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Research guides · 23 compound categories

Long-form research.
Mechanism · administration · safety.

Per-category guides covering mechanism, administration methods, protocols, key studies, expected outcomes, and safety. Each guide is editorial and conservative — claims trace to peer-reviewed publications cited inline.

Cognitive Enhancement Research
BDNF, neuroplasticity, and anxiolytic mechanisms in nootropic peptide research

Semax and Selank are Soviet-era synthetic peptides developed in Russia during the 1970s–80s and still prescribed there today for stroke recovery, anxiety disorders, and cognitive decline. Unlike stimulants (which flood the brain with dopamine) or sedatives (which suppress neuronal activity), these peptides work by upregulating the brain\'s own growth and repair factors. Semax stimulates the production of BDNF — brain-derived neurotrophic factor — a protein critical for learning, memory, and neuronal survival. Selank modulates the GABA system, the brain\'s primary calming pathway, producing anxiolytic effects without the sedation or dependence risk of benzodiazepines. A key practical advantage: both are administered as nasal sprays, bypassing the need for injections.

2 peptides2 studies · 2 Q&A
Immunity Enhancement Research
T-cell modulation, innate immunity, and adjuvant effects in preclinical models

Thymosin Alpha-1 stands apart from most research peptides by having the most robust clinical validation: it is an approved pharmaceutical (Zadaxin®) in over 35 countries including Italy, China, and various Asian and Eastern European nations. The thymus gland produces Thymosin Alpha-1 naturally to "educate" T-cells — white blood cells that coordinate the immune response. As we age, thymic output declines, and with it the efficiency of our immune surveillance. Thymosin Alpha-1 is studied to restore this immune competence: activating natural killer cells, boosting T-cell populations, and enhancing the body\'s response to vaccines and infections. It is of particular interest to self-researchers focused on immune optimisation, post-illness recovery, and age-related immune decline.

1 peptide2 studies · 2 Q&A
Sleep Enhancement Research
Slow-wave sleep modulation and stress-induced insomnia in EEG models

Sleep quality is increasingly recognised as one of the most powerful levers for health, cognitive performance, and longevity. DSIP (Delta Sleep-Inducing Peptide) was discovered in 1977 when researchers isolated it from rabbit blood during natural sleep and found that injecting it into alert rabbits induced slow-wave (deep) sleep within 30 minutes. Unlike sleeping pills, which work by broadly suppressing brain activity, DSIP specifically promotes delta-wave (slow-wave) sleep — the deepest and most restorative stage — without sedation, respiratory depression, or dependence. Selank contributes to this category through its anxiolytic mechanism: by reducing the hyperarousal (racing thoughts, elevated cortisol, difficulty switching off) that underlies stress-induced insomnia, without the muscle-relaxing or respiratory effects of benzodiazepines.

2 peptides1 studies · 2 Q&A
Reproductive Health Research
Melanocortin receptor pharmacology and sexual behaviour in preclinical models

PT-141, known clinically as Bremelanotide and sold as Vyleesi®, is the only FDA-approved peptide specifically for sexual dysfunction — approved in 2019 for hypoactive sexual desire disorder in premenopausal women. What makes PT-141 unique is where it acts: not in the blood vessels, like Viagra or Cialis, but in the brain. It activates melanocortin receptors in the hypothalamus — a region involved in desire, arousal, and motivation — producing an increase in sexual interest that is centrally driven rather than mechanically facilitated. This makes it relevant for addressing the desire and psychological components of sexual dysfunction, which PDE5 inhibitors cannot reach. It has been studied in both men and women, giving it one of the broadest clinical research bases of any peptide on this site.

1 peptide2 studies · 2 Q&A
Editorial methodology
How PeptideGuide rates research peptide vendors — the 5-axis weighted methodology

PeptideGuide rates vendors on 5 weighted axes: Testing (30%), Purity (20%), Regional-Friendliness (20%), Value (15%), Trust (15%). Each axis has a publishable rubric. The composite score 0-10 produces regional leaderboards and Editor\'s Choice designations. The personalized finder applies axis multipliers per buyer-priority answer. Methodology is transparent and quarterly-reviewed. Affiliate commissions do NOT affect scoring.

