Main Research Findings

1) Treatment with spermidine was found to reduce brain aging through the induction of autophagy in a model of SAMP8 mice.

2) Spermidine was found to have the potential to treat and prevent age-associated memory and cognitive decline.

Selected Data

1) The study performed by researchers Xu et al was designed to investigate the potential anti-aging and neuroprotective effects of the naturally occurring polyamines spermidine and spermine, with a specific focus on their influence on cognitive function, autophagy activation, mitochondrial regulation, oxidative stress, inflammation, and neuronal survival. Since aging-related cognitive decline is associated with decreased autophagy, impaired mitochondrial function, oxidative damage, and neurodegeneration, the researchers used a well-established accelerated aging mouse model to examine whether polyamine supplementation could counteract these biological changes. The study compared the effects of spermidine and spermine with rapamycin, a known inducer of autophagy, to determine whether similar cellular pathways contributed to their protective effects [1].
The animal model used in this investigation consisted of three-month-old male senescence-accelerated mouse prone 8 (SAMP8) mice and senescence-accelerated mouse resistant 1 (SAMR1) mice. SAMP8 mice are commonly used as a model of accelerated aging because they naturally develop age-associated characteristics, including learning deficits, memory impairment, oxidative stress, and neurodegenerative changes. SAMR1 mice served as the normal aging control group because they do not develop the same rapid aging phenotype. All animals were housed under specific pathogen-free laboratory conditions and maintained according to established animal care guidelines. The experimental groups included SAMR1 control mice, untreated SAMP8 mice, and SAMP8 mice receiving spermidine, spermine, or rapamycin treatments. Spermidine and spermine were administered orally through drinking water at a concentration of 2 mmol/L, while rapamycin was administered intragastrically at a dose of 0.78 mg/kg/day. Treatments were continued for eight weeks to evaluate the long-term effects of polyamine supplementation on brain aging and neurological function [1].
Following treatment, behavioral experiments were performed to determine whether spermidine and spermine improved age-associated cognitive impairment. The first behavioral assessment was the novel object recognition test (ORT), which evaluated recognition memory based on the natural tendency of mice to explore unfamiliar objects. During the initial phase, mice were placed in a testing chamber without objects to allow them to adapt to the environment. On the following day, two identical objects were placed in the chamber, and the amount of time each mouse spent exploring them was recorded. During the final test phase, one familiar object was replaced with a new object, and memory ability was assessed by measuring preference for the novel object. Researchers calculated the discrimination index by comparing exploration time of the novel object with total exploration time. Improved recognition of the novel object indicated stronger memory retention.
The researchers also conducted an open field test (OFT) to measure locomotor activity, exploratory behavior, and anxiety-related responses. Mice were individually placed in a square testing arena divided into multiple sections and allowed to move freely for five minutes while their behavior was recorded by an overhead camera. Researchers measured movement patterns, distance traveled within the central squares, time spent in the inner area, and exploratory activities such as standing and grooming behaviors. Because aging-related neurological decline can reduce exploratory behavior and increase anxiety-like responses, improvements in these measurements were interpreted as indicators of enhanced neurological function. The arena was cleaned between trials using ethanol to prevent odor-based behavioral influences.
After behavioral testing, brain tissues were collected for molecular and biochemical analyses. Oxidative stress was evaluated by measuring markers associated with cellular damage and antioxidant defense. Malondialdehyde (MDA), an indicator of lipid oxidation caused by reactive oxygen species, was measured to determine the degree of oxidative injury. Superoxide dismutase (SOD) activity was also examined because SOD acts as an antioxidant enzyme that protects cells from oxidative damage. ATP concentrations were measured to evaluate mitochondrial energy production because mitochondrial dysfunction is a major characteristic of aging neurons. These biochemical measurements helped determine whether polyamine treatment improved cellular metabolism and protected the aging brain from oxidative stress [1].
The study also used Western blot analysis to investigate proteins involved in autophagy, mitochondrial function, inflammation, apoptosis, and neuronal health. Brain tissue samples were processed to extract proteins, which were separated using SDS-polyacrylamide gel electrophoresis and transferred onto membranes for antibody detection. Autophagy activity was assessed by measuring phosphorylated AMP-activated protein kinase (p-AMPK), Beclin-1, LC3, and p62. Increased p-AMPK, Beclin-1, and LC3 combined with reduced p62 levels were interpreted as evidence of enhanced autophagic activity. Since mitochondrial balance is essential for healthy aging, proteins involved in mitochondrial fusion and function were analyzed, including mitofusin-1 (MFN1), mitofusin-2 (MFN2), dynamin-related protein 1 (DRP1), and cytochrome c oxidase IV (COX IV) [1].
