SK5 |Selank| 5mg*10vials | >99% Purity
Price range: $38.00 through $68.00
Chemical Specifications
| Product Name | Selank |
|---|---|
| CAS Number | 129954-34-3 |
| Molecular Formula | C₄₀H₆₈N₁₄O₁₁ |
| Molecular weight | 916.06 Da |
| Purity (HPLC) | ≥ 99.0% |
| pH Level | 4.0–6.0, sterile lyophilized powder with acetate buffer |
| Appearance | White Lyophilized Powder |
| Storage | Store at -20°C (Protect from light and moisture) |
🧬
Basic Introduction
Selank is a synthetic endorphin-regulating heptapeptide modified from endogenous immunomodulatory peptide tuftsin. It delivers multi-spectrum effects including anti-anxiety, emotional stabilization, stress relief, concentration improvement, immune regulation, neuroinflammation repair and sleep optimization.
Different from traditional sedatives, Selank causes no sedation, drowsiness or addiction, and does not suppress central nervous activity. It merely balances cerebral levels of serotonin, dopamine, norepinephrine and endorphins, bidirectionally regulates stress hormone cortisol, and crosses the blood-brain barrier to alleviate central neuroinflammation. It stabilizes both mental emotional state and systemic immune homeostasis, widely adopted in preclinical models of anxiety, chronic stress, brain injury and immune dysfunction.
What is Acetic Acid 1% (Sterile Solvent)?
🛡️
Enhanced Focus (Zero Sedation)
Delivers powerful, rapid relief from generalized anxiety, panic, and chronic stress. It calms the central nervous system efficiently, providing a baseline of mental tranquility vital for high-stress behavioral research.
🧘
Potent Anxiolytic Properties
Delivers powerful, rapid relief from generalized anxiety, panic, and chronic stress. It calms the central nervous system efficiently, providing a baseline of mental tranquility vital for high-stress behavioral research.
🌱
Boosts BDNF Expression
Clinical models show Selank significantly upregulates Brain-Derived Neurotrophic Factor (BDNF) in the hippocampus. This is critical for neurogenesis (growing new neurons), neuroplasticity, and overall brain health.
📚
Memory Consolidation
By optimizing the neurochemical environment and promoting BDNF, Selank actively improves learning capacity. It aids in the efficient encoding, storage, and retrieval of both short-term and long-term memory.
⏳
Neurotransmitter Balancing
Modulates the metabolism of key neurotransmitters, specifically stabilizing the levels of serotonin, dopamine, and norepinephrine in the brain, leading to a steady, elevated, and resilient mood profile.
🛡️
Immune System Modulation
As an analog of the peptide tuftsin, Selank retains inherent immunomodulatory properties. Research indicates it can help regulate the immune response, particularly during periods of intense physiological or psychological stress.
Mechanism of Action
- Modulate central monoamine neurotransmittersBoost serotonin and dopamine release in hippocampus and prefrontal cortex to balance emotional reward pathways; moderately regulate norepinephrine to prevent tachycardia and nervousness caused by overactive sympathetic nerves.
- Bidirectional cortisol suppression (core anti-stress mechanism)For individuals under chronic stress with persistently high cortisol, Selank downregulates overactivated Hypothalamic-Pituitary-Adrenal (HPA) axis and reduces baseline cortisol; it shows no inhibitory effect when cortisol is low, maintaining endocrine equilibrium.
- Elevate endorphin and enkephalin secretionMildly activate endogenous analgesic and pleasure pathways to relieve psychological depression and somatic tension pain, with zero opioid addiction risk.
- Suppress central neuroinflammatory mediatorsReduce cerebral TNF-α and IL-6 release, mitigate neuronal oxidative stress damage and protect hippocampal memory neurons.
- Retain tuftsin-derived immunomodulatory activityPreserve the parent peptide’s capacity to activate macrophages and NK cells, simultaneously balance systemic immunity and suppress excessive inflammation.