0 peptides0 studies · 7 Q&A
Editorial methodology
How to read a research peptide Certificate of Analysis — what each test means and what to look for

A genuine CoA names the lab, the batch (lot number), the test methods used, and is signed/dated. Demand HPLC (purity %) AND LC-MS (identity confirmation via molecular mass) at minimum — without both, purity alone tells you nothing about WHAT is pure. CLND verifies absolute peptide content; LAL measures endotoxin (critical for injection research); FTIR confirms structural identity. Independent third-party lab CoAs (Janoshik Analytical, Eurofins, etc.) beat in-house CoAs. Per-batch CoA archive beats a single demo CoA. Apply the 8-item red flag checklist before ordering.

0 peptides0 studies · 7 Q&A
Editorial methodology
Research-use-only labeling explained — what RUO means legally, what it does not mean, and how regulators treat it across markets

RUO ("research use only") is a regulatory positioning device. It places vendors outside pharmaceutical drug regulation and inside research-reagent regulation. It permits sale, advertising (restricted), shipping, and purchase for laboratory research. It does NOT permit therapeutic claims, dosing recommendations for human use, or sale to known therapeutic-use customers. It does NOT certify quality. It does NOT transfer legal use-protection to buyers. Regulatory treatment varies meaningfully across US (FDA), EU (EMA + national agencies), UK (MHRA), AU (TGA Schedule 4 — strictest), JP (PMD-Act + Yakkan Shoumei only for approved-pharma versions), CA (Health Canada NPN/DIN exemption), GCC (SFDA/MoHAP/KFDA/NHRA), Africa (per-country: SAHPRA/NAFDAC/EDA/etc.), LATAM (ANVISA/COFEPRIS/ANMAT/INVIMA/ISP/DIGEMID), and Russia (Roszdravnadzor + sanctions overlay).

0 peptides0 studies · 7 Q&A
Editorial methodology
Peptide reconstitution and bacteriostatic water guide — the math, the materials, the storage realities

Reconstitution math: concentration (mg/mL) = peptide mass (mg) / volume added (mL). Common reconstitutions: 5mg vial + 1mL BAC water = 5mg/mL; 5mg + 2mL = 2.5mg/mL; 5mg + 2.5mL = 2mg/mL. Use bacteriostatic water (BAC water), insulin syringes, refrigerator storage 28-day window for reconstituted vials, refrigerator or freezer for lyophilized vials pre-reconstitution. Lyophilized peptides do NOT require cold-chain shipping — room-temperature international transit is operationally clean. Avoid tap water, distilled water for multi-day use, shaking during reconstitution, and high reconstitution temperatures.

0 peptides0 studies · 7 Q&A
Editorial methodology
The research peptide supply chain explained — manufacturers, vendors, testing, shipping, and where quality actually comes from

4-stage supply chain: Synthesis (mostly Chinese manufacturers, some Slovakia/Cyprus/Spain/Vietnam) → Bulk purchase (vendors buy kilogram-scale) → Repackaging + CoA verification (where consumer-facing vendor differentiation actually happens) → Warehouse + shipping + customer service. Quality lives at stages 1-3, not stage 4. Most consumer vendors buy from the same upstream manufacturers — differentiation comes from testing depth, batch-level verification, and operating history. Particle Peptides (Slovakia) is the EU gold standard via vertical integration. Core Peptides (US) is the US gold standard via multi-lab third-party CoA verification compensating for non-vertical-integration. Weighting testing depth heavily is the buyer\'s rational response to the supply-chain structure.