To determine whether spermidine and spermine protected neurons from degeneration, the researchers examined apoptosis and inflammatory pathways. Western blotting measured apoptosis-related proteins, including the protective protein Bcl-2 and the cell death-associated proteins Bax and Caspase-3. TUNEL staining was performed on brain sections to directly detect apoptotic cells in areas such as the hippocampus and cortex. Inflammation was analyzed by measuring proteins associated with inflammatory signaling, including NLRP3, interleukin-1β (IL-1β), and interleukin-18 (IL-18). Finally, the researchers examined neuroprotective and synaptic markers, including nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), postsynaptic density protein 93 (PSD93), and postsynaptic density protein 95 (PSD95), to determine whether polyamine treatment supported neuronal communication and plasticity. Overall, these methods allowed the researchers to comprehensively evaluate whether spermidine and spermine could reduce brain aging through improvements in autophagy, mitochondrial health, oxidative balance, and neuronal survival [1].
2) The review article completed by researchers Zou et al examined existing scientific evidence to evaluate how the naturally occurring polyamine spermidine influences aging-associated memory decline and cognitive impairment. The researchers organized current knowledge surrounding spermidine by reviewing its biological sources, metabolic regulation, age-related changes, therapeutic potential, and molecular mechanisms responsible for its effects on cognition. The overall objective was to determine whether restoring spermidine availability through diet, supplementation, microbiome modification, or metabolic regulation could represent a potential approach for maintaining brain function during aging [2].
The authors first examined research describing spermidine metabolism, including how the molecule is obtained, produced, distributed, and broken down within the body. Evidence from nutritional studies, microbiome research, and biochemical investigations was reviewed to explain that spermidine originates from three major sources: dietary intake, production by intestinal microorganisms, and internal biosynthesis within mammalian cells. The review analyzed studies investigating spermidine-rich foods such as wheat germ, soybeans, and certain animal-derived products, as well as dietary patterns such as the Mediterranean diet that contain relatively high levels of polyamines. The authors also examined research on gut microbiota contributions to polyamine production, emphasizing that intestinal bacteria can generate precursors such as putrescine, which can later be converted into spermidine and spermine. The review incorporated metabolic pathway studies describing the enzymatic conversion of arginine into ornithine, putrescine, spermidine, and spermine through enzymes such as ornithine decarboxylase, spermidine synthase, and spermine synthase. Spermidine availability depends on diet, microbial activity, cellular synthesis, and catabolism.
The review also evaluated studies measuring spermidine concentrations under aging and disease conditions. The research team compared research analyzing serum, urine, and brain tissue polyamine levels in healthy individuals and patients with aging-associated cognitive disorders, including mild cognitive impairment and Alzheimer’s disease. These studies were included to determine whether altered spermidine metabolism is associated with cognitive decline. Because some investigations reported decreased spermidine levels in aging and neurodegenerative conditions while others found elevated levels in certain disease states, the authors compared different interpretations of these findings. They considered that increased spermidine concentrations observed in some disorders may represent a compensatory response to disease progression rather than a direct cause of pathology [2].
To assess the therapeutic potential of spermidine, the researchers reviewed human clinical studies and epidemiological investigations examining relationships between spermidine intake and cognitive outcomes. These included population-based studies analyzing dietary spermidine consumption, brain structure measurements, dementia risk, and cognitive performance assessments. Randomized clinical trials using spermidine-rich plant extracts were also examined to evaluate whether supplementation improved memory performance in older adults, individuals with subjective cognitive decline, and patients with mild or moderate dementia. The authors compared differences between intervention lengths, spermidine doses, participant groups, and measured outcomes to determine the consistency of cognitive benefits reported across studies.
In addition to human evidence, the review summarized experimental approaches using multiple aging and neurodegenerative disease models. Animal studies involving mice, rats, fruit flies, and nematodes were analyzed because these models allow researchers to examine molecular mechanisms that cannot easily be studied in humans. The authors reviewed experiments investigating whether spermidine supplementation improved learning and memory behaviors while altering biological processes associated with aging. Particular attention was given to studies measuring autophagy, a cellular recycling pathway that removes damaged proteins and organelles. The review included findings from genetic models where autophagy-related genes were altered, allowing researchers to determine whether autophagy activation was necessary for spermidine-mediated cognitive improvements [2].
The authors further reviewed mechanistic studies investigating how spermidine affects mitochondria, synaptic communication, neuronal development, oxidative stress, inflammation, and vascular function. Mitochondrial studies were evaluated by examining research on mitochondrial structure, energy production, mitophagy, and proteins involved in mitochondrial regulation. The review also analyzed studies measuring synaptic plasticity through changes in neurotransmitter receptors, particularly NMDA and AMPA receptors, which are essential for learning and memory formation. Additional cellular studies involving neuronal cultures and immune cells were reviewed to understand how spermidine affects neuronal growth, inflammatory signaling pathways, and oxidative damage. Overall, the authors used evidence from diverse biological systems to create a broad mechanistic explanation of how spermidine may preserve cognitive function during aging. The review concluded by identifying current limitations in the field, including uncertainty surrounding ideal supplementation doses, long-term safety, and differences between animal findings and human clinical outcomes [2].

