research
Library
All 106 researched compounds. Filter by category, evidence tier, and regulatory status.
Tier 3
ARA-290 (Cibinetide)
ARA-290 is the connoisseur's pick of the healing category — the only one with human randomized-trial data and a defined receptor mechanism, which earns it unusual respect from the evidence-minded corner of the community.
Tier 3
BPC-157 Arginate Salt
BPC-157 arginate is a real formulation distinction (same peptide, arginine counterion, patent-backed gastric-stability rationale) wrapped in marketing that outruns its evidence — "1,000× more stable" claims have no peer-reviewed backing, and for injectable use the community consensus is that it offers nothing over acetate.
Tier 1
BPC-157
BPC-157 is the undisputed king of healing-peptide discourse — no other compound generates this volume of recovery anecdotes across Threads, Instagram, and Facebook groups.
Tier 1
GHK-Cu (injectable form)
GHK-Cu is the cosmetic darling of the healing category — hair and skin anecdotes are abundant and it anchors the GLOW triple stack — but injectable use is the least evidence-backed application of the five compounds here.
Tier 2
IGF-1 DES
IGF-1 DES is the connoisseur's IGF variant — less-discussed and lower-volume than LR3, but with a durable, decade-old community belief that it acts more locally and briefly, making it the preferred pick for the muscle just trained.
Tier 2
IGF-1 LR3
IGF-1 LR3 has one of the largest real-world evidence trails in the peptide gray market, but veteran consensus is that its muscle-mass payoff is modest — the value shows up in pumps, recomposition, and faster recovery from soft-tissue injuries.
Tier 2
KPV
KPV is the thinking person's anti-inflammatory peptide — the preclinical mechanism (NF-kB via melanocortin signaling, PepT1 gut absorption) is unusually well-articulated for a gray-market compound, and the MCAS/gut/skin niches report genuinely encouraging anecdotes.
Tier 2
LL-37 (Human Cathelicidin Antimicrobial Peptide)
LL-37 is the healing track's infection-and-wound specialist: genuine biohacker enthusiasm grounded in real antimicrobial and wound-healing literature, but the community conversation stays appropriately cautious — it's discussed as an infection-specific tool with pro-inflammatory edge cases, not a general recovery peptide, and the human evidence remains early.
Tier 2
MGF (Mechano Growth Factor)
Plain MGF is the budget, old-school entry in the recovery-growth space with a real rodent literature behind it and a loyal anecdotal user base that values post-workout localized use and lower cost — but its reconstituted fragility is the one thing believers and skeptics agree on.
Tier 2
PEG-MGF
PEG-MGF is the most divisive item in this batch: a decade-plus of forum argument has never settled whether pegylation improved or ruined the molecule, with advocates praising systemic rest-day recovery and detractors calling it overpriced and under-delivering versus plain MGF.
Tier 2
Pentosan Polysulfate Sodium
Pentosan is the veteran of the healing track that isn't a peptide at all: the veterinary world treats it as a standard osteoarthritis tool, and a niche of experienced biohackers ranks it above BPC-157/TB-500 for stubborn joint degeneration — with the persistent caveat that human injectable supply is prescription-gated, expensive, and increasingly squeezed by regulators.
Tier 1
TB-500 (Thymosin Beta-4 fragment)
TB-500 is the systemic partner everyone pairs with BPC-157 — community consensus is the combination outperforms either alone for injury recovery, and anecdotal recovery timelines of 3–4 weeks are reported consistently.
Tier 2
Thymosin Beta-4 (Full-Length, 43-AA)
Full-length thymosin beta-4 is the molecule with the real (if limited) human clinical record, but the community barely buys it as such — it talks about "TB-500," and gray-market labeling blurs the two into one SKU.
Tier 1
BPC-157 + TB-500 Blend ("Wolverine Stack")
The Wolverine stack is the community's default recovery protocol with a genuinely large, enthusiastic — but entirely uncontrolled — experience record, and the blend format is convenient yet increasingly treated with suspicion by experienced users over ratio control, stability, and QC risk.
Tier 3
Alexamorelin
There is no community around Alexamorelin — it is a regulatory ghost, named only on doping lists.
