Comprehensive, unbiased analysis of the most studied peptide compounds. Each review is grounded in published research — not hype. We earn a small commission on purchases, which funds our independent work.
We independently evaluate peptide suppliers on purity documentation, third-party testing, shipping reliability, customer support, and pricing. Ratings reflect our team's ongoing testing — not paid placements.
Colorado-based Mile High Compounds is one of the most Trustpilot-reviewed suppliers in the category — 360+ reviews averaging 5 stars. All peptides are sourced from US-based, cGMP-certified, FDA-audited manufacturers and undergo rigorous independent testing for heavy metals, endotoxins, sterility, and variance. Owner Max is personally known and respected in the community for hands-on education and support. Same-day shipping. Peptide Critic-verified.
Glow Aminos markets to a wellness-adjacent research audience and prominently advertises third-party testing, secure payment, and same-day shipping (orders placed before 6pm ET). Their branding is consumer-forward compared to clinical competitors. They require account creation for browsing — citing payment processing compliance — but their landing page is transparent about this requirement and their verification process.
EZ Peptides is a US-lyophilized research peptide supplier with third-party COA testing through Janoshik — one of the most respected independent peptide testing labs. Open shop, no account wall for browsing. Catalogue covers single vials, kits, and blends including a Deadpool Blend (BPC-157 + TB4 + Cartalax), and their proprietary EZP-3P (Retatrutide). Oral capsule options available. 3-minute average support response time. Founded 2022.
Flawless Compounds is a research peptide supplier focused on purity, secure payment, and fast fulfilment. Every product is independently third-party tested for purity, safety, and consistency. They offer same-day shipping on orders placed before 6pm ET and support social login (Google, Facebook, Microsoft) for streamlined account creation. Clean branding with a straightforward checkout experience and responsive support team.
USA-sourced, USA-tested supplier with 15,000+ active researchers in their community. Every batch undergoes rigorous third-party testing for identity, purity, and safety with results published on a dedicated COAs page. Products are vacuum-sealed for optimal storage integrity. Top sellers include Retatrutide ($95–$300), Tirzepatide ($85–$325), NAD+ (500mg–1000mg), and BAC water.
Badger Compounds is a US-based research peptide supplier built around a simple promise — purity you can prove. Every compound is manufactured in cGMP-certified facilities, tested to cGLP standards, and verified by accredited third-party US laboratories. Six independent tests per batch covering identity, purity, net content, endotoxins, and sterility. A 99% purity guarantee backs every order: if any batch tests below 99%, they refund. Full COA library on-site. Research Library included. 21+ age verified.
Proxiva Labs offers a bold 99.99% purity claim backed by GMP-certified lab sourcing, third-party testing, and a prominently published COA library. They openly advertise 30% off sales, have an active Twitter presence, and their catalogue includes BPC-157, Semaglutide, Tirzepatide, and Retatrutide. A built-in peptide calculator and blog-style research content round out a professional, transparent site. 10% first-order discount popup available.
Soma Chems is a US-based research peptide and amino acid supplier formerly operating as Amino Asylum — one of the longest track records in the category. Every batch is independently tested for identification, concentration, purity, and transparency. Catalogue spans peptides, amino acids, and SARMs. Community reviewers consistently highlight fast delivery, quality consistency, and knowledgeable support. UPS shipping can occasionally run slower than competitors.
Holas is a research peptide supplier delivering USP grade, sterile-handled, batch-tested compounds to laboratories and academic institutions. Every peptide undergoes independent third-party testing for purity, identity, and batch consistency. Their catalogue covers popular singles (BPC-157, CJC-1295, GHK-Cu, TB-500), research blends (BPC/TB500), and a strong bundle range including the Research Foundation Stack, Glow Stack, Recomp Stack, Restore Stack, and Vitality Stack. Lyophilized for stability and long-term storage.
Veteran-owned, US-based licensed research peptide distributor with one of the most diverse format ranges in the category — vials, tablets, creams, and hair products alongside standard peptide lines. Top catalogue items include GLP-3R, CJC-1295 + Ipamorelin combo, and a growing GLP-1 range. They offer an affiliate programme, a military and first responder discount, and a dedicated customer reviews page. Active blog and clean WordPress-based storefront.
BPC-157 is a synthetic pentadecapeptide (15 amino acids) derived from a protective protein found in gastric juice. It has demonstrated remarkable wound-healing and tissue-regenerative properties across dozens of animal studies — making it one of the most-studied peptides in sports recovery research.
A synthetic version of a naturally occurring peptide that promotes cell migration and differentiation. Extensively studied for its role in tissue repair, particularly in cardiac and skeletal muscle recovery models.
A growth hormone releasing hormone analogue with an extended half-life due to Drug Affinity Complex (DAC) technology. Research shows sustained GH pulse elevation in animal models, with implications for body composition and metabolism studies.
Developed in Russia as an ACTH analogue, Semax is a heptapeptide with well-documented nootropic and neuroprotective effects in animal and limited human research. Shown to increase BDNF expression in the hippocampus in rodent studies.
A tetrapeptide studied for its telomere-lengthening properties and anti-aging potential. Research from the St. Petersburg Institute of Bioregulation has documented life-extension effects in animal models spanning several decades of longitudinal study.
A mitochondrially encoded peptide that regulates metabolic homeostasis by targeting the folate cycle and de novo purine synthesis. Emerging research links it to insulin sensitivity, exercise mimicry, and potential implications in metabolic disease models.