Discussion
1) The results of the study by Xu et al demonstrated that long-term administration of the natural polyamines spermidine and spermine significantly reduced multiple characteristics of brain aging by improving cognitive function, enhancing autophagy, restoring mitochondrial balance, decreasing oxidative damage, preventing neuronal apoptosis, reducing inflammation, and supporting synaptic function. Using the SAMP8 model, which naturally develops aging-related neurological impairments, the researchers compared untreated aging mice with mice receiving spermidine, spermine, or the autophagy-inducing compound rapamycin. The findings showed that spermidine and spermine produced protective effects similar to rapamycin, suggesting that their anti-aging benefits were strongly associated with the activation of autophagy and the maintenance of neuronal health [1].
The first major finding of the study was that spermidine and spermine improved memory retention and cognitive performance in aging mice. Cognitive function was assessed using the novel ORT, which measures recognition memory by determining whether mice can distinguish between familiar and unfamiliar objects. Untreated SAMP8 mice displayed significant memory impairment compared with the normal-aging SAMR1 control mice, demonstrated by reduced exploration of the novel object and a lower discrimination index.
After treatment with spermidine, spermine, or rapamycin, SAMP8 mice spent more time investigating the new object, showing that memory recognition ability was restored. These results suggested that polyamine treatment was able to reverse or reduce cognitive decline associated with accelerated aging. In the OFT, which measured locomotor activity and anxiety-related behavior, untreated SAMP8 mice displayed reduced exploratory behavior and less movement within the central area of the testing environment. Mice treated with spermidine and spermine showed increased activity, greater distance traveled in the inner squares, and increased time spent exploring the central region. These behavioral improvements indicated that polyamine supplementation enhanced neurological function and reduced aging-associated behavioral deficits [1].
The researchers next examined whether spermidine and spermine influenced oxidative stress, a major contributor to brain aging and neurodegeneration. Aging is associated with the accumulation of reactive oxygen species that damage cellular components, including proteins, lipids, and DNA. The untreated SAMP8 mice showed increased levels of MDA, a marker of lipid peroxidation and oxidative injury, along with decreased activity of the antioxidant enzyme SOD. Treatment with spermidine, spermine, and rapamycin significantly decreased MDA levels while increasing SOD activity within brain tissue. These findings demonstrated that polyamines strengthened antioxidant defenses and protected neurons from oxidative damage. By restoring the balance between reactive oxygen species production and antioxidant activity, spermidine and spermine helped create a healthier cellular environment that could support neuronal survival during aging.
The study also found that spermidine and spermine improved neuronal communication by increasing the expression of proteins involved in synaptic function and neuroplasticity. Aging and neurodegenerative conditions are commonly associated with synaptic loss, which contributes to impaired learning and memory. The researchers measured important neuronal markers, including NGF, BDNF, PSD93, and PSD95. Untreated SAMP8 mice exhibited reduced expression of these proteins, suggesting impaired neuronal support and weakened synaptic connections. Following treatment with spermidine, spermine, or rapamycin, expression levels of NGF, BDNF, PSD93, and PSD95 were significantly increased. These changes indicated that polyamine supplementation supported synaptic stability, promoted neuronal survival, and enhanced pathways involved in learning and memory formation. The improvement in these molecular markers was consistent with the behavioral improvements observed during memory testing [1].