Tier 2
CJC-1295 (with DAC)
CJC-1295 with DAC is the legacy long-acting form the community has largely moved past: convenient weekly dosing, but its sustained GH elevation drew the most prominent safety anecdote of 2026 (Johnson's biomarker worsening) and recurring glucose/water-retention complaints.
Tier 1
CJC-1295 (no DAC) + Ipamorelin — the stack
The CJC-1295/Ipamorelin stack is the default GH protocol of the 2026 peptide scene — endorsed from clinical-promotional carousels to FB group threads — because it delivers the most-cited sleep and recovery improvements at a fraction of HGH's cost, through a dual-receptor mechanism the community understands well.
Tier 1
CJC-1295 (no DAC) / Mod GRF 1-29
CJC-1295 no DAC plus Ipamorelin is the community's default GH-secretagogue stack for sleep, recovery, and body recomposition, with strong anecdotal reporting and one of the most developed crowdsourced dosing consensuses in the peptide scene.
Tier 1
GHRP-2 (Pralmorelin)
GHRP-2 is treated as a legitimate legacy secretagogue — respected for its potency edge over GHRP-6 and lower appetite effect, but largely passed over in 2026 content in favor of ipamorelin, which avoids the cortisol/prolactin baggage.
Tier 2
GHRP-6
GHRP-6 is the respected-but-superseded elder of the GHRP family: its appetite stimulation still earns bulking-phase endorsements ("got me huge"), but its cortisol/prolactin baggage and hunger have made ipamorelin the default selective choice, and some creators now call it outright outdated.
Tier 1
Hexarelin (Examorelin)
Hexarelin carries the "most potent GHRP" crown in community lore and in the vendor content that profits from it, but the consensus is that the crown is expensive: documented desensitization, cortisol/prolactin elevation, and short-cycle-only use keep it as a niche heavy hitter rather than a daily driver.
Tier 1
Ipamorelin
Ipamorelin is the community's preferred GHRP precisely because it is the selective one: the clean-pulse reputation (no cortisol/prolactin crosstalk) survived every comparison against GHRP-2/6 and hexarelin, and its pairing with CJC-1295 no DAC became the default stack.
Tier 1
MK-677 / Ibutamoren
MK-677 is the peptide scene's oral shortcut: unmatched discussion volume, genuine appeal (no needles, real appetite and sleep effects), and the worst signal-to-noise ratio in the category — every thread is part testimonial, part diabetes warning, part supplier spam.
Tier 1
Sermorelin
Sermorelin is the community's "safe, gentle, grandfathered" GH peptide — valued for its real clinical history and sleep benefits, and favored for older adults — but consistently ranked the weakest of the GHRH options, with most experienced users recommending it be stacked with a GHRP rather than run alone.
Tier 2
Somatropin (recombinant human GH)
Somatropin is the yardstick, not the contender: everything in this track is measured against direct GH, and the community's verdict is consistent — HGH works more directly but costs an order of magnitude more, carries heavier metabolic and legal baggage, and the black-market supply is a counterfeit minefield.
Tier 1
Tesamorelin
Tesamorelin is the community's most credentialed GH secretagogue — real FDA approval, real Phase III fat-loss data — and its "visceral fat peptide" reputation is actively debated as a labeling artifact versus a genuine mechanistic edge over cheaper CJC-1295.
Tier 3
AOD-9604
AOD-9604 is the peptide world's cautionary classic: one of the most talked-about fat-loss peptides, yet the conversation skews heavily toward frustration — half the users see little, reconstitution is a running joke ("look at it wrong?
Tier 3
Cagrilintide
Cagrilintide lives in the peptide world's future tense: it is one of the most discussed amylin-pathway compounds, almost entirely through CagriSema trial readouts and rankings rather than anyone's own vial.
Tier 3
CagriSema — Metabolic & Weight Loss Deep Research
CagriSema carries the strongest mechanism story in the late-stage obesity pipeline — amylin plus GLP-1 produced the best phase 3 weight-loss figures short of tirzepatide — but the visible community has already priced in disappointment after two readouts missed the ~25% hype number and the head-to-head loss to tirzepatide.
Tier 3
Humanin — Research Dossier
Humanin is a niche mitochondrial peptide with a real but narrow following in longevity and biohacker circles — a practitioner's rotation-list item, not a mainstream peptide.
Tier 2
Liraglutide — deep research file
Liraglutide is the affordable workhorse GLP-1: groups confirm it's still being started today, valued for its coverage-friendly price point and long safety record, but the daily shot and weaker weight loss (~8 kg mean in SCALE vs 15%+ on the weeklies) make it a second-line or budget option, not a destination.
Tier 3
MOTS-c
MOTS-c is the most scientifically interesting peptide in this category — real mechanism (mtDNA-encoded, folate–AICAR–AMPK axis), real Phase 1 human data via its CB4211 analog — but its community footprint is thin: no Facebook Group presence and only sparse Threads discussion, with the loudest current voices being TikTok explainers and vendor-affiliated blogs.
Tier 2
Orforglipron (brand name Foundayo) — Metabolic & Weight Loss
Orforglipron/Foundayo is the weight-loss community's most-discussed oral GLP-1 precisely because it removes the friction that kept people off injectables — a daily pill with no food or water rules and published Phase 3 data showing ~12% average weight loss.
Tier 3
Pemvidutide (ALT-801)
Pemvidutide is the peptide world's "interesting on paper" candidate: respected for best-in-class liver-fat and lipid data with unusually clean tolerability, but the community conversation is almost entirely theoretical — affinity charts, trial readouts, and stock-chart jokes.
UNVALIDATED
Pramlintide (Symlin®)
Pramlintide is the respected elder of the amylin class: modest, well-documented weight loss and real insulin-sparing effects, but the pre-meal injection timing, early nausea, and severe hypoglycemia risk with insulin keep it a diabetes-clinic drug rather than a biohacking staple.
Tier 2
Retatrutide
Retatrutide earns its "triple-G" reputation: trial data (−28.3% at 12 mg over 80 weeks) and a flood of self-reported transformations make it the consensus most-effective weight-loss compound in the peptide space.
Tier 2
Semaglutide
Semaglutide is the reference standard of the GLP-1 era: the one with the deep trial program (STEP), the hard outcomes (SELECT, FLOW), and the largest real-world user base — and the community treats it as such, with practical titration wisdom rather than hype.
Tier 3
SLU-PP-332
SLU-PP-332 is 2026's favorite exercise-mimetic story: the mouse data is genuinely striking and the "exercise in a pill" framing travels well on Threads and Reddit.
UNVALIDATED
Survodutide (BI 456906)
Survodutide has earned a genuine cult following among dual-agonist experimenters as the "cleaner" retatrutide alternative — prized for liver-fat data and a reputation for less heart-rate elevation.
Tier 2
Tirzepatide — Deep Research (Metabolic & Weight Loss)
Facebook communities and Drugs.com reviewers broadly rate tirzepatide as the most effective current weight-loss medication, with the appetite/"food noise" effect described as life-changing by many; GI side effects — especially nausea, sulfur burps, and diarrhea — are common, dose-related, and the main reason people quit or refuse dose increases.
Tier 3
Adamax — Deep Research (Cognitive & Nootropic)
Adamax is a frontier SKU riding Semax's reputation with thinner evidence, thinner discussion, and a vendor identity problem — sellers don't agree on what molecule they're selling.
Tier 1
Cerebrolysin
Cerebrolysin is the category's heavyweight: the only item with real pharmaceutical manufacturing, randomized trial evidence, and a large polarized user base reporting both meaningful recovery effects and real adverse events.
Tier 2
Cortexin
Cortexin is a legitimate, long-registered Russian neurotrophic drug with essentially no English-language community footprint: no hype, no complaint threads, no dosing lore surfaced in this session.
Tier 3
Dihexa — Deep Research (Cognitive & Nootropic)
Dihexa is the category's highest-ceiling, lowest-floor bet: a genuinely interesting preclinical synaptogenic mechanism (picomolar HGF/c-Met activity, BBB penetration) wrapped in zero human data, a split anecdote record (weeks-to-benefit vs. mood-swing discontinuation), and a theoretical cancer-pathway question nobody can answer.
