Master Your
Peptide Knowledge

Peptides are short chains of amino acids (typically 2–50 amino acids long) linked by peptide bonds. They act as signaling molecules in the body, influencing a wide range of biological processes including growth hormone release, tissue repair, inflammation, metabolism, and skin health. Unlike full proteins, their smaller size allows them to be absorbed and utilized efficiently.

Reconstitution is the process of adding bