# PeptideMark > The most comprehensive, evidence-based peptide reference on the internet. Independent, vendor-free research covering 20+ peptide compounds, FDA regulatory updates, clinical trial analysis, and practical guides. PeptideMark is an educational resource for researchers, clinicians, and individuals seeking science-backed information about peptides. All content is reviewed by editorial staff, cites primary sources (PubMed, FDA, clinical trials), and includes medical disclaimers. PeptideMark does not sell peptides or supplements. ## Key Sections - [Peptide Compound Database](https://www.peptidemark.com/peptides): Profiles of 20+ peptide compounds with mechanisms, evidence ratings, clinical data, and safety information - [Research & News](https://www.peptidemark.com/news): FDA regulatory updates, clinical trial results, and industry analysis - [Deep Dive Articles](https://www.peptidemark.com/learn): Evidence-based guides on peptide topics including muscle growth, weight loss, anti-aging, and safety - [Practical Guides](https://www.peptidemark.com/guides): Reconstitution, dosing, injection sites, storage, needle/syringe selection, and safety protocols - [Peptide Comparisons](https://www.peptidemark.com/peptides/compare): Head-to-head compound comparisons with evidence-based analysis - [Conditions & Use Cases](https://www.peptidemark.com/conditions): Peptides organized by health condition and therapeutic application - [Tools](https://www.peptidemark.com/tools): Reconstitution calculator, FDA tracker, dosage reference, and peptide quiz - [Glossary](https://www.peptidemark.com/glossary): 140+ peptide science terms defined - [Research Library](https://www.peptidemark.com/research): Curated PubMed studies with summaries ## Compound Profiles - [BPC-157](https://www.peptidemark.com/peptides/bpc-157): Body Protection Compound, gut healing and tissue repair - [Semaglutide](https://www.peptidemark.com/peptides/semaglutide): GLP-1 receptor agonist (Ozempic, Wegovy) for weight loss and diabetes - [Tirzepatide](https://www.peptidemark.com/peptides/tirzepatide): Dual GIP/GLP-1 agonist (Mounjaro, Zepbound) for weight loss and diabetes - [CJC-1295](https://www.peptidemark.com/peptides/cjc-1295): Growth hormone releasing hormone analog - [Ipamorelin](https://www.peptidemark.com/peptides/ipamorelin): Selective growth hormone secretagogue - [MK-677](https://www.peptidemark.com/peptides/mk-677): Oral ghrelin receptor agonist (ibutamoren) - [TB-500](https://www.peptidemark.com/peptides/tb-500): Thymosin Beta-4 fragment, tissue repair - [GHK-Cu](https://www.peptidemark.com/peptides/ghk-cu): Copper peptide for skin and tissue regeneration - [Sermorelin](https://www.peptidemark.com/peptides/sermorelin): GHRH analog for growth hormone stimulation - [Tesamorelin](https://www.peptidemark.com/peptides/tesamorelin): FDA-approved GHRH analog (Egrifta) - [Retatrutide](https://www.peptidemark.com/peptides/retatrutide): Triple agonist (GLP-1/GIP/glucagon) in clinical trials - [PT-141](https://www.peptidemark.com/peptides/pt-141): Bremelanotide for sexual dysfunction - [Selank](https://www.peptidemark.com/peptides/selank): Anxiolytic peptide, tuftsin analog - [Semax](https://www.peptidemark.com/peptides/semax): Nootropic peptide, ACTH fragment - [AOD-9604](https://www.peptidemark.com/peptides/aod-9604): Anti-obesity peptide, GH fragment - [Epithalon](https://www.peptidemark.com/peptides/epithalon): Telomerase-activating peptide - [MOTS-c](https://www.peptidemark.com/peptides/mots-c): Mitochondrial-derived peptide for metabolism - [NAD+](https://www.peptidemark.com/peptides/nad-plus): Nicotinamide adenine dinucleotide for cellular energy - [Melanotan