Tier 3
FGL Peptide — Deep Research (Cognitive & Nootropic)
FGL is the category's museum piece: a beautiful preclinical mechanism (LTP, synaptic plasticity, neuroprotection in rodents) with one decade-old anecdote and no human data whatsoever.
Tier 3
N-Acetyl Selank — Deep Research (Cognitive & Nootropic)
Almost nobody in the community discusses this analog on its own merits — the Selank conversation is overwhelmingly about the native molecule.
Tier 3
N-Acetyl Semax (NA-Semax) — Deep Research (Cognitive & Nootropic)
NA-Semax is the community's "smoother Semax" — chemically plausible longer action, a real anecdote trail, and a consistent reputation for being subtler and less edgy than the base molecule.
Tier 2
Noopept — Deep Research (Cognitive & Nootropic)
Noopept is the category's honest workhorse: cheap, widely tried, genuinely split in outcome.
Tier 3
P21 (P-21 / P021)
P21 sits at the speculative edge of the category: a genuinely interesting preclinical neurogenic mechanism (CNTF-fragment, LIF inhibition) wrapped in zero human data and explicit community caution.
Tier 3
PE-22-28 — Deep Research (Cognitive & Nootropic)
PE-22-28 is the category's purest "mechanism story" stock: a crisp, well-documented preclinical rationale (TREK-1 inhibition at 0.12 nM, spadin lineage, rodent antidepressant behavior) with essentially no human community behind it yet.
Tier 3
Pinealon — Deep Research (Cognitive & Nootropic)
Pinealon is the category's quiet bioregulator: consistent identity, mid-range pricing, a small sincere anecdote lane (sleep, mood, clarity), and no human data whatsoever.
Tier 2
Selank — Deep Research (Cognitive & Nootropic)
Almost nobody in the community discusses this analog on its own merits — the Selank conversation is overwhelmingly about the native molecule.
Tier 1
Semax — Deep Research (Cognitive & Nootropic)
NA-Semax is the community's "smoother Semax" — chemically plausible longer action, a real anecdote trail, and a consistent reputation for being subtler and less edgy than the base molecule.
Tier 3
Acetyl Tetrapeptide-3 (Capixyl)
Capixyl is the most socially real of the hair-peptide complexes and the most honestly scoped by its own community: Tressless regulars will grant it reduced shedding and better-looking hair while refusing — correctly — to call it regrowth.
Tier 1
Argireline (Acetyl Hexapeptide-8)
Argireline is the most honestly priced experiment in cosmetic peptides: at ~$10, even skeptics consider The Ordinary's solution a reasonable trial, and some users do report visible softening of expression lines.
Tier 3
Biotinoyl Tripeptide-1 (Widelash / Procapil component)
Biotinoyl Tripeptide-1 is a supporting actor with a surprisingly honest press record: reviewers who disclose affiliates still tell you it takes months and regrows nothing dramatic.
Tier 1
GHK-Cu (Copper Tripeptide)
GHK-Cu is the most socially validated cosmetic peptide in this set: real users report visible skin improvement on a weeks-to-months timeline, and a large bloc of dermatologists engages with it seriously as a topical.
Tier 3
Hexapeptide-11
Hexapeptide-11 is a passenger, not a driver: it rides inside good moisturizers and gets none of the credit and none of the blame.
Tier 2
Matrixyl 3000 — Palmitoyl Tripeptide-1 + Palmitoyl Tetrapeptide-7 Combo
Matrixyl 3000 is the Matrixyl the community actually talks about in 2026 — carried by genuine neck-wrinkle testimony on Threads, K-beauty retinal combos, and a wave of paid FCL reels — but the paid-to-organic ratio is lopsided: the loudest buzz is affiliate marketing, and the sharpest voices (Cynthia Garcia's FB reel) endorse it only "with an asterisk" because every impressive number traces back to Sederma's own data.
Tier 2
Matrixyl (Palmitoyl Pentapeptide-4) — Classic Cosmetic Anti-Wrinkle Peptide
Matrixyl is the boring, reliable elder of cosmetic peptides: verified buyers repurchase it for its gentleness, affordability, and a subtle plumping effect — while honest reviewers admit most of what they see could be hydration.