0 peptides0 studies · 7 Q&A
Editorial methodology
WADA Prohibited List for research peptides — which compounds are banned for tested athletes, what the classes mean, detection windows

WADA Prohibited List applies to tested athletes registered with WADA-Code-adopting federations (Olympic pathway, NCAA, World Athletics, FIFA, national teams in most sports). Most research peptides are banned: BPC-157 (S0 since 2022), TB-500 (S2.4), IGF-1 LR3 (S2.4), CJC-1295/Ipamorelin (S2.5), MGF (S2.4), GHK-Cu injectable (S0). Strict liability — "I didn\'t know" is not a defense. Default 4-year ban for first violations. TUE structurally closed for research-grade compounds. Detection windows 2-10 weeks depending on compound. Out-of-competition testing means no "wash out" strategy is safe. Non-tested athletes (recreational, masters in non-WADA federations) face NO WADA enforcement.

0 peptides0 studies · 7 Q&A
Pesquisa de crescimento muscular
Ativação de células satélite e sinalização hipertrófica em músculo esquelético

CJC-1295, Ipamorelin, GHK-Cu, IGF-1 LR3 são os peptídeos mais pesquisados para crescimento muscular. Todos proibidos pela WADA. Atletas testados no Brasil devem evitar todos. Pesquisa não institucional sujeita ao marco regulatório brasileiro (ANVISA RDC 430/2020).

0 peptides0 studies · 6 Q&A
Pesquisa de perda de peso
Lipólise, secretagogos de GH, e modulação do tecido adiposo

Tirzepatide e Semaglutide aprovados pela ANVISA transformaram o espaço de peptídeos para perda de peso. AOD-9604 e outros permanecem research-use-only. Acesso farmacêutico regular é geralmente preferível à importação transfronteiriça quando possível.

0 peptides0 studies · 6 Q&A
Pesquisa de cura e regeneração
Aceleração de reparo tecidual e cicatrização em modelos pré-clínicos

BPC-157 e TB-500 são os peptídeos mais pesquisados em cura e regeneração. Mecanismos complementares — via NO/VEGF (BPC-157) e polimerização de actina (TB-500). Proibidos pela WADA. Pesquisadores brasileiros acessam via importação transfronteiriça com risco aduaneiro moderado.

2 peptides0 studies · 6 Q&A
Pesquisa de longevidade e antienvelhecimento
Biologia telomérica, regulação epigenética, e remodelação de matriz extracelular

Epithalon (telomerase, pesquisa russa Khavinson), GHK-Cu (modulação gênica), e FOXO4-DRI (senolítico) são os principais compostos de longevidade research-use-only. Todos sob S0 na WADA. Pesquisadores brasileiros acessam via importação transfronteiriça; cadeia de frio é crítica.

2 peptides0 studies · 6 Q&A
Marco regulatório brasileiro
ANVISA RDC 430/2020 — peptídeos de pesquisa no Brasil

Brasil tem o framework regulatório LATAM mais rigoroso mas com tolerância controlada para declarações research-use-only corretas. ANVISA enforces contra vendedores com afirmações terapêuticas, não contra compradores individuais. Universidades mantêm vias institucionais limpas via RDC 9/2015 e RDC 38/2014.

0 peptides0 studies · 6 Q&A
Marco regulatório brasileiro
Receita Federal + importação de peptídeos — realidade alfandegária brasileira

Receita Federal aprova a maioria dos envios research-use-only ao Brasil em 5-10 dias úteis. Tributos totais ~30-40% sobre valor declarado. DHL Express tem o melhor track record. Universidades têm isenção tributária parcial via Lei 8.010/90.

0 peptides0 studies · 6 Q&A
Marco regulatório brasileiro
LGPD + dados de comprador em vendors de peptídeos

LGPD se aplica a vendors internacionais que processam dados de brasileiros. A maioria dos vendors de peptídeos não cumpre totalmente. ANPD não tem enfocado cumprimento contra eles. Cryptocurrency reduz footprint de dados pessoais. PeptideGuide opera em conformidade LGPD para visitantes brasileiros.

