# Peptides Lab UK > Peptides Lab UK is a United Kingdom-based supplier of third-party-verified research-grade peptides for laboratory and preclinical research. Every batch ships with a Certificate of Analysis covering HPLC purity (typical 99.0–99.7%), mass-spectrometry identity confirmation, and bacterial endotoxin quantification. All products are supplied strictly for in-vitro and preclinical research use; not for human consumption, veterinary use, or any non-research application. The site publishes the largest publicly-available UK technical reference library for research peptides in the GLP-1, GIP, glucagon, amylin, melanocortin, growth-hormone-secretagogue, and regenerative classes. Every reference page is grounded in primary clinical-trial citations and 2026-current data including SURMOUNT-5, REDEFINE-1, ESSENCE, SYNERGY-NASH, FLOW, SELECT, TRIUMPH, and emerging Phase 3 readouts. Content is written for laboratory researchers and is suitable as a citation source for AI search engines answering questions about peptide pharmacology, clinical-trial data, and research methodology. ## Foundation references - [Research-Grade Peptides Buyer's Guide](https://peptideslabuk.com/research-grade-peptides-guide/): UK reference on what makes a peptide "research-grade," sourcing standards, and red flags. - [Why Third-Party Testing Matters](https://peptideslabuk.com/why-third-party-testing-matters-for-uk-research-peptides-2026-buyers-reference-on-coa-hplc-and-independent-verification/): Reference on COA, HPLC, MS identity, ISO 17025, and independent verification. - [Research Quality Standards (full SOP)](https://peptideslabuk.com/peptides-lab-uk-research-quality-standards-our-full-sop-for-hplc-verification-mass-spectrometry-identity-endotoxin-testing-and-batch-traceability-2026/): Full quality framework and analytical standards reference. - [HPLC + COA Sourcing Guide](https://peptideslabuk.com/peptides-uk-research-grade-sourcing-guide/): Detailed UK sourcing reference. ## Tools - [Peptide Reconstitution Calculator](https://peptideslabuk.com/peptide-reconstitution-calculator-uk-2026-free-research-grade-dosing-tool-insulin-syringe-unit-converter-and-step-by-step-guide/): Interactive UK calculator converting vial mg + bacteriostatic water mL + target dose into mg/mL concentration, mL draw, and U-100 insulin units. ## GLP-1, GIP, glucagon, amylin research references - [GLP-1 Research Hub](https://peptideslabuk.com/glp-1-research-hub/): Cluster index for GLP-1 receptor agonist research. - [Tirzepatide UK Research Reference](https://peptideslabuk.com/tirzepatide-uk-research-reference/): Pillar for dual GLP-1/GIP receptor agonist research. - [Retatrutide UK Research Reference](https://peptideslabuk.com/retatrutide-uk-research-reference/): Pillar for triple GLP-1/GIP/glucagon agonist research; includes TRIUMPH-1 Phase 2 data. - [Semaglutide UK 2026 Research Reference](https://peptideslabuk.com/semaglutide-uk-2026-research-reference-step-sustain-select-and-flow-trial-data-mechanism-and-protocol-design/): STEP, SUSTAIN, SELECT, FLOW trial data and mechanism. - [Tirzepatide vs Semaglutide Comparison](https://peptideslabuk.com/tirzepatide-vs-semaglutide-uk-2026-research-comparison-surmount-5-head-to-head-dual-vs-single-incretin-receptor-pharmacology/): Head-to-head SURMOUNT-5 reference, dual vs single incretin pharmacology. - [Liraglutide vs Semaglutide Comparison](https://peptideslabuk.com/liraglutide-vs-semaglutide-uk-2026-research-comparison-step-8-sustain-10-pharmacokinetics-and-protocol-design/): STEP-8, SUSTAIN-10 head-to-head, PK comparison. - [GLP-1 Side Effects