Naturally Occurring Polyamine
Solaray Spermidine delivers a clinically studied dose of spermidine.
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This clinically studied dose of spermidine is sourced from rice germ extract for plant-based support to help maintain healthy levels.*
†Miricell™ is a trademark of Nutraland USA, Inc.
Spermidine (from Miricell(TM) rice germ extract), tapioca dextrin, cellulose, vegetable cellulose capsule, citric acid, and silica
Use only as directed. Take 1 VegCap once daily with a meal or glass of water. Store in a cool, dry place
Target cellular health—a vital component of longevity—with spermidine. This clinically studied dose is sourced from rice germ extract for plant-based support.
A landmark study of Danish twins found that only 25% of the variation in human lifespan is genetic, with the remaining 75% determined by lifestyle choices, environment, and daily habits.1
That concept reframes aging entirely—you’re not limited by what you inherit. You shape your longevity every day.
1 Herskind, A.M. et al. The heritability of human longevity: A population-based study of 2872 Danish twin pairs born 1870–1900. Hum Genet 97, 319–323 (1996). https://doi.org/10.1007/BF02185763
Spermidine plays a critical role in several cellular functions including cell growth, autophagy, and DNA stabilization, but spermidine levels in the body decrease as we age.*
Maintaining healthy levels of this naturally occurring polyamine impact the body’s built-in renewal switch—which is essential for healthy aging.*
Since 1973, Solaray has believed that what you put in your body should be proven, not promised.
We source our own raw materials and triple-test every lot.
We manufacture 95% of our products for full control.
15,000 tests per month verify ingredient potency and purity.^
In an industry where quality can vary widely, testing isn't just a step in the process. It is the process.
✅ Passed Testing for Heavy Metals**
Arsenic, cadmium, lead, mercury
✅ Passed Testing for Microbials**
Mold, yeast, coliform, e. Coli
✅ Passed Testing for Contaminants**
Gluten, ethylene oxide
✅ Passed Testing for Physical Properties
Moisture, color, disintegration, tap density, mesh 140, 20, and 60
**Most contaminants, heavy metals, and microbes are tested to ensure no more than 3 ppm.
Our production facility in Ogden, Utah is a GMP facility certified by NSF. We source and triple-test raw materials, make the majority of our products in-house, conduct stringent testing in our ISO-accredited lab, and distribute our own products to ensure quality and excellence in every bottle.
Naturally occurring polyamine
Disclaimer: The customer reviews and testimonials featured on this site reflect individual experiences and opinions. Results may vary and are not guaranteed. These statements have not been evaluated by the Food and Drug Administration (FDA). The content is not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare professional before starting any new supplement regimen or if you have concerns about your health.
Overall rating: 4.647059 / 5 from 34 reviews.
Spermidine is a clinically studied supplement sourced from rice germ extract, designed to help maintain healthy levels. Customers praise its easy-to-take capsules and clean ingredients, though opinions on taste and smell are mixed.
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"I’ve been taking Solaray unlimit spermidine as part of my morning routine and I like how simple it is to add to the supplements I already take the capsules are easy to swallow feel fresh and I appreciate the straightforward ingredient list and naturally occurring polyamine source. it’s still early so I can’t speak to long-term results yet but so far I’m happy with the quality and consistency."
— LuisaJ (5/5)
"I’ve been taking these supplements for a few days now. I haven’t seen any benefits as of yet. However, from reading on what this can do, it sounds amazing. The pills are in the smaller range regarding size. They don’t have a taste. However, the smell of the inside of the bottle is questionable. My husband didn’t smell anything but I definitely did. I haven’t had any negative side effects. It does say to take these capsule with food or a glass of water."
— JenniferD (3/5)
"Between the dosage (1 pill) and its size, these are really easy to take for someone who is normally terrible at ingesting large vitamins. No odor, no flavor, and thankfully no tummy issues. Now, in terms of long term benefits, this is where is becomes interesting and would recommend everyone to do their own research. For me, whether its placebo or not, my skin does happen to look better and my brain happens to be more focused since starting to use these. Give it a shot if youre curious."
— GabrielL (5/5)
"I’ve been happy with Solaray UNLIMIT Spermidine VegCaps. The capsules are easy to take, and I appreciate that they are plant based. I have been feeling more clear minded since I’ve been taking it, and I have had more energy as well. I will definitely continue to take these supplements, and I am excited to see the long term benefits."
— CendyR (5/5)
"I’m so excited about this Solaray UNLIMIT Spermidine. The ingredients list that supplement came from rice germ which is gluten free and from natural food source. Yayy. I’ve been reading about beneficial Spermidine is as we age. Spermidine works by activating a cellular process called Authophagy which potentially helps cells maintains normal function as we age. I can’t wait to see more benefits of this supplement. I’ve been taking this to support mitochondria health."
— AmyK (5/5)
"This supplement is in a transparent vegetable cellulose capsule, and it has no taste or smell, and it is easy to swallow. I heard spermidine has longevity and anti-aging effects if you take it for a long time, like 12 months. I only started taking this several days ago, so I cannot talk about the effects yet, but I can recommend this pill for its clean ingredients and ease of swallowing."
— YukoH (5/5)
"Spermidine is supposed to help your body’s cardiovascular and cellular function, help promote collagen production, and improve cognition. I can’t say that I can tell it’s working yet but what I can attest to is the comfort and ease of taking this supplement. It’s flavorless and doesn’t have a smell. It’s a small capsule that’s easy to swallow and requires only one per day. So far, I would recommend!"
— TeslaG (5/5)
"Small vegcaps that are ready to swallow and has 60 servings. A good size bottle that doesn't take up all the room in my cabinet. I've never tried this before and it explains on the bottle where spermidine is naturally found. Excited to add this into my wellness routine!"
— VincenzaC (5/5)
"This product is worth considering for someone interested in longevity and cellular health, but I would view it as an optional wellness supplement rather than necessity."
— MiemieZ (4/5)
"I really started to notice the difference after about a week of taking this. Everything from my energy level to my mental clarity was better and best of all my face cleared up and became super healthy looking skin wise. I would definitely recommend giving this a try and adding it to your daily supplements as you really have nothing to loose and everything to gain."
— CraigM (5/5)
*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.