Research Library

Understanding HPLC: The Gold Standard for Peptide Purity Analysis
What is HPLC? High-Performance Liquid Chromatography (HPLC) is an analytical separation technique used to identify, quantify, and purify individual components within a mixture. In peptide research, it serves as the primary instrument for determining compound purity, detecting impurities, and verifying batch consistency. HPLC is considered the gold standard for peptide purity analysis due to its sensitivity, reproducibility, and quantitative precision. How HPLC Works HPLC operates by forcing a liquid sample through a column packed with a stationary phase material under high pressure. As the sample travels through the column, its... Read more...
Purity Testing in Peptide Research: Why It Matters
What is Purity Testing? Purity testing refers to the analytical processes used to determine the compositional integrity of a synthesised compound, specifically the proportion of the target molecule relative to impurities, by-products, and residual reagents. In the context of research-grade peptides, purity is typically expressed as a percentage and measured using validated analytical techniques. At Astralis Labs, all compounds are independently tested by accredited third-party laboratories prior to release. Certificates of Analysis (COAs) are available for each batch, providing full transparency on purity specifications and analytical methodology. Why Purity Matters... Read more...
Retatrutide: Mechanism & Metabolic Research Guide
What is Retatrutide? Retatrutide is a next-generation triple agonist peptide developed to target three key metabolic receptors simultaneously: GLP-1 (glucagon-like peptide-1), GIP (glucose-dependent insulinotropic polypeptide), and glucagon receptors. This tri-agonist mechanism represents a significant advancement over earlier dual-agonist compounds, offering superior metabolic modulation across multiple pathways. Mechanism of Action By activating all three receptors concurrently, Retatrutide delivers a multi-pronged metabolic effect: GLP-1 Agonism: Reduces appetite, slows gastric emptying, and improves insulin secretion in a glucose-dependent manner. GIP Agonism: Enhances insulin sensitivity, supports fat metabolism, and may amplify the appetite-suppressing effects... Read more...
Tirzepatide: GLP-1/GIP Mechanism & Metabolic Research Guide
What is Tirzepatide? Tirzepatide is a dual agonist peptide that simultaneously targets two incretin receptors: GLP-1 (glucagon-like peptide-1) and GIP (glucose-dependent insulinotropic polypeptide). Originally developed for type 2 diabetes management, its profound effects on body weight and metabolic health have made it one of the most studied compounds in contemporary metabolic research. It is administered as a once-weekly subcutaneous injection. Mechanism of Action Tirzepatide's dual receptor activity produces complementary and synergistic metabolic effects: GLP-1 Agonism: Stimulates glucose-dependent insulin secretion, suppresses glucagon release, slows gastric emptying, and reduces appetite via central... Read more...
BAC Water: Why Reconstitution Matters & How to Do It Correctly
What is Bacteriostatic Water? Bacteriostatic Water (BAC Water) is sterile water for injection containing 0.9% benzyl alcohol as a preservative. The benzyl alcohol inhibits the growth of most bacteria, allowing the solution to be used multiple times from the same vial over an extended period — typically up to 28 days after first use. It is the standard diluent used in research settings for reconstituting lyophilised (freeze-dried) peptides. Why BAC Water and Not Regular Water? Using the correct diluent is critical to both the stability and sterility of your reconstituted... Read more...
GHK-Cu: Skin Regeneration & Anti-Ageing Research Guide
What is GHK-Cu? GHK-Cu (Copper Peptide GHK-Cu) is a naturally occurring tripeptide — glycyl-L-histidyl-L-lysine — bound to a copper ion. First isolated from human plasma in 1973, it is found in blood, saliva, and urine, and plays a critical role in wound healing, skin regeneration, and tissue remodelling. Plasma concentrations of GHK-Cu decline significantly with age, correlating with reduced regenerative capacity. Mechanism of Action GHK-Cu operates through several interconnected pathways. It stimulates collagen, elastin, and glycosaminoglycan synthesis, directly improving skin structure and elasticity. It activates antioxidant enzymes, reduces oxidative stress,... Read more...
TB-500: Research & Injury Healing Guide
What is TB-500? TB-500 is a synthetic analogue of Thymosin Beta-4, a naturally occurring peptide found in high concentrations in blood platelets, wound fluid, and various tissues throughout the body. It plays a central role in the body's natural healing and recovery processes, making it one of the most researched peptides for injury repair and performance recovery. Mechanism of Action TB-500 works primarily by upregulating actin — a protein essential for cell structure and movement. By promoting actin polymerisation, TB-500 facilitates cell migration to injury sites, accelerating tissue repair. It... Read more...
BPC-157: Research & Tissue Repair Guide
What is BPC-157? BPC-157 (Body Protection Compound-157) is a synthetic pentadecapeptide derived from a protective protein found in human gastric juice. Comprising 15 amino acids, it has been extensively studied for its remarkable regenerative and cytoprotective properties across a wide range of tissues — from muscle and tendon to gut and neurological systems. Mechanism of Action BPC-157 exerts its effects through multiple pathways. It upregulates growth hormone receptors, promotes angiogenesis (the formation of new blood vessels), and modulates nitric oxide synthesis. It also interacts with the dopaminergic and serotonergic systems,... Read more...