Tier 3
Myristoyl Pentapeptide-17 (SymPeptide XLash)
Myristoyl Pentapeptide-17 is the lash world's honest Rorschach test: the same INCI produces raves and shrugs, and the best reviewers admit they cannot separate it from the formulas it ships in.
Tier 3
Nonapeptide-1 (Melanostatine-5)
Nonapeptide-1 is a real cosmetic ingredient with a real but thin evidence footprint: the people who actually used it (retail reviewers) report slow, modest brightening and complain about price.
Tier 3
Oligopeptide-1 (EGF — Epidermal Growth Factor)
Oligopeptide-1/EGF is the most socially alive item in this recovery set and the most scientifically awkward: users see overnight cosmetic effects, but the 53-amino-acid elephant in the room is whether any of it gets past the barrier — and the most careful reviewers say so openly.
Tier 2
Palmitoyl Tripeptide-1
Palmitoyl Tripeptide-1 is one of the few cosmetic peptides with genuine, multi-year social staying power: 93 posts across three platforms, a clinician explaining its signal-peptide mechanism to an engaged audience, and a 124-like consumer review praising real-world wearability.
Tier 2
Palmitoyl Tripeptide-38 (Matrixyl synthe'6)
Matrixyl synthe'6 is the Matrixyl everyone buys but nobody debates: estheticians champion its six-component matrix story, Timeless buyers rate it 4.9 stars in the thousands, and it's quietly half of the best-selling budget peptide serum — yet almost no one discusses it on its own, and its headline numbers (21% volume, 19% depth) are brand-quoted manufacturer data that the community's skeptics keep politely asterisked.
Tier 2
SNAP-8 (Acetyl Octapeptide-3)
SNAP-8 is the quieter sibling of Argireline with a louder vendor bullhorn: the mechanism story (SNARE interference, "Botox in a bottle") is compelling and literature-backed in vitro, but independent user evidence in 2026 is thin and the information environment is dominated by research-chemical sellers.
Tier 3
Alloferon
Alloferon's story is compelling on paper — insect immune peptide → registered antiviral drug — but in 2026 it exists in English-language social spaces as a curiosity, not a movement.
Tier 2
Epithalon
Epithalon is the longevity half of this track's biggest viral story — huge reach, thin ownership.
Tier 3
Gepon
Gepon is a "patient-forum peptide" — its only real Western discussion lives in chronic-illness forums, not peptide social.
Tier 3
Imunofan
Imunofan is the invisible drug — a registered, industrially produced immunomodulator that the entire Western peptide conversation ignores.
Tier 2
KPV
KPV is 2026's rising anti-inflammatory staple: credible mechanistic story (PepT1/NF-κB), enthusiastic GI/skin anecdotes, and genuine regulatory momentum from the July 2026 PCAC 8–6 compounding vote — but zero human clinical trials, a loud cautionary minority (dermatologist personal trial: "neither benefit nor harm"), and comment sections dominated by sourcing questions and vendor spam rather than evidence.
Tier 1
LL-37
LL-37 is the mold/Lyme/biofilm community's most hyped antimicrobial peptide, with real owner experimentation (folliculitis, sinus, colds) and educator reels driving demand — but the same threads carry the loudest safety counter-chorus of any peptide in this track: mast cell activation, autoimmune contraindications, and bleeding reports.
Tier 2
Thymalin
Thymalin's 2026 moment is entirely the viral Russian-protocol story — a simple 20-day annual course with a 40-year Russian clinical backstory that Western audiences find compelling.
Tier 3
Thymogen
Thymogen is a footnote in Western peptide culture — known to Khavinson enthusiasts, owned by almost no one.
Tier 3
Thymopentin
Thymopentin is the "approved drug nobody talks about" — an actual China-approved immunomodulator with a real clinical record, but effectively absent from Western peptide social culture.
Tier 1
Thymosin Alpha-1 (TA1 / Thymalfasin)
Thymosin Alpha-1 is the immune category's consensus "safest, most-studied" pick, with genuine pharma history (35+ countries) that no other peptide in this track can claim.