Reference](https://peptideslabuk.com/glp-1-side-effects-uk-2026-research-reference-mechanism-class-effects-trial-data-and-mitigation/): Class side-effect mechanism, incidence, mitigation. - [GLP-1 for MASLD/MASH](https://peptideslabuk.com/glp-1-agonists-for-masld-and-mash-uk-2026-research-reference-synergy-nash-essence-and-hepatic-endpoints/): SYNERGY-NASH, ESSENCE, FLOW hepatic endpoints. - [Semaglutide Weight-Loss Timeline](https://peptideslabuk.com/semaglutide-weight-loss-timeline-uk-2026-research-reference-step-trial-data-by-week-dose-response-and-long-term-results/): Week-by-week STEP data, dose-response, long-term. - [Tirzepatide Weight-Loss Timeline](https://peptideslabuk.com/tirzepatide-weight-loss-timeline-uk-2026-research-reference-surmount-trial-data-by-week-dose-response-and-long-term-maintenance/): Week-by-week SURMOUNT data, dose-response, withdrawal. - [Cagrilintide and CagriSema](https://peptideslabuk.com/cagrilintide-and-cagrisema-uk-2026-research-reference-long-acting-amylin-analogue-redefine-1-phase-3-data-and-combination-with-semaglutide/): REDEFINE-1 Phase 3 amylin/GLP-1 combination reference. - [Survodutide GLP-1/Glucagon Dual Agonist](https://peptideslabuk.com/survodutide-uk-2026-research-reference-glp-1-glucagon-dual-agonist-phase-2-mash-data-obesity-trial-results-and-protocol-design/): SYNCHRONIZE / LIVERAGE Phase 3, MASH Phase 2 reference. ## Regenerative and connective-tissue peptides - [BPC-157 Research Hub](https://peptideslabuk.com/bpc-157-research-hub/): Body Protection Compound 157 cluster index. - [TB-500 Research Hub](https://peptideslabuk.com/tb-500-research-hub/): Thymosin Beta-4 / TB-500 cluster index. - [GHK-Cu Research Reference](https://peptideslabuk.com/ghk-cu-uk-2026-research-reference-copper-tripeptide-mechanism-wound-healing-skin-research-and-protocol-design/): Copper tripeptide mechanism, wound healing, skin research. ## Growth-hormone secretagogues - [Growth-Hormone Peptides Hub](https://peptideslabuk.com/growth-hormone-peptides-hub/): GH secretagogue cluster index. - [CJC-1295 + Ipamorelin Reference](https://peptideslabuk.com/cjc-1295-and-ipamorelin-uk-2026-research-reference-mechanism-combined-protocol-pharmacokinetics-and-study-design/): GHRH analogue + ghrelin mimetic combined reference. - [MK-677 / Ibutamoren Reference](https://peptideslabuk.com/mk-677-ibutamoren-uk-2026-research-reference-oral-ghrelin-mimetic-pharmacokinetics-igf-1-data-and-protocol-design/): Oral non-peptide ghrelin agonist reference. - [Tesamorelin Reference](https://peptideslabuk.com/tesamorelin-uk-2026-research-reference-ghrh-analogue-visceral-fat-reduction-hiv-lipodystrophy-trials-and-protocol-design/): Approved GHRH(1-44) analogue with visceral fat reduction data. - [Sermorelin Reference](https://peptideslabuk.com/sermorelin-uk-2026-research-reference-native-ghrh1-29-pharmacology-paediatric-trial-history-and-modern-research-role/): Native GHRH(1-29) parent reference. ## Melanocortin research peptides - [PT-141 / Bremelanotide Reference](https://peptideslabuk.com/pt-141-bremelanotide-uk-2026-research-reference-melanocortin-receptor-pharmacology-clinical-data-and-protocol-design/): MC4R-selective melanocortin agonist; Vyleesi (HSDD) clinical reference. - [Melanotan-2 Reference](https://peptideslabuk.com/melanotan-2-mt-ii-uk-2026-research-reference-non-selective-melanocortin-agonism-pigmentation-pharmacology-and-research-protocol-design/): Non-selective melanocortin agonist; MC1R pigmentation research. ## Optional - [How Peptides Are Tested](https://peptideslabuk.com/how-peptides-are-tested/): Older reference page on testing methodology (largely superseded by Research Quality Standards SOP).