5 Best Spermidine Supplements For Longevity

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Best Spermidine Supplement - Spermidine Life vs Primeadine
Key Takeaways:

Spermidine is an essential longevity-promoting nutrient present in your body.

Supplementing with spermidine offers benefits akin to fasting.

The benefits of supplementing with spermidine are backed by many scientific studies.  

Primeadine and Spermidine Life are the most highly effective spermidine supplements on the market today.

Please Note: When you purchase through links on our site, we may earn an affiliate commission. Here's how it works.

5 Best Spermidine Supplements For Longevity

Hey there!

Welcome to my review of the best spermidine supplements of September 2023!

You’re probably aware that spermidine has become a significant player in the anti-aging space over the last few years, which is why I was so excited to learn more about it.

To find the best Spermidine supplement I spent over 30 hours researching and testing products while interviewing some of the smartest folks in the field.

After all this work I narrowed my search down to the 5 best spermidine supplements that I believe deliver the results you’re looking for.

The following article is a deep dive into how spermidine works, its benefits, how to properly use it, and some brief reviews on the best spermidine supplements out there today.

So if you’re ready to learn more about one of the hottest anti-aging supplements on the market in September 2023, let’s jump into it!

Best Spermidine Supplements in September 2023 -Quick List-

Spermidine Life #1

Spermidine Life

The Best Spermidine Available Today
Learn MoreUse code ERIK15 for 15% discount
Primeadine Spermidine #2

Primeadine Spermidine

High-Quality, Safe, Lab-Tested Spermidine
Learn MoreSave 10% w. code HOLISTICNOOTROPICS
Lipo Spermidine #3

Lipo Spermidine

Liposomal Spermidine
Doublewood Spermidine #4

Doublewood Spermidine

Best Value Spermidine
Spermidine by Limitless Life Nootropics #5

Spermidine by Limitless Life Nootropics

Research-Chemical Spermidine

What Is Spermidine?

Best Spermidine Supplement - Spermidine Life vs Primeadine

Spermidine is a polyamine compound with many important metabolic functions in our bodies. It was first isolated from semen (hence the name), but spermidine is found in many different organisms, from bacteria to humans.

Recent epidemiological data suggests declining spermidine levels are tied to rises in age-related deterioration.1Frank Madeo, Maria A. Bauer, Didac Carmona-Gutierrez, and Guido Kroemer, Spermidine: a physiological autophagy inducer acting as an anti-aging vitamin in humans? Autophagy. 2019

This is most likely due to the many health-maintaining tasks spermidine is responsible for in the body.

Such tasks include cell growth and proliferation, tissue regeneration, DNA and RNA stabilization, enzymatic modulation, and regulation of translation.

It also exhibits anti-inflammatory and antioxidant properties, enhances mitochondrial metabolic function and respiration, promotes chaperone activity and improves proteostasis.2S Bardócz , T J Duguid, D S Brown, G Grant, A Pusztai, A White, A Ralph, The importance of dietary polyamines in cell regeneration and growth Br J Nutr. 19953Kazuei Igarashi , Keiko Kashiwagi, Modulation of cellular function by polyamines Int J Biochem Cell Biol. 20104Anthony E Pegg, Functions of Polyamines in Mammals J Biol Chem. 2016

Besides the important effects it has on longevity in mammals, spermidine also helps to regulate growth in plants.

Reviews Of The Best Spermidine Supplements

The Best Spermidine Available Today

Spermidine Life

Spermidine Life
Check PriceUse code ERIK15 for 15% discount
Check PriceUse code ERIK15 for 15% discount
  • Highest-quality Spermidine on the market today

  • Spermidine is one of the top anti-aging products that enhances autophagy with little-to-no known side effects

  • Spermidine sourced from Non-GMO wheat

  • Extracted via natural, pure-water process without harmful chemicals and solvents

  • Spermidine Life staff includes top longevity and health experts from around the world.

Spermidine is a revolutionary product from Longevity Labs developed to help promote cellular health and longevity.