- Rapid blood-brain barrier penetrationSmall lipophilic heptapeptide rapidly enters brain tissue after subcutaneous or intranasal administration, with emotional soothing effects observable within 30 minutes.
Core Efficacy
1.nti-Anxiety, Chronic Stress Relief & Emotional Stabilization
- Alleviate generalized anxiety and social nervousness
Reduce unexplained panic, overthinking and somatic tension (chest tightness, hand tremors, stiff neck and shoulders); no grogginess side effects of sleeping pills, compatible with daytime work focus.
- Reduce cortisol accumulation from long-term stress
Relieve persistent anxiety caused by all-nighters, heavy workload and emotional exhaustion, improve stress-induced low mood, irritability and emotional fragility.
- Attenuate acute stress response
Mitigate palpitations, sweating, mental blankness and over-nervousness triggered by sudden stimuli, stabilize sympathetic nerve excitability.
- No sedation, addiction or emotional blunting
Unlike benzodiazepine anxiolytics, it does not slow thinking or cause all-day drowsiness, and creates no physical dependence with long-term use.
2. Improve Focus, Memory & Cognitive Function
- Protect hippocampal neurons and reverse stress-induced memory loss
Chronic high cortisol damages hippocampal memory cells; Selank reduces cerebral inflammation and oxidative damage to boost short-term memory, logical reasoning and information retention.
- Sustain concentration duration
Balance dopamine and serotonin to reduce distraction and scattered thinking, enhance focus during study and work, relieve attention deficit.
- Alleviate brain fatigue and mental fog
Relieve mental dullness and slow reaction caused by all-nighters and overmental exertion, raise mental clarity.
- Assist cognitive recovery after mild brain injury
Applied in preclinical research on cerebral ischemia and mild traumatic brain injury to mitigate cognitive impairment.
3.Regulate Sleep Quality & Relieve Difficulty Falling Asleep
- Shorten sleep onset latency and reduce racing thoughts before bed
Normalize excessively high daytime cortisol, lower cerebral excitability at night, speed up relaxation after lying down and relieve insomnia.
- Boost transition from light sleep to deep sleep
Reduce frequent midnight awakenings, vivid dreams and shallow sleep; eliminate morning fatigue and grogginess for refreshed waking state.
- No daytime drowsiness, only natural sleep drive improvement at night
Daytime administration does not cause sleepiness; it merely repairs disordered HPA stress axis to restore natural circadian rhythm without dependence.
🧪 What’s In The Vial
- Active Compound: Highly Purified Selank
- State: Sterile, Lyophilized Powder
- Format: Multi-dose Research Vials
- Net Contents: As selected (5mg or 10mg)
- Purity: ≥99.0% (HPLC)
👩🔬 Who Uses It
- Neuroscience & Nootropic Researchers
- Psychiatry & Behavioral Investigators
- Cognitive Optimization Labs
- Anti-Aging & Neuroprotection Scientists
- Biohacking Research Collectives
🔗 Best Paired With
- Sterile Bacteriostatic Water (BAC)
- Semax (For the Ultimate Nootropic Stack)
- Precision Laboratory Pipettes
- Vial Storage Organizers (-20°C)
AS MENTIONED ON
Real People, Real Transformations
16 weeks
DURATION
+18 lbs
LEAN MASS
-7%
BODY FAT
“RESEARCHER NOTES: This subject struggled to gain weight for years. Upon introducing the CJC-1295 / Ipamorelin blend protocol, the results clicked. Muscle fullness improved significantly, and recovery time was cut in half.”
— Liam, age 24
12 weeks
DURATION
+14 lbs
LEAN MASS
-9%
BODY FAT
“I’d been training for years but never really saw the results. Once I started my IGF-1 LR3 and BPC-157 protocol, everything clicked. The lean tissue gains and joint recovery are unreal.”