Tier 3
Vilon
Vilon is a genuine but niche corner of the bioregulator world: the Khavinson lineage and the dipeptide's epigenetic story (SIRT1/PARP data, chromatin interaction) give it real intellectual scaffolding, and Russian pharma registration sets it apart from pure research chemicals — but the Western social footprint is almost entirely vendor/educator infographics, not owner experience, and the most honest vendor-educator (Peptara Labs) flags both the transgenic-mouse tumor signal and the absence of human RCTs.
Tier 2
VIP (Vasoactive Intestinal Peptide)
VIP is the insider's immune peptide — loved by the CIRS crowd and featured on a major cheat sheet, but barely discussed as a product anywhere else.
Tier 2
Cerluten (A-5) — CNS / Brain Peptide Bioregulator
Cerluten is one of the most consistently stocked and promoted Khavinson brain bioregulators, with genuine owner-level presence on Instagram and Threads (notably Russian/Kazakh buyers showing real boxes) and a growing US longevity-coach audience bundling it into phased protocols.
Tier 3
Endoluten
Endoluten is the Khavinson line's prestige pineal product: the priciest standard bioregulator, bought on the "master regulator" narrative by committed bioregulator users.
Tier 3
Epithalamin
Epithalamin exists in the shadow of its synthetic child: the community's real discussion is about the confusion between the two.
Tier 2
Epithalon (Epitalon, AEDG)
Epithalon is the longevity community's most storied telomere peptide: the sleep and circadian benefits are the most consistently reported real-world effects, while the lifespan claims rest on animal data and one debated human observational dataset.
Tier 3
FOXO4-DRI
FOXO4-DRI is the senolytic peptide with the cleanest mechanism on paper and the thinnest real-world footprint: admired by biohacker curators, priced out of casual experimentation, and entirely without human data.
Tier 2
Humanin
Humanin is the quiet protector of the MDP family: the most naturally-occurring-feeling peptide in this category, with genuine neuroprotective science and genuine practitioner use, but the least community noise.
Tier 2
MOTS-c
MOTS-c is the people's mitochondrial peptide: genuinely used, genuinely discussed, with a real mechanism and real preclinical data — but zero human efficacy proof and a reputation for painful injections.
Tier 3
Ovagen
Ovagen is the liver entry of the Khavinson shelf: chemically defined, commercially available in two parallel markets (vials and capsules), and essentially absent from open English-language community discussion.
Tier 3
Prostatilen
Prostatilen is the category's odd one out: an actual prostate peptide medicine with decades of home-market use, bought mainly by diaspora buyers who know it from Russian urology.
Tier 3
SHLP-6 (Small Humanin-Like Peptide 6)
SHLP-6 barely registers as a community peptide at all — it lives in catalogs, not in protocols.
Tier 2
SS-31 (Elamipretide, MTP-131, Bendavia)
SS-31 is the "serious" mitochondrial peptide — real drug-development pedigree and the clearest mechanism in the category — but that legitimacy comes with real-drug downsides: frequent injection-site reactions, premium pricing, and demanding dosing.
Tier 3
Testoluten
Testoluten is the men's-health staple of the Khavinson line: a real, long-sold testes bioregulator bought mainly as part of the A-13/A-16/A-17 stack.
Tier 3
Vezugen
Vezugen is the vascular entry in the Khavinson bioregulator shelf: a real defined tripeptide with a plausible endothelial story and a functioning multi-vendor market, but essentially no open-community experience reports in English-language biohacker spaces.
Tier 3
Desmopressin (DDAVP / Minirin)
Desmopressin has no standing as a biohacker peptide in 2026: the peptide and biohacking groups searched contain zero discussion of it, Threads carries no experience content, and all social signal is clinical education plus a genuine 2026 drug-shortage story in Canada.
Tier 3
DSIP (Delta Sleep-Inducing Peptide)
DSIP has a genuine but small 2026 footprint centered on Threads, where a verified user's detailed sleep-recovery story drew real engagement, and on bodybuilding forums where opinion splits cleanly between "it either sucks or it's great."
Tier 3
Epithalon
Epithalon is longevity culture's favorite mechanism story in search of an outcome: the telomerase narrative is compelling, the Khavinson lineage is genuinely interesting, the price is low — and the human evidence is missing.
