Full Catalogue

RESEARCH-GRADEPEPTIDES

Every compound independently verified. 99%+ purity. Dispatched from the UK.

TRACKED 24£8 tracked delivery — order before 1pm for next day delivery
8 compounds
99%+ purity verified
Cold-chain dispatched
Weight LossNew

Retatrutide

Retatrutide (LY3437943)

99.1%purity

Retatrutide is a novel triple agonist peptide that simultaneously activates GIP (glucose-dependent insulinotropic polypeptide), GLP-1 (glucagon-like peptide-1), and glucagon receptors. Research demonstrates superior metabolic outcomes compared to dual agonists, with significant effects on body weight reduction, glucose regulation, and lipid metabolism.

Key Benefits
  • ›Triple receptor agonism: GIP, GLP-1, and glucagon
  • ›Significant reduction in body weight in research subjects
  • ›Improved glycaemic control and insulin sensitivity
  • ›Favourable effects on lipid profiles
  • ›Enhanced energy expenditure via glucagon pathway
Available Sizes
30mg — £10060mg — £150
Enquire Now
Weight LossHigh Demand

Tirzepatide

Tirzepatide (LY3298176)

99.3%purity

Tirzepatide is a once-weekly dual glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) receptor agonist. Research demonstrates substantial reductions in HbA1c and body weight. Its unique dual mechanism of action produces complementary metabolic effects, with GIP activity enhancing the GLP-1 mediated response.

Key Benefits
  • ›Dual GIP and GLP-1 receptor agonism
  • ›Substantial body weight reduction in research models
  • ›Significant HbA1c lowering effect
  • ›Improved insulin secretion and sensitivity
  • ›Reduced appetite and caloric intake
Available Sizes
30mg — £6560mg — £100
Enquire Now
Weight LossResearch Grade

Semaglutide

Semaglutide

99.5%purity

Semaglutide is a long-acting GLP-1 (glucagon-like peptide-1) receptor agonist with a half-life of approximately 7 days, enabling once-weekly dosing in research protocols. Structural modifications including a C18 fatty diacid chain confer albumin binding and protease resistance. Extensively studied for effects on glycaemic control, body weight, and cardiovascular markers.

Key Benefits
  • ›Potent GLP-1 receptor agonism with 7-day half-life
  • ›Significant and sustained body weight reduction
  • ›Robust HbA1c reduction in research subjects
  • ›Cardiovascular risk marker improvement
  • ›Appetite suppression via central and peripheral pathways
Available Sizes
20mg — £10040mg — £150
Enquire Now
AncillariesEssential

BAC Water

Bacteriostatic Water 10ml

USP Gradepurity

Bacteriostatic Water (BAC Water) is sterile water containing 0.9% benzyl alcohol as a preservative. It is the standard diluent used for reconstituting lyophilised peptide powders for research purposes. The benzyl alcohol inhibits bacterial growth, allowing multi-use vials to remain stable over extended periods when stored correctly.

Key Benefits
  • ›USP-grade sterile water for research use
  • ›0.9% benzyl alcohol preservative for multi-use stability
  • ›Standard diluent for lyophilised peptide reconstitution
  • ›Maintains sterility across multiple draws
  • ›Compatible with all lyophilised peptide compounds
Available Sizes
10ml — £8
Enquire Now
MetabolicPopular

MT-2

Melanotan II

99.2%purity

Melanotan II is a synthetic analogue of the naturally occurring alpha-melanocyte-stimulating hormone (α-MSH). It acts as a non-selective agonist at melanocortin receptors (MC1R–MC5R). Research has investigated its effects on skin pigmentation via melanogenesis stimulation, appetite suppression, and energy expenditure. Its broad receptor activity makes it a widely studied compound in metabolic and dermatological research.

Key Benefits
  • ›Stimulates melanogenesis via MC1R activation
  • ›Appetite suppression and reduced food intake
  • ›Increased energy expenditure in research models
  • ›Broad melanocortin receptor agonism (MC1–MC5)
  • ›Extensively studied in metabolic and pigmentation research
Available Sizes
10mg — £30
Enquire Now
RegenerationResearch Grade

GHK-Cu

Copper Peptide GHK-Cu

99.3%purity

GHK-Cu is a naturally occurring copper-binding tripeptide found in human plasma, saliva, and urine. Research demonstrates wide-ranging regenerative effects including stimulation of collagen and glycosaminoglycan synthesis, wound healing acceleration, anti-inflammatory action, and antioxidant activity. Studies also indicate modulation of over 4,000 human genes, with significant upregulation of tissue repair pathways.

Key Benefits
  • ›Stimulates collagen and elastin synthesis
  • ›Accelerates wound healing and tissue repair
  • ›Potent antioxidant and anti-inflammatory action
  • ›Promotes angiogenesis and nerve outgrowth
  • ›Modulates gene expression across repair pathways
Available Sizes
50mg — £30
Enquire Now
PerformancePopular

Cialis 5mg

Tadalafil 5mg (10 Tablets)

99.2%purity

Tadalafil (Cialis) 5mg is a selective phosphodiesterase type 5 (PDE5) inhibitor. At low daily doses it has been extensively researched for its effects on smooth muscle relaxation, increased blood flow, and cardiovascular markers. Research also covers pulmonary arterial hypertension, exercise capacity, and endothelial function.

Key Benefits
  • ›Selective PDE5 inhibition with long half-life (~17.5 hours)
  • ›Promotes smooth muscle relaxation and vasodilation
  • ›Studied for cardiovascular and pulmonary hypertension research
  • ›Improved endothelial function markers in research models
  • ›Well-characterised pharmacokinetic profile
Available Sizes
5mg x 10 — £15
Enquire Now
HormonesPremium

HGH

Human Growth Hormone (Somatropin)

99.0%purity

Human Growth Hormone (HGH / Somatropin) is a 191-amino acid polypeptide hormone produced by the anterior pituitary gland. Recombinant HGH is extensively studied for its roles in cell growth, reproduction, and regeneration. Research covers its effects on lean body mass, fat metabolism, bone density, and IGF-1 axis modulation.

Key Benefits
  • ›Stimulates IGF-1 production and anabolic signalling
  • ›Promotes lipolysis and lean body composition in research models
  • ›Supports bone mineral density and skeletal growth
  • ›Accelerates tissue repair and cellular regeneration
  • ›Well-characterised pharmacokinetic and pharmacodynamic profile
Available Sizes
100iu — £120150iu — £170240iu — £250
Enquire Now
⚠

All products are sold strictly for research purposes only. Not intended for human consumption. For laboratory use only. Must be 18+ to purchase. Muscle Labs Ltd makes no medical claims.

Muscle Labs

Research-grade peptides engineered for elite performance. UK-based. Precision formulated.

Legal

All products sold by Muscle Labs are strictly for research purposes only. Not intended for human consumption. Must be 18+ to purchase. For laboratory use only.

Muscle Labs Ltd · United Kingdom

© 2026 Muscle Labs Ltd. All rights reserved.