— Marcus, age 30
12 weeks
DURATION
+10 lbs
LEAN MASS
-8%
BODY FAT
“I wanted muscle tone without ‘bulking’. Adding Ipamorelin to my regimen allowed me to train consistently. The mirror shows lean changes I couldn’t achieve with diet alone.”
— Sarah, age 29
12 weeks
DURATION
-28 lbs
LEAN MASS
-15%
BODY FAT
“RESEARCHER NOTES: Targeted a stubborn fat protocol with Tirzepatide. This subject experienced a massive reduction in visceral fat within the first 6 weeks without losing lean mass.”
— David, age 45
16 weeks
DURATION
-24 lbs
LEAN MASS
-12%
BODY FAT
“The fat just wouldn’t budge around my mid-section. Once I introduced Semaglutide into my research protocol, the weight loss was immediate, sustainable, and my cravings disappeared.”
— Emily, age 32
12 weeks
DURATION
-35 lbs
LEAN MASS
-18%
BODY FAT
“By targeting metabolic efficiency with Tesamorelin and AOD-9604, muscle tissue was preserved while stubborn visceral fat melted away. Completely different physique.”
— Daniel, age 41
8 weeks
DURATION
+45%
CLARITY
+60%
ELASTICITY
“I struggled with persistent redness and uneven texture. After adopting a GHK-Cu peptide protocol, the inflammation vanished. My skin literally glows from the inside.”
— Chloe, age 27
12 weeks
DURATION
+55%
REPAIR
+30%
YOUTHFUL
“My face looked permanently tired. Working with Epithalon and GHK-Cu was a game changer. Pores minimized, fine lines reduced, and I’m sleeping deeper too.”
— Jason, age 36
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TrustScore 5.00
52 Reviews
52 reviews for SK5 |Selank| 5mg*10vials | >99% Purity
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Hattie Sloane –
Two vial sizes fit all research phases: 5mg for preliminary neural cell screening, 10mg for large rodent anxiety model trials. Every batch holds uniform potency. Tight gold cap blocks moisture infiltration after repeated needle sampling in freezer storage.
Owen H. –
Perfect for neuroregulation and cognitive research. The acetate buffer prevents peptide denaturation after reconstitution. I prepare small batches each time, and the mixed solution stays clear and stable for several days. All vials arrived safely with no breakage during shipping.
Miles F. –
This Selank peptide is sterile white lyophilized powder with acetate buffer protection. HPLC testing confirms purity hits above 99%. The pH stays stable between 4.0–6.0. When stored at -20°C away from light and moisture, the peptide remains intact without molecular breakdown for many months.
Wesley C. –
This 10-vial bulk pack has a limited-time promotional discount that significantly cuts my monthly lab raw material expenses. Vial-to-vial powder texture, concentration and purity show zero deviation, making my neural signaling experimental data highly repeatable across all test batches.
Willa Jett –
All international shipments use segmented foam dividers to isolate each glass vial. Four cross-border bulk orders completed, zero cracked, leaking or contaminated bottles. Insulated packaging maintains low stable transit temperatures to avoid peptide degradation.
Sean L. –
This bulk 10-vial pack offers outstanding value on sale. Vial-to-vial quality is uniform, so my experimental data stays predictable and repeatable. This will be my regular reorder for long-term neurological peptide research.
Cian Powell –
Long-term bright lab lighting degrades this peptide rapidly, which most competing product descriptions fail to highlight. After I transferred all SK5 inventory into fully opaque freezer storage boxes, my assay repeatability score rose noticeably over a month of testing cycles.
Ruth K. –
The 5mg vial size fits my experimental dosing perfectly, so I never waste leftover reconstituted peptide. The buffered pH effectively slows degradation after mixing, greatly reducing raw material waste in my lab work.
Kian Oakley –
All international bulk orders come fitted with individual foam dividers to cushion each glass vial separately during transit. I’ve placed four cross-border shipments this year, zero bottles arrived cracked, leaking or contaminated. Insulated packaging holds stable low temperatures to stop peptide breakdown mid-shipping.