Figure 1: A) Western blot of NGF, PSD93, PSD95, and BDNF; B) changes in BDNF levels; C) changes in NFG; D) changes in PSD93; and E) changes in PSD95.
Another important result was that spermidine and spermine restored mitochondrial function in aging brains. Mitochondrial dysfunction is considered one of the major hallmarks of aging because mitochondria provide the energy required for neuronal activity and regulate processes such as oxidative stress and cell survival. Untreated SAMP8 mice showed abnormal expression of mitochondrial regulatory proteins and reduced ATP production, indicating impaired mitochondrial performance. Treatment with spermidine and spermine increased the levels of mitochondrial fusion proteins MFN1 and MFN2, which are responsible for maintaining mitochondrial structure and function. The treatments also influenced DRP1, a protein involved in mitochondrial fission, and increased COX IV, an important marker of mitochondrial respiration. Additionally, ATP concentrations increased in treated mice, suggesting improved energy production. These findings demonstrated that polyamines helped preserve mitochondrial balance and provided neurons with the energy necessary for normal function [1].
The researchers further investigated whether the protective effects of spermidine and spermine were connected to autophagy, a cellular recycling process responsible for removing damaged proteins and organelles. The results showed that untreated SAMP8 mice had impaired autophagic activity, demonstrated by decreased levels of autophagy-related proteins. Spermidine and spermine treatment increased phosphorylation of AMPK, a major regulator that promotes autophagy. In addition, treatment increased the expression of Beclin-1 and LC3-II, proteins involved in autophagosome formation and autophagic activity, while decreasing levels of p62, a protein that accumulates when autophagy is impaired. These changes indicated that spermidine and spermine restored normal autophagic function in aging brain tissue. Since rapamycin produced similar results, the findings supported the idea that polyamine-induced autophagy activation was a key mechanism responsible for delaying brain aging.
The study also revealed that spermidine and spermine protected neurons by reducing apoptosis, or programmed cell death. Aging SAMP8 mice displayed increased expression of pro-apoptotic proteins, including Bax and cleaved Caspase-3, along with reduced levels of the protective anti-apoptotic protein Bcl-2. TUNEL staining confirmed that untreated aging mice had increased numbers of apoptotic cells in important brain regions such as the hippocampus and cortex. Treatment with spermidine, spermine, and rapamycin reversed these changes by decreasing Bax and Caspase-3 expression while increasing Bcl-2 levels. The number of TUNEL-positive cells was also greatly reduced, indicating improved neuronal survival. These results suggested that polyamines prevented excessive neuron loss during aging by regulating pathways responsible for cell death [1].
Finally, spermidine and spermine significantly decreased brain inflammation associated with aging. Untreated SAMP8 mice showed increased activation of inflammatory pathways, including elevated levels of NLRP3 inflammasome proteins, IL-1β, and IL-18. These inflammatory factors are known to contribute to neuronal damage and cognitive decline. After treatment with spermidine, spermine, or rapamycin, the expression of these inflammatory markers was sharply reduced, demonstrating that polyamines suppressed neuroinflammation. Overall, the results showed that spermidine and spermine delayed brain aging through multiple interconnected mechanisms: activating AMPK-mediated autophagy, restoring mitochondrial function, improving energy production, decreasing oxidative stress, preventing neuronal apoptosis, reducing inflammation, and preserving synaptic proteins involved in memory. The researchers concluded that these natural polyamines may represent promising compounds for protecting against age-related cognitive decline and neurodegenerative changes [1].
2) The review article completed by researchers Zou et al summarized evidence demonstrating that spermidine has significant potential to protect against age-related cognitive decline through several interconnected biological mechanisms, including restoration of autophagy, preservation of mitochondrial function, maintenance of synaptic activity, reduction of oxidative stress and inflammation, and promotion of neuronal health. The authors concluded that declining spermidine availability during aging may contribute to impaired cellular maintenance and neurological dysfunction, while restoring spermidine levels through dietary intake, supplementation, or regulation of metabolism may improve memory and cognitive performance. Evidence from human observational studies, clinical trials, and experimental models suggests that spermidine influences several of the major pathways associated with brain aging and neurodegenerative disorders [2].
One major finding discussed in the review was that spermidine metabolism changes significantly with aging and cognitive disorders. Research has shown that polyamine concentrations, including spermidine, often decline as organisms age, and this decrease may reduce the brain’s ability to maintain normal cellular function. Several human studies reported that serum, urinary, and brain spermidine levels are altered in individuals experiencing memory decline, mild cognitive impairment (MCI), and Alzheimer’s disease (AD). Some investigations found lower spermidine levels in patients with cognitive impairment compared with healthy individuals, suggesting that reduced spermidine availability may contribute to disease progression. However, other studies reported elevated spermidine concentrations in certain Alzheimer’s disease patients, which the authors suggested may represent a compensatory response to neuronal damage rather than a direct cause of disease. These differences indicate that spermidine regulation is complex and may vary depending on disease stage, severity, and individual metabolic differences.