Spermidine Life not only focuses solely on producing the highest-quality Spermidine, but also offers Spermidine blends designed to enhance brain health and immunity.

Spermidine is a polyamine found in almost every cell in the body, and Spermidine Life activates the cell’s autophagy process, allowing your cells to regenerate and repair themselves. This means it helps reduce oxidative stress, which can damage cells over time, leading to premature aging. Additionally, spermidine helps improve mitochondrial function, which is essential for cell energy production.

Spermidine Life supplements are made from 100% natural ingredients derived from plants such as Non-GMO wheat germ extract, which contains high spermidine levels. Extraction is done with pure water, and does not include aggressive solvents or chemical drying.

I have recently interviewed Don Moxley, the Director of Applied Science and Brand Development at Longevity Labs all about the benefits of Spermidine.

High-Quality, Safe, Lab-Tested Spermidine

Primeadine Spermidine

Primeadine Spermidine
Check PriceSave 10% w. code HOLISTICNOOTROPICS
Check PriceSave 10% w. code HOLISTICNOOTROPICS
  • Special formula boosts both exogenous and endogenous Spermidine production ==> More bioavailable spermidine

  • Oxford Healthspan adheres to the highest lab testing, Spermidine quality standards

  • Potent autophagy, longevity booster

  • Created by scientists from Oxford University, one of the premier medical schools in the world

In the fast-growing market of anti-aging products, Primeadine Spermidine is quickly making its name as one of the top Spermidine sources in the world.

Primeadine was designed and produced by some of the top medical minds from Oxford University who have created the collective Oxford Health Span, whose mission is to identify anti-aging compounds with strong clinical safety profiles and bring them to market as nutritional supplements. Spermidine is the first of those compounds.

The formula contains a special type of maltodextrin (FOS) that acts as a prebiotic fiber and resistant starch that will selectively feed the fuso- and bactericides bacteria in the gut biome to boost exogenous spermidine as well as your own body’s ability to produce endogenous spermidine.

In terms of quality, Primeadine’s Spermidine is as pure as you will find.  It contains no artificial fillers like Talc and Shellac, which boost the physical presentation of most commercial supplements.

This means you get more pure Spermidine per dose and less possible chemical interactions in your body.

Primeadine production undergoes rigorous 3rd party lab testing in an FDA-approved cGMP facility and follows Japan Health Food and Nutrition Association (JHFA) guidelines which are known to be some of the strictest in the world.

This means every order of Primeadine Spermidine delivers the highest Spermidine benefits including autophagy and peak cellular health.

Liposomal Spermidine

Lipo Spermidine

  • Spermidine encapsulated in a sustained-released liposomal delivery system that provides superior absorption

  • Enhances autophagy for better cellular health

  • More bioavailable Spermidine = Increased NAD+ and Longevity benefits

  • Only Spermidine that comes in a liposome

Lipo Spermidine from Renue By Science is a revolutionary form of Spermidine that is encapsulated in a liposomal delivery system for enhanced bioavailability.

Liposomal delivery is an advanced method of supplement delivery that ensures the active ingredients are delivered directly to the body’s cells. When supplements are taken orally, they must pass through the digestive system, where most of the active ingredients can be destroyed or lost. But with liposomal delivery, the active ingredients are encapsulated in a protective lipid layer, allowing them to bypass digestion and enter directly into the bloodstream. This means that more of the active ingredients will actually reach their target destination, resulting in greater bioavailability and improved results.

Renue By Science is a highly reputable supplement company in the Anti-Aging space that focuses on high quality longevity supplements.   They are known for having some of the most rigorous 3rd party testing in the supplement industry and post all test results of the raw materials of their products.

Best Value Spermidine

Doublewood Spermidine

  • Doublewood is a highly reputable supplement company

  • Each bottle of Spermidine includes a certificate of analysis from 3rd party testing.

  • Best value spermidine for saving money

Spermidine from Doublewood supplements is a great option for those who want to try Spermidine without spending too much money.