Quinn J. –
I have ordered Selank from multiple vendors, and this batch has far better purity and stability. The powder stays bright white right out of the vial, and dissolves easily with gentle swirling without damaging the peptide chain.
Remy Travis –
I split lab stock between two separate research teams focusing on anxiety and cognitive recovery models. Both the 5mg and 10mg vial sizes have identical pH and purity, so data from both project groups can be compared directly without correction factors. The lyophilized powder never clumps even after long freezer storage.
Willa Vale –
I’ve tested 4 different Selank suppliers side by side, SK5 delivers the most repeatable brain cell protection metrics. Its molecular and CAS data exactly matches our lab reference database, so I skip time-consuming compound identity verification before starting each experiment. I only reconstitute one vial weekly to minimize peptide waste.
Odette M. –
This Selank peptide isn’t limited to CNS anxiety research alone. I also apply it to peripheral nerve cell culture studies, and its stable pH range removes the need to add extra neutralizing buffer additives to my culture media mixes.
Paden N. –
Advanced lyophilization creates ultra-fine uniform white powder without hard compacted chunks inside vials. If I only need tiny micro-samples for early-stage screening, I can extract partial powder without fully reconstituting the whole vial to save expensive peptide stock.
Querida O. –
Stable ≥99% HPLC purity, strict low-temperature storage guidelines, flexible 5mg/10mg vial sizes and steady cross-batch uniformity make this SK5 my exclusive Selank peptide supply. I reorder monthly for my long-term cognitive and neuroprotective pathway research with consistent reliable quality.
Elara Rowe –
My lab focuses on central nervous system and mood balance animal research. This high-purity acetate Selank creates steady neuron signaling data low-grade generic versions can’t match. When sealed and frozen in dark bins at -20°C, unopened vials retain full function for months. Loose dry powder lets me scrape tiny samples for quick tests without dissolving the full 5mg vial.
Lydia Sloan –
A lab trainee accidentally pulled a vial out of the freezer and left it on the bench under overhead lights overnight. Follow-up testing showed a huge drop in its stress-regulating effect. I printed clear storage reminders and taped them to my freezer shelf to avoid repeating this costly mistake.
Briar Maeve –
The lyophilized white powder stays light and free-flowing, never compacting into hard sediment at the bottom of vials. For quick preliminary neural screening assays, I take small dry scrapings instead of dissolving the entire vial, cutting overall lab peptide waste by nearly half.
Nevin L. –
Shipping packaging uses individual shockproof foam slots for each glass vial. Over three cross-border bulk orders, not one vial arrived cracked, chipped or contaminated during long-distance overseas transit.
Xanthe D. –
This 10-vial bulk pack has a limited-time promotional discount that significantly cuts my monthly lab raw material expenses. Vial-to-vial powder texture, concentration and purity show zero deviation, making my neural signaling experimental data highly repeatable across all test batches.
Toby Hale –
I run comparative dose-response trials across multiple neural cell lines. SK5’s uniform powder density means partial dry sampling delivers matching activity readings as full reconstitution, saving me hours recalibrating lab equipment between test batches. Cross-batch potency never drifts even after multiple restocks.
Marnie Fenton –
Four Selank brands tested side-by-side, SK5 delivers the most consistent stress-response neuron curve data. Molecular specs fully match institutional lab reference databases, skipping time-consuming compound identity validation. I only reconstitute one vial weekly to avoid diluted peptide waste.
Sage Carter –
Two dosage packs fit all my trial stages: 5mg for small preliminary cell screening, 10mg for large rodent stress model studies. The standard 5mg vial matches my daily small-scale neural cell tests perfectly. I reordered twice already, every single vial has equal potency with zero batch inconsistencies. The gold cap stays airtight after dozens of needle punctures to block freezer moisture.