The review found strong evidence supporting the ability of spermidine supplementation to improve memory and cognitive function. Human population studies showed that higher dietary spermidine intake was associated with better cognitive performance and reduced risk of cognitive decline. Study findings suggested that individuals consuming diets naturally higher in spermidine displayed improved cognitive outcomes. Other research demonstrated that increased spermidine intake was associated with larger hippocampal volume and improved brain structure in older adults and individuals experiencing subjective cognitive decline. Since the hippocampus is a brain region essential for memory formation, these findings suggest that spermidine may help preserve areas of the brain that are vulnerable to aging [2].
Clinical studies reviewed by the authors further supported spermidine’s beneficial effects. Randomized controlled trials using spermidine-rich plant extracts showed that supplementation was safe, well tolerated, and capable of improving memory performance in older adults. A three-month intervention using spermidine-rich wheat germ extract improved memory-related outcomes in participants with subjective cognitive decline. Additional clinical research involving older adults with mild or moderate dementia found that higher spermidine doses produced greater improvements in cognitive performance compared with lower doses. A large population-based study also suggested that dietary spermidine consumption was associated with a reduced risk of developing dementia. However, the authors noted that not all trials produced positive results. Some longer-term supplementation studies did not significantly improve cognitive measurements, indicating that factors such as dose, treatment duration, participant characteristics, and disease progression may influence spermidine effectiveness [2].
A central conclusion of the review was that spermidine improves cognition largely by activating autophagy, a cellular process responsible for removing damaged proteins and organelles. Aging is commonly associated with reduced autophagy, which contributes to the accumulation of harmful proteins and cellular waste within neurons. Experimental studies showed that spermidine supplementation enhanced autophagy in multiple organisms, including fruit flies, rodents, and disease models. In aged animals, spermidine restored autophagic activity and improved clearance of abnormal proteins associated with neurodegeneration, such as amyloid-beta and phosphorylated alpha-synuclein. Studies using autophagy-deficient models demonstrated that blocking autophagy reduced or eliminated spermidine’s memory-enhancing effects, suggesting that activation of this pathway is necessary for many of its cognitive benefits..
Another important finding was that spermidine helps maintain synaptic function, which is essential for learning and memory. Aging and neurodegenerative diseases frequently involve synaptic deterioration, leading to reduced communication between neurons. Experimental studies showed that spermidine preserved synaptic structures, restored synaptic vesicle function, and improved long-term potentiation (LTP), a process necessary for memory formation. Spermidine was found to influence NMDA receptors, particularly GluN2B-containing receptors, which regulate learning-related signaling pathways. Activation of these receptors triggered downstream pathways involving nitric oxide signaling, protein kinases, CREB activation, and BDNF. Spermidine also influenced AMPA receptor activity by restoring modifications of the GluA1 receptor subunit, further supporting improved synaptic communication and memory capacity [2].
Additional findings showed that spermidine supports brain health by promoting neuronal development, decreasing oxidative stress, reducing inflammation, and improving vascular function. Studies demonstrated that spermidine increased neurite growth, supported neuronal migration, and enhanced BDNF/TrkB signaling, which contributes to neuronal survival and plasticity. Spermidine also reduced oxidative damage by lowering harmful reactive oxygen species and increasing antioxidant defenses. Inflammatory markers associated with brain aging, including interleukin-1β, interleukin-18, NLRP3, and tumor necrosis factor-alpha, were decreased following spermidine treatment in animal and cellular models. Furthermore, spermidine improved endothelial cell function and promoted angiogenesis, which may help maintain blood supply and metabolic support for aging brain tissue [2].
Overall, the review concluded that spermidine provides broad neuroprotective effects by targeting multiple biological processes involved in aging-related cognitive decline. Rather than acting through a single mechanism, spermidine appears to improve brain function by coordinating autophagy activation, mitochondrial repair, synaptic preservation, antioxidant responses, anti-inflammatory effects, and neuronal regeneration. Although the evidence from laboratory and early clinical studies is promising, the authors emphasized that additional human research is required to determine optimal dosing, long-term safety, and effectiveness in different aging-related neurological conditions. The findings suggest that maintaining appropriate spermidine levels through diet or supplementation may represent a potential strategy for supporting cognitive health and delaying memory decline associated with aging [2].