Doublewood is a highly reputable company that makes great products and provides certificate of analyses of 3rd party testing results.

Their Spermidine is effective in so much as it contains what it says it is and should enhance autophagy and cellular health.

They don’t have the scientific staff that other spermidine brands do and their methods of design are unknown which is why they are not in my top 3 Spermidines.

Research-Chemical Spermidine

Spermidine by Limitless Life Nootropics

  • Only Spermidine in liquid tincture

  • Marketed as a pure research chemical

  • Highly bioavailable in liquid HCL form

  • Each bottle includes a certificate of analysis from 3rd party testing using liquid chromatography ensuring purity

Limitless Life Nootropics is a fairly new player in the nootropics and supplement space.

Their products, including Spermidine HCL, are marketed as “research chemicals” and come with a certificate of 3rd party analysis indicating purity.

They also have great customer service and fast shipping.

Why Do You Need To Supplement With Spermidine?

Best Spermidine Supplement - Spermidine Life vs Primeadine

Spermidine levels decrease as you age which makes it necessary to get more of it as time goes on.

It is found naturally in many foods like soybeans, wheat germ, and nato.

Unfortunately, most people don’t eat enough of these foods, nor the overwhelming quantity you would need for a noticeable spermidine benefit.

This makes supplementation necessary since the amount present in food, even in the highest spermidine foods, is not enough to replenish what is lost due to age.

Not to mention many of the foods that spermidine is high in are foods that many people can’t eat due to food sensitivities, allergies, or just plain flavor profile. (I’m looking at you nato!)

Getting consistent high levels of spermidine like that from a supplement is the only tried and true way to keep your levels high and autophagy cranking!

Spermidine Supplement Benefits

Spermidine has been shown to have many health-promoting benefits as demonstrated in the literature.

Below are some examples of documented spermidine benefits.

Spermidine and Longevity

Best Spermidine Supplement - Spermidine Life vs Primeadine

Longevity is spermidine’s main benefit.

While we know that a proper diet and lifestyle can keep you healthy and ultimately help you live longer, spermidine has a direct action on your cells’ ability to increase specific longevity-promoting pathways like autophagy.

As a result taking spermidine can help protect you from various diseases that are a result of accelerated aging like heart disease, cancer, and neurodegeneration.5Fei Yue , Wenjiao Li , Jing Zou , Xianhan Jiang , Guibin Xu, Hai Huang , Leyuan Liu, Spermidine Prolongs Lifespan and Prevents Liver Fibrosis and Hepatocellular Carcinoma by Activating MAP1S-Mediated Autophagy Cancer Res. 20176Jingjing Fan , Ziyuan Feng , Ning Chen, Spermidine as a target for cancer therapy Pharmacol Res. 20207Frank Madeo , Tobias Eisenberg, Federico Pietrocola , Guido Kroemer , Spermidine in health and disease Science. 2018


Best Spermidine Supplement - Spermidine Life vs Primeadine

One of spermidine’s most important roles is autophagy. Autophagy is the process by which our cells clean up and recycle damaged or old proteins and organelles.

It’s been shown that spermidine can activate autophagy in many different tissues, including the liver, brain, muscle, and adipose tissue.8Fei Yue 1, Wenjiao Li , Jing Zou , Xianhan Jiang, Guibin Xu , Hai Huang, Leyuan Liu , Spermidine Prolongs Lifespan and Prevents Liver Fibrosis and Hepatocellular Carcinoma by Activating MAP1S-Mediated Autophagy Cancer Res. 2017

If proper autophagy is not activated, these old, damaged cells called senescent cells accumulate and create excess inflammation, which leads to accelerated aging and the diseases associated with aging.9Frank Madeo, Maria A. Bauer, Didac Carmona-Gutierrez, and Guido Kroemer, Spermidine: a physiological autophagy inducer acting as an anti-aging vitamin in humans? Autophagy. 2019

Spermidine and Weight Loss

Best Spermidine Supplement - Spermidine Life vs Primeadine

Spermidine has also been shown to have a beneficial effect on obesity.10Yanee Choksomngam , Sintip Pattanakuhar , Nipon Chattipakorn, Siriporn C Chattipakorn, The metabolic role of spermidine in obesity: Evidence from cells to community Obes Res Clin Pract. Jul-Aug 2021

Adipose tissue (fat) is an organ that plays a major role in metabolism, immunity, and inflammation. It’s now well known that adipose tissue dysfunction is a key player in the development of metabolic syndrome and obesity.