Maren Montgomery –
My multi-month chronic stress rodent trials rely on consistent peptide strength for reliable long-term tracking. Every new SK5 shipment matches past batches in purity and neural activity, so I don’t need to run extra control calibration tests between stock replenishments.
Soren Carter –
I restock SK5 monthly for 10 consecutive months, and it is my exclusive Selank source for all neuroprotection and stress regulation research. Reliable ≥99% HPLC purity, strict dark frozen storage guidelines, dual flexible vial sizes and consistent cross-batch performance fixed all unstable assay data issues I faced with cheaper competing peptide brands.
Dex Lynde –
I’ve restocked SK5 monthly for 10 consecutive months, exclusive Selank supplier for all neuroregulation and cognitive aging research. Consistent ≥99% purity, dual flexible vial sizes and uniform batch potency resolved all erratic, unreliable assay data from cheaper competing peptide brands.
Uriel A. –
I once mistakenly left a vial out at room temperature for 3 days, and the powder turned clumpy with poor solubility afterward. This really highlights how critical strict -20°C dark storage is to preserve the structural integrity of this Selank peptide.
Zora F. –
I compared Selank batches from multiple suppliers for comparative neurobiology trials, and this acetate lyophilized variant delivers superior solubility with minimal glass-wall adhesion. Slow gentle swirling fully solubilizes the powder; rough shaking will split the peptide chain and invalidate cell assay data.
Arlo G. –
The listed CAS number, molecular formula and 916.06 Da molecular weight match official biochemical reference databases perfectly. This research-grade peptide contains no inert bulking fillers or fragmented peptide fragments, and low-temperature dark storage prevents photo-oxidation of the Selank sequence.
Yves E. –
Two dosage options (5mg and 10mg per vial) cover all my research scales perfectly. The 5mg single vial size fits small preliminary cognitive screening experiments; I only reconstitute one vial per testing cycle to avoid wasting diluted Selank that quickly loses biological activity once mixed with solvent.
Blair H. –
Selank is my core raw material for anxiety, cognitive function and central nervous system pathway research. The built-in acetate buffer maintains a stable pH of 4.0–6.0 to slow peptide denaturation after reconstitution. All glass vials arrived fully intact without cracks or leaks during international lab shipping.
Marnie Oakley –
I run week-long refrigerated neural cell tests using mixed Selank liquid. As long as I cover diluted peptide from light, it stays clear and keeps full bioactivity for nearly seven days without sediment. Competitor Selank turns cloudy after only three days and requires daily remaking, wasting lots of lab stock.
Dora J. –
This SK5 Selank is sterile acetate-buffered white lyophilized peptide powder with HPLC purity ≥99%. Long-term storage requires sealed vials kept at -20°C and fully shielded from light and moisture. Dark frozen storage stabilizes its peptide chain completely, avoiding hydrolysis and potency loss for months of neuroregulation research storage.
Maren K. –
I perform random HPLC spot checks on every shipment batch, and every sample consistently hits ≥99% purity with no unknown impurity peaks on chromatograms. Complete purity certification is supplied with each order, which meets academic lab audit requirements.
Harlan Maeve –
I requested individual HPLC purity reports for every vial in my bulk pack, and support sent all certified chromatogram files within 24 hours. Every sample passes ≥99% purity with no unknown impurity peaks, fully meeting my university’s strict audit and research paper standards. Most competitors only provide one single certificate per full box.
Vera B. –
The optimized acetate buffer blend drastically reduces peptide residue stuck to the inner glass vial walls after dissolution. I recover nearly the full labeled 5mg lyophilized powder from each vial, eliminating major dosing inaccuracies in quantitative neurotransmitter regulation research.
Pearl I. –
The molecular weight and chemical formula match the specification sheet perfectly. This research-grade raw material contains no fillers or contaminants. As long as I strictly follow frozen storage and light shielding, biological activity never declines.