Tier 3
Gonadorelin
Gonadorelin is better marketed than it is discussed: clinics push it to TRT users, vendors stock it cheaply, but the organic owner conversation is nearly invisible.
Tier 2
HCG (Human Chorionic Gonadotropin)
HCG is the most *consequential* item in this track: the TRT-fertility discussion is detailed, semen-analysis-grounded, and practically oriented in a way nothing else here matches.
Tier 2
Kisspeptin-10
Kisspeptin-10 has real upstream biology and genuine curiosity behind it — especially the PT-141 pairing frame for women's libido — but the community's dominant note is skepticism: the short half-life criticism appears in nearly every serious discussion, experience reports are scarce relative to promotional content, and no Facebook-group dosing culture was observed.
Tier 3
Melanotan I (Afamelanotide)
Melanotan I is the "responsible sibling" in name only: the community barely discusses it as a distinct product, the MT-II confusion drowns out whatever signal exists, and its main real-world footprint is vendor catalogs trading on the afamelanotide name.
Tier 3
Melanotan II Nasal Spray
The nasal spray is the format the market wants to sell and buyers can't reliably buy: thin social proof, worse unit economics than vials, persistent stock problems, and background skepticism about whether it works at all.
Tier 2
Melanotan II
Melanotan II is the category's lightning rod: it has the most users, the most lore, the most dramatic before/after content — and the most polarized safety debate.
Tier 2
Oxytocin
Oxytocin has the trend energy — "sexmaxxing" and the PT-141 pairing gave it the most distinctive 2026 narrative in the niche track — but the evidence base is lopsided: journalism and clinic marketing on one side, thin owner reporting on the other.
Tier 3
Pinealon
Pinealon is the track's ghost item: a real product with real vendors and essentially no community.
Tier 1
PT-141 (Bremelanotide)
PT-141 is the most socially validated libido peptide in this track: physician explainers, owner testimonials, and Facebook group dosing threads all agree it acts on desire centrally and can work well — but the nausea/flushing tax is real and widely reported, with roughly the FDA trial profile (nausea ~40%, flushing ~20%) echoed in community anecdotes.
Comparison matrices
Healing & Recovery — Category Comparisons
Track: Healing & Recovery peptides Research date: 2026-09-20/21 Items: 14 All prices observed 2026-09-20 unless noted. Per-item dossier files for this category are included in the research library. Not medical advice. Research documentation only; none of these products are approved for human use.
GH Secretagogues — Category Comparisons
Substitution log: The brief's target list included both "GHRP-2" and "Pralmorelin" as separate items. Pralmorelin is the INN for GHRP-2 (verified via Wikipedia/BenchChem, 2026-09-20) — the same compound.
Metabolic & Weight Loss — Category Comparisons
Research completed 2026-09-21 · 14 items · 58 verified real images · All prices observed 2026-09-20 unless otherwise noted.
Cognitive & Nootropic — Category Comparisons
Compiled 2026-09-21 from the 13 per-item research files in this directory. All prices observed 2026-09-20/21; all tiers per the validation contract (Tier 1 = Facebook Groups + Instagram owner content + Threads; Tier 2 = strong independent evidence on two of the three; Tier 3 = single-platform/weak signal, explicitly flagged; UNVALIDATED = minimum bar not met).
Skin, Hair & Cosmetic — Category Comparisons
Category: Skin, Hair & Cosmetic peptides · Research dates: 2026-09-20 (8 items) / 2026-09-21 (6 items) · Items: 14 · Images: 80 verified real photos
Immune & Antimicrobial — Category Comparisons
Twelve peptides, one track: thymic bioregulators, antimicrobial peptides, and the 2026 viral Russian-protocol pair. Research year 2026; all prices observed 2026-09-20 unless marked UNVERIFIED.
Longevity & Mitochondrial — Category Comparisons
13-peptide deep-research comparison for the 106-peptide project. Individual reports live in this directory; image files in img/. All prices observed 2026-09-21; all claims evidence-tagged with UNVERIFIED where applicable.
Libido, Tanning, Sleep & Niche — Category Comparisons
Track: 13 items · Research date: 2026-09-20 · Report index at bottom