Spermidine has been shown to increase autophagy in adipose tissue, improve insulin sensitivity, and reduce inflammation.11Bruno Ramos-Molina , Maria Isabel Queipo-Ortuño, Ana Lambertos , Francisco J Tinahones, Rafael Peñafiel, Dietary and Gut Microbiota Polyamines in Obesity- and Age-Related Diseases Front Nutr. 2019

All of these effects lead to a reduction in body weight and fat mass.

Spermidine and Cognition

Best Spermidine Supplement - Spermidine Life vs Primeadine

It’s been shown to reduce the effects of neurodegenerative diseases by inhibiting a major neuronal enzyme called acetylcholinesterase, which is responsible for breaking down an important learning and memory neurotransmitter called acetylcholine.12Miranka Wirth, Claudia Schwarz, Gloria Benson, Nora Horn, Ralph Buchert, Catharina Lange, Theresa Köbe, Stefan Hetzer, Marta Maglione, Eva Michael, Stefanie Märschenz, Knut Mai, Ute Kopp, Dietmar Schmitz, Ulrike Grittner, Stephan J. Sigrist, Slaven Stekovic, Frank Madeo & Agnes Flöel, Effects of spermidine supplementation on cognition and biomarkers in older adults with subjective cognitive decline (SmartAge)—study protocol for a randomized controlled trial Alzheimer’s Research & Therapy. 2019

Acetylcholine is critical in our cognitive processes, so spermidine’s inhibition of acetylcholinesterase can lead to improved learning and memory.13Monu Yadav , Milind Parle , Deepak Kumar Jindal , Nidhi Sharma, Potential effect of spermidine on GABA, dopamine, acetylcholinesterase, oxidative stress and proinflammatory cytokines to diminish ketamine-induced psychotic symptoms in rats Biomed Pharmacother. 2018

Spermidine and Cardiovascular Health

Best Spermidine Supplement - Spermidine Life vs Primeadine

Several studies demonstrate spermidine’s heart-healthy benefits.

These studies show spermidine’s ability to reduce coronary artery disease, stroke, heart failure, and death due to vascular disease.14Christin Stegemann , Raimund Pechlaner, Peter Willeit, Sarah R Langley, Massimo Mangino, Ursula Mayr, Cristina Menni, Alireza Moayyeri, Peter Santer, Gregor Rungger, Tim D Spector, Johann Willeit, Stefan Kiechl, Manuel Mayr, Lipidomics profiling and risk of cardiovascular disease in the prospective population-based Bruneck study Circulation. 2014

Evidence also shows drops in blood pressure with increased spermidine supplementation.

The mechanism for this is the increased arginine bioavailability from spermidine that enhances nitric oxide, a potent vasodilator.15Tobias Eisenberg et al, Cardioprotection and lifespan extension by the natural polyamine spermidine Nat Med. 2016

Spermidine Supplement Reviews

Best Spermidine Supplement - Spermidine Life vs Primeadine

If you look for spermidine supplements on Amazon you will be pleasantly surprised by the number of companies selling a spermidine supplements.

At the same time, I’m a big promoter of NOT buying supplements on Amazon. Dietary supplements are notorious for being the most corruptable products sold on Amazon with a high likelihood of receiving a counterfeit product.16FDA, FDA Warns Consumers to Avoid Certain Male Enhancement and Weight Loss Products Sold Through Amazon, eBay and Other Retailers Due to Hidden, Potentially Dangerous Drug Ingredients FDA.2020

There are many reasons for this which I cover in my post all about buying supplements on Amazon.