Jude Ross –
The 10-vial bulk sale pack drastically cuts my lab’s monthly peptide budget, much cheaper than buying single vials separately. Its steady 4.0–6.0 pH blends naturally with my serum-free cell media, so I skip extra pH adjustment steps before every test. Every glass bottle arrived fully intact with no cracks or leaks during overseas cross-border shipping.
Ford Sloat –
Gradient comparison trials use both 5mg and 10mg vials, purity stays consistent across sizes. Data collected from tiny dry powder samples align perfectly with full-vial reconstitution results, cutting hours of lab equipment recalibration work.
Cedric I. –
Every vial inside the 5mg×10 bulk kit holds fine uniform white lyophilized powder that dissolves rapidly into fully transparent particle-free liquid. The hermetic gold crimp cap locks out ambient humidity, so the powder never clumps even after repeated punctures to extract partial aliquots for neural cell testing.
Ione Coyle –
A new trainee misread storage rules and placed a vial in a frost-free freezer with constant temperature swings, causing permanent loss of biological activity. I posted clear handling guidelines above the peptide shelf to prevent repeat mistakes.
Blair Mays –
White lyophilized powder remains free-flowing over long freezer storage, no compact sediment buildup at vial bases. Sterile spatula dry micro-sampling halves monthly Selank raw material waste within our lab.
Finley Vale –
I study brain stress balance with cell cultures, SK5 Selank delivers consistent results I couldn’t get from cheaper impure brands. It’s above 99% pure so random impurities don’t mess up neuron test data. I store all vials locked away in dark -20°C freezers; light exposure quickly weakens its neural balancing effects. The white buffered powder dissolves totally with soft swirls, no sticky film left on glass.
Rian Niles –
Beyond rodent stress trials, I run primary cerebral neuron cell culture with SK5. Mild acetate buffer blends seamlessly with all serum-free neural media, cutting daily pre-test preparation time in half. Neural signaling results far more stable than cheap generic Selank.
Caspian Reed –
An intern left an unopened vial exposed under bench fluorescent lights for two days; follow-up cell testing showed a sharp drop in calming neural activity. After moving all SK5 stock into light-proof freezer bins, my experiment repeatability scores improved significantly.
Nora G. –
Every vial in the 10-vial kit has consistent potency and uniform powder texture. The lyophilized material dissolves fully into a crystal-clear solution with zero sediment. The airtight stopper keeps out humidity so there is no caking during long-term freezer storage.
Lydia Voss –
My long-term cognitive aging mouse trials run for multiple months, each new shipment matches prior batch purity and strength. Lyophilized powder stays loose with no hard clumping at vial bottoms. Tiny dry powder scrapes work for micro screening without dissolving the full 5mg vial.
Dexter Graft –
10-vial bulk packs drastically cut monthly lab peptide expenses. Stable 4.0–6.0 pH matches standard serum-free neural culture media, no extra buffer adjustment required. Foam-lined shipping packaging keeps all vials intact for overseas delivery.
Jared Pruitt –
My lab runs Selank dose-response neural signaling assays. Uniform cross-vial potency means no mid-experiment dosage adjustments. 10-unit bulk packs align perfectly with our lab’s monthly recurring testing cycles.
Celeste Hogue –
University research audits demand individual HPLC purity certificates for every single vial. Support sent complete certified chromatogram files within 24 hours, all samples hit ≥99% purity and removed redundant control validation tests.
Orin Mercer –
I conduct neural stress regulation cell testing. SK5’s ≥99% HPLC purity eliminates impurity noise disrupting neuron assay data. Must store sealed vials at -20°C away from light; bright lab lighting quickly weakens its neuroprotective effects. White acetate-buffered powder dissolves fully with zero glass wall residue.
Clay Boyd –
Sealed vials stored in dark constant -20°C cabinets for two months, powder remained bright white with zero discoloration. Post-test neural regulatory activity matched fresh stock completely. Old generic Selank yellowed and lost potency after only three weeks frozen storage.