II](https://www.peptidemark.com/peptides/melanotan-ii): Melanocortin receptor agonist - [Thymosin Alpha-1](https://www.peptidemark.com/peptides/thymosin-alpha-1): Immune-modulating peptide ## Popular Guides - [What Are Peptides?](https://www.peptidemark.com/guides/what-are-peptides): Introduction to peptide science - [Peptide Reconstitution Guide](https://www.peptidemark.com/guides/peptide-reconstitution-guide): How to reconstitute lyophilized peptides - [Peptide Injection Sites](https://www.peptidemark.com/guides/peptide-injection-sites): Subcutaneous injection guide - [Peptide Safety Guide](https://www.peptidemark.com/guides/peptide-safety-guide): Risk assessment and harm reduction - [Peptide Needle & Syringe Guide](https://www.peptidemark.com/guides/peptide-needle-syringe-guide): Equipment selection - [Peptide Storage & Handling](https://www.peptidemark.com/guides/peptide-storage-handling): Stability and storage protocols - [Peptide Therapy Guide](https://www.peptidemark.com/guides/peptide-therapy-guide): Working with prescribers - [Peptides for Weight Loss](https://www.peptidemark.com/guides/peptides-for-weight-loss): GLP-1 agonists and beyond ## Key Articles - [Are Peptides Legal in 2026?](https://www.peptidemark.com/news/are-peptides-legal-2026-complete-guide): Complete legal status guide - [Best Peptides for Muscle Growth](https://www.peptidemark.com/learn/best-peptides-for-muscle-growth-recovery-evidence): Evidence-based muscle growth guide - [Best Peptides for Anti-Aging](https://www.peptidemark.com/learn/best-peptides-for-anti-aging-longevity-evidence): Longevity peptide evidence review - [Semaglutide vs Tirzepatide](https://www.peptidemark.com/news/semaglutide-vs-tirzepatide-comparison): Head-to-head comparison - [FDA Category 2 Compounding Ban](https://www.peptidemark.com/news/fda-category-2-compounding-ban-complete-guide): Regulatory explainer - [Peptides vs SARMs vs Steroids](https://www.peptidemark.com/learn/peptides-vs-sarms-vs-steroids): Comparison guide - [Foundayo (Orforglipron) FDA Approval](https://www.peptidemark.com/news/foundayo-orforglipron-fda-approval-glp1-pill-2026): First oral GLP-1 pill - [Medicare GLP-1 Bridge: $50/Month Starting July 2026](https://www.peptidemark.com/news/medicare-glp1-bridge-50-dollars-weight-loss-drugs-2026): Medicare coverage for weight loss drugs - [FDA Proposes Permanent Ban on Compounded GLP-1s](https://www.peptidemark.com/news/fda-503b-compounded-semaglutide-tirzepatide-ban-2026): 503B bulks list exclusion - [Oral GLP-1s Suppress Brain Cravings (NIH/Nature)](https://www.peptidemark.com/news/oral-glp1-brain-cravings-central-amygdala-nature-study-2026): Central amygdala mechanism - [FDA Peptide Advisory Committee July 2026](https://www.peptidemark.com/news/rfk-fda-peptide-advisory-committee-pcac-july-2026): PCAC meeting preview - [GLP-1 Drugs and Addiction Treatment](https://www.peptidemark.com/learn/glp1-drugs-addiction-substance-use-disorder-evidence-2026): Substance use disorder evidence - [NAD+ and MOTS-c Longevity Evidence](https://www.peptidemark.com/learn/nad-plus-mots-c-longevity-peptides-evidence-2026): Mitochondrial peptide review ## Tools - [Reconstitution Calculator](https://www.peptidemark.com/tools/reconstitution-calculator): Calculate peptide dilution volumes - [FDA Peptide Tracker](https://www.peptidemark.com/tools/fda-tracker): Real-time FDA regulatory status - [Dosage Reference](https://www.peptidemark.com/tools/dosage-reference): Evidence-based dosing ranges - [Peptide Quiz](https://www.peptidemark.com/tools/peptide-quiz): Find peptides matching your goals ## Optional - [llms-full.txt](https://www.peptidemark.com/llms-full.txt): Extended version with all article URLs and compound details