begun my fifth month on Primeadine Original and after about one to one and a half months, I have noticed that I have a lot more energy and I’m sleeping much better.
I wake up refreshed and energized every morning and don’t need to take naps during the afternoon much at all anymore, and I’m 75, but feel more like 35 now.(That’s right, 75 is the new 35😊)
And I would have to say that my skin and hair do seem healthier after over four months on the original formula.
I always look forward to taking my Primeadine every morning because I know it’s leading me down the right path based on how good I feel now.
And I have also noticed that my cognition seems to be greatly improved.
I would also note that Leslie Kay from Oxford Healthspan has always been very helpful and joy to speak with.
- MBVerified BuyerAge Range 65+Gender FemaleWellness Concern Aging well, CognitionThe Pros Easy to use, Science behind the product, Positive results2 months agoAge Range 65+Gender FemaleWellness Concern Aging well, CognitionThe Pros Easy to use, Science behind the product, Positive resultsReviewingPrimeadine® Original Whole-Food Spermidine Supplement - 1 Bottle / 30 Day SupplyRated 5 out of 5 starsDecidedly one of my basics since January 2022
In writing this review I am aware of how many various food supplements I have taken over my lifetime and how over the last few years how many I have actually eliminated from my daily regime; Primeadine though, is certainly not one of them. I am sincerely grateful for the quality of the product and the exceptional customer service. Can I say exactly what benefits I have experienced over the last four and a half years since starting with the product? I am a 74-year-old female, still regularly hiking up mountains, sleeping well, with very few aches or pains, continuing to wake up each day with clarity of mind, and deep gratitude for a wondrously consistent sense of vitality and enthusiasm for life. I would be very hard pressed to stop taking Primeadine as one of my essential dietary foundations.
- Kaye"Verified BuyerAge Range 45 - 54Gender FemaleWellness Concern Hair loss, Skin Health, Cognition, Overall Health, Aging well3 months agoAge Range 45 - 54Gender FemaleWellness Concern Hair loss, Skin Health, Cognition, Overall Health, Aging wellReviewingPrimeadine® Original Whole-Food Spermidine Supplement - 1 Bottle / 30 Day SupplyRated 5 out of 5 starsLove Primeadine
I have been taking Primeadine for about 90 days. I believe that my skin and hair looks better. I will continue to use the product to see even better results. Thank you, Leslie!
- Marion F.Verified ReviewerAge Range 65+Gender FemaleWellness Concern Sleep, Aging wellThe Pros Easy to use, Clean ingredients, Positive results3 months agoAge Range 65+Gender FemaleWellness Concern Sleep, Aging wellThe Pros Easy to use, Clean ingredients, Positive resultsReviewingPrimeadine® Original Whole-Food Spermidine Supplement - 1 Bottle / 30 Day SupplyRated 4 out of 5 starsSleep
Even though my overall sleep hasn't improved, I do notice that my body is more relaxed than it used to be.