A naturally occurring copper complex with documented roles in wound healing, skin remodeling, and anti-inflammatory signaling. Research shows it upregulates collagen synthesis and activates over 4,000 genes linked to tissue repair and renewal pathways.
A selective growth hormone secretagogue peptide with a clean pulse profile. Unlike other GHRPs, Ipamorelin does not significantly stimulate cortisol or prolactin release, making it one of the most studied selective GH-release agents in preclinical research.
A GLP-1 receptor agonist with the most robust clinical evidence of any peptide in this category. Originally developed for type 2 diabetes, it has become the subject of extensive obesity research due to its effects on appetite regulation, gastric emptying, and energy homeostasis.
The first dual GIP and GLP-1 receptor agonist studied in metabolic disease and obesity models. Clinical trial data has shown superior weight reduction outcomes versus semaglutide alone, representing the next generation of metabolic peptide research.
A hexapeptide that stimulates GH release via ghrelin receptor activation. Research has demonstrated strong GH pulse amplification, appetite stimulation, and hepatoprotective properties in rodent models. A classic in GH secretagogue research.
A modified fragment of human growth hormone (hGH 177-191) specifically engineered to target lipolysis without the anabolic or insulin-desensitizing effects of full-length GH. Australian Phase II trials studied its application in obesity treatment.
A 21-amino-acid mitochondrially encoded peptide identified in the 16S rRNA gene. Research implicates it in Alzheimer's protection, insulin sensitivity modulation, and cellular stress response. Plasma levels decline with age, raising interest in longevity research contexts.
The most advanced metabolic peptide currently in clinical research — Retatrutide is a triple agonist targeting GIP, GLP-1, and glucagon receptors simultaneously. Phase 2 trial data published in the New England Journal of Medicine showed up to 24% body weight reduction at 48 weeks, outperforming all predecessors. Its glucagon component adds direct fat-burning and energy expenditure effects not seen in dual agonists.
A D-retro-inverso peptide designed to disrupt the FOXO4–p53 protein interaction that keeps senescent cells alive. Published research in Cell (2017) demonstrated selective clearance of senescent cells in mouse models, improving physical fitness, fur density, and renal function. One of the most compelling senolytic compounds in preclinical longevity research.
A mitochondria-targeted tetrapeptide that selectively concentrates in the inner mitochondrial membrane, where it stabilizes cardiolipin and improves electron transport chain efficiency. SS-31 has shown strong preclinical results in models of heart failure, ischemia-reperfusion injury, and age-related mitochondrial dysfunction. One of the most clinically advanced mitochondrial peptides, with Phase II human trials completed.
A naturally occurring neuropeptide and potent activator of the HPG (hypothalamic-pituitary-gonadal) axis. Kisspeptin-10 is the bioactive C-terminal fragment of the KISS1 gene product and acts as the primary upstream regulator of GnRH pulsatility. Research covers applications in reproductive endocrinology, LH/FSH pulsatility, testosterone regulation, and libido-related signaling pathways. Has reached human clinical trials for hypogonadotropic hypogonadism.
A synthetic small-molecule quinolinium compound that selectively inhibits the enzyme nicotinamide N-methyltransferase (NNMT). By blocking NNMT, it preserves nicotinamide for NAD+ synthesis and modulates SAM-dependent methylation — resulting in measurable effects on fat cell signaling, energy metabolism, and mitochondrial function in preclinical models. Research interest has grown significantly alongside NAD+ and metabolic longevity research trends.
A synthetic analogue of the human tetrapeptide Tuftsin, Selank has been studied for anxiolytic and nootropic effects without the sedative profile typical of benzodiazepines. Russian clinical research has examined its use in generalized anxiety disorder.
| Peptide | Category | Evidence | Min. Purity | Half-life | Oral Stable | Score |
|---|---|---|---|---|---|---|
| BPC-157 | Recovery | 97% | ~4h (SC) | ✓ | 9.2 | |
| TB-500 | Recovery | 95% | Days | — | 8.5 | |
| CJC-1295 | Longevity | 98% | 6–8 days | — | 8.1 | |
| Selank | Cognitive | 96% | ~1h | ✓ | 8.0 | |
| Semax | Cognitive | 96% | ~15–30m | ✓ | 7.9 | |
| Epithalon | Longevity | 99% | ~30m | ✓ | 7.7 | |
| MOTS-c | Research | 94% | ~1–2h | — | 7.2 | |
| GHK-Cu | Longevity | 98% | ~2–4h | ✓ | 8.8 | |
| Ipamorelin | Hormone | 97% | ~2h | — | 8.4 | |
| Semaglutide | Weight Loss | 99% | ~7 days | — | 9.1 | |
| Tirzepatide | Weight Loss | 98% | ~5 days | — | 9.0 | |
| GHRP-6 | Hormone | 96% | ~15–30m | — | 8.7 | |
| AOD-9604 | Weight Loss | 95% | ~30m | ✓ | 7.8 | |
| Humanin | Longevity | 95% | ~1h | — | 7.0 | |
| Retatrutide | Weight Loss | 98% | ~6 days | — | 9.3 | |
| FOXO4-DRI | Longevity | 97% | ~1–2h | — | 8.4 | |
| SS-31 | Longevity | 97% | ~1–2h | — | 8.6 | |
| Kisspeptin-10 | Hormone | 97% | ~15–30m | — | 8.3 | |
| 5-Amino-1MQ | Weight Loss | 97% | ~2–4h | ✓ | 7.8 |