Disclaimer

**LAB USE ONLY**
*This information is for educational purposes only and does not constitute medical advice. THE PRODUCTS DESCRIBED HEREIN ARE FOR RESEARCH USE ONLY. All clinical research must be conducted with oversight from the appropriate Institutional Review Board (IRB). All preclinical research must be conducted with oversight from the appropriate Institutional Animal Care and Use Committee (IACUC) following the guidelines of the Animal Welfare Act (AWA).

Citations

[1] Xu TT, Li H, Dai Z, et al. Spermidine and spermine delay brain aging by inducing autophagy in SAMP8 mice. Aging (Albany NY). 2020;12(7):6401-6414. doi:10.18632/aging.103035

[2] Zou M, Li D, Yang Y. The memory- and cognition-facilitating effects of spermidine in aging and aging-related disorders. Ageing Res Rev. 2025;109:102787. doi:10.1016/j.arr.2025.102787

Characteristics of Spermidine 3HCl

Spermidine 3HCl is a nootropic compound originally discovered by the Dutch scientist, Anton Van Leeuwenhoek. Spermidine is found in the sperm and is derived from two polyamines, putrescine and spermine. Polyamines are considered unique due to their ability to attach to a multitude of different molecules. That being said, polyamines are shown to be involved in the regulation of DNA stability and cellular functions such as apoptosis, proliferation, and growth. This involvement indicates that polyamines function in a similar fashion as growth factors in cellular division. Since it is composed of two different polyamines, spermidine HCL can be considered essential to healthy growth and development. Additional benefits of spermidine 3HCl, include increased longevity, anti-aging, and improved health of the reproductive system.