0 peptides0 studies · 6 Q&A
Classificação de fornecedores Brasil
Melhor fornecedor de peptídeos Brasil 2026 — classificação baseada em metodologia

Particle Peptides retém 2026 Brasil Editor's Choice pelo rigor de testes (7 parâmetros) e suporte parcial em português. SwissChems é a opção para maior comissão de afiliados. Nenhum fornecedor brasileiro doméstico — todas as compras transfronteiriças. Cryptocurrency útil para contornar limites do Banco Central.

0 peptides0 studies · 5 Q&A
Comparação cara a cara Brasil
Particle Peptides vs SwissChems — comparação cara a cara Brasil 2026

Particle Peptides ganha em rigor de testes (7 parâmetros) e base de avaliações (308 verificadas). SwissChems ganha em comissão de afiliados (20%) e catálogo amplo. Pesquisadores institucionais e qualidade-conscientes devem escolher Particle Peptides. Criadores de conteúdo podem preferir SwissChems pela comissão.

0 peptides0 studies · 5 Q&A
Análise de fornecedores Brasil
SwissChems revisão completa 2026 — fornecedor americano para o mercado brasileiro

SwissChems é fornecedor mid-tier americano para o mercado brasileiro. HPLC + LC-MS, pureza 99.3%. Envio 7-14 dias EUA-Brasil via DHL Express. Comissão de afiliados a mais alta do segmento (20%, sem cookie). Impostos de importação brasileiros (~60%) neutralizam vantagem de preço atacado vs Particle Peptides UE. Para a maioria dos compradores brasileiros, [Particle Peptides](/research/particle-peptides-vs-swisschems-brasil-comparacao) permanece Editor's Choice via profundidade de testes superior + Trustpilot 308+ avaliações.

0 peptides0 studies · 4 Q&A
Análise de fornecedores Brasil
Particle Peptides revisão completa 2026 — Editor's Choice para pesquisadores brasileiros

Particle Peptides UE é Editor's Choice para Brasil. Testes 7 parâmetros à Farmacopeia Europeia. Certificações ISO 9001 + ISO 13485. 4.9/5 Trustpilot 308+ avaliações verificadas — a maior do segmento globalmente. Envio 5-10 dias UE-Brasil via DHL Express. Programa de afiliados 15%/10% com cookie 365 dias. Para maioria dos compradores brasileiros, esta é a escolha operacionalmente correta vs competidores US-origem.

0 peptides0 studies · 4 Q&A
Análise de fornecedores Brasil
Behemoth Labz revisão completa 2026 — fornecedor US-doméstico com programa de afiliados ativo no Brasil

Behemoth Labz é mid-tier US-doméstico com programa de afiliados ativo (aff/238 link) para o mercado brasileiro. HPLC + LC-MS, pureza 98.5%. Envio 7-14 dias EUA-Brasil. 10% comissão com cookie 30 dias. Vantagem marginal de preço vs SwissChems após impostos brasileiros. Para qualidade superior, [Particle Peptides UE](/research/particle-peptides-revisao-completa-brasil-2026) permanece a escolha.

0 peptides0 studies · 4 Q&A
Análise de fornecedores Brasil
PeptidesDirect revisão completa 2026 — fornecedor UE multilingual com 13 idiomas + SEPA institucional

PeptidesDirect é o fornecedor UE multilingual (13 idiomas incluindo PORTUGUÊS) + SEPA institucional. HPLC + LC-MS + Janoshik third-party verificação. Pureza 99.0%. 4 anos de histórico operacional. Para compradores brasileiros priorizando suporte português dedicado ou procurement institucional via bank transfer. Sem programa de afiliados. Para qualidade máxima de testes, [Particle Peptides](/research/particle-peptides-revisao-completa-brasil-2026) supera; para suporte português, PeptidesDirect é única opção UE.

0 peptides0 studies · 4 Q&A