Many of these companies also sell many other supplements in addition to spermidine.

This means they are manufactured at scale and that typically requires shortcuts to be taken.

These shortcuts involve using harmful additives, preservatives, and excipients that denature the final product and diminish its effectiveness.

My top 2 spermidine choices, Primeadine and Spermidine Life, exclusively manufacture spermidine which is integral to their high efficacy.

Spermidine Supplement Dosage

Best Spermidine Supplement - Spermidine Life vs Primeadine

Most spermidine supplements recommend 800-900mg of spermidine-rich wheat germ per day. This comes out to around 1mg of pure spermidine.

Spermidine has been observed to be safe and effective up to 50mg/kg given intraperitoneally in rats which are well above the recommended doses in most commercially available oral supplements.17Martina Chrisam, Marinella Pirozzi, Silvia Castagnaro, Bert Blaauw, Roman Polishchuck, Francesco Cecconi, Paolo Grumati and Paolo Bonaldo, Reactivation of autophagy by spermidine ameliorates the myopathic defects of collagen VI-null mice Autophagy. 2015

Spermidine Safety, Toxicity, and Side Effects

Spermidine oral supplements are considered generally safe with no serious adverse side effects.18Claudia Schwarz, Slaven Stekovic, Miranka Wirth, et al, Safety and tolerability of spermidine supplementation in mice and older adults with subjective cognitive decline Aging (Albany NY). 2018

The studied lethal dose in rats is 620 mg/kg through the injection cannot be replicated with the available spermidine treatments.19T Sakurada, K Onodera, T Tadano, K Kisara, Effects of polyamines on the central nervous system Jpn J Pharmacol. 1975

Spermidine and Gluten

Best Spermidine Supplement - Spermidine Life vs Primeadine

Because spermidine is sourced mainly from wheat germ there is a small amount of gluten present.  According to Spermidine Life, their spermidine contains 1.36mg of gluten per recommended dose.

To give some perspective a 1 oz slice of white bread contains over 3500mg of gluten.20T Sakurada, K Onodera, T Tadano, K Kisara, Effects of polyamines on the central nervous system Jpn J Pharmacol. 1975

Consult your physician if you have a specific gluten allergy, sensitivity, or celiac.. Otherwise, most people will not be affected by this.

My Personal Spermidine Experience

Let me preface this review with the fact that with spermidine, you don’t feel anything.

You won’t get a buzz or feel a jolt of energy or a wave of relaxation. You will feel the same as you always do.

There’s no way to track longevity and autophagy without geeking out hard-on blood tests and specific measurements, and still, you can’t be sure of the outcome.

In lieu of overcomplicating things, I use my Oura ring and Lumen Metabolism tracker to track progress and see how my body reacts to spermidine.

I recently used Primeadine for a few months and experienced boosts in sleep and readiness scores on the Oura.

This means my body is adapting well to stress, which indicates that my cells are working efficiently and keeping inflammation low.

The Lumen also shows better metabolic flexibility, which would be a strong indicator of autophagy and improved cellular health.

I take 1 pill 4x/a week in the morning with breakfast.

This is 1/3 of the recommended dose of 1mg Spermidine and 900mg concentrated wheat germ.


I highly recommend Spermidine.

As the evidence shows there is a ton of upside and very little downside.

Like all other supplements, quality is king, and Primeadine and Spermidine Life wear the crowns.

I can’t emphasize enough how crucial it is to not buy a cheaper alternative.  Either of these 2 brands will deliver the benefits you want and that’s the whole point of taking Spermidine in the first place.

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Erik Abramowitz is a certified Nutritional Therapy Practitioner (NTP), Naturopathic Doctoral student, health coach, and father. He is the primary content creator for HolisticNootropics.com and the host of the Holistic Nootropics Podcast.

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