Since spermidine plays an integral role in cell metabolism and functioning, the compound is typically found in all eukaryotic cells. Spermidine also acts as an essential growth factor when found in various types of bacteria. The compound is readily available in many whole foods such as a multitude of vegetables, soybean products, wheat germ cereals, and aged cheeses, however, the spermidine levels in these foods are low. Animal-based studies have found that food-extracted supplementation has shown to be more efficient in eliciting benefits in subjects.

Longevity Benefits of Spermidine 3HCl

While typical supplements work by filling in gaps in nutrients, spermidine 3HCl works through its active ingredients that manipulate the molecular pathways involved in aging. One of the primary examples of this is spermidine’s ability to induce autophagy. Autophagy naturally occurs in cells in order to regulate cellular metabolism. Furthermore, it is considered to be the process of cellular rejuvenation through the involvement of the TOR kinase pathway. Autophagy is also responsible for the balance of nutrients during times of increased cellular stress such as fasting. This explains why compounds such as spermidine that mimic fasting and calorie restriction induce autophagy. Overall, this mechanism is thought to promote longevity and anti-aging as autophagy effectively limits inflammation and oxidative stress.

Research related to spermidine’s ability to combat inflammation and oxidative stress has found that supplementation with the compound is able to protect DNA from oxidation and mitochondrial DNA from age-related mutations. That being said, aging, degeneration, and certain diseases, such as cancer, are correlated to the length of telomeres. Telomeres act as end caps to chromosomes and while they naturally shorten with age, the rate of shortening directly impacts longevity. Both telomere length and instability of the mitochondrial genome are used to measure age in changing individuals, however, animal-based research has found that administration of spermidine actively inhibits more than 50% of typical aging hallmarks (https://longevity.technology/news/spermidine-a-geroprotector-supplement/).

Current research has found that in addition to improving overall health and longevity, spermidine is able to prevent neurodegeneration and many age-related diseases such as heart disease or cancer. The compound’s neuroprotective effects that work to treat inflammation, ischemia, and oxidative stress are also related to spermidine’s potential ability to improve memory and cognition. Through autophagy, spermidine and dissolving amyloid-𝜷 proteins in the brain. This is important to note considering that amyloid-𝜷 proteins tend to build into plaques that cause dementia and Alzheimer’s Disease. Early studies have supported this claim and reported that spermidine is able to prevent memory loss in animals with induced dementia.

Fertility Benefits of Spermidine 3HCl

Another interesting benefit of Spermidine 3HCl is its potential to improve fertility in both male and female, aged animals. Female animals are able to have children until they reach menopause. Research has found that the onset of menopause can be accelerated through the accumulation of reactive oxygen species (ROS) in the ovaries. ROS is a form of oxidative stress that has been shown to damage oocytes and cause cellular degeneration in the reproductive system. ROS can also limit fertility by causing abnormal development of the female germline stem cells (FGSCs). Researchers Li et. Al suggested that abnormalities in FGSCs caused by oxidative stress could be prevented by administering spermidine. Results of their research found the FGSCs treated with spermidine experienced increased autophagy and stem cell production (https://pubmed.ncbi.nlm.nih.gov/31319247/).

Studies have found that spermidine levels are lower in infertile male subjects. While male animals do not experience reproductive aging as rapidly as female animals do, spermidine is still capable of improving male fertility as well. Sperm production is highly influenced by different hormones, and is notably decreased by the presence of cortisol. Researchers Bendera et. Al found that administration of spermidine for 30 days could drastically lower cortisol levels in subjects. Results also found that the compound was able to reduce levels of oestradiol, a hormone typically linked to decreased sexual functioning in males. The researchers also observed increased testosterone and DHEAs, allowing them to conclude that spermicide is effective in terms of male reproductive health and functioning (https://longevity.technology/lifestyle/everything-you-need-to-know-about-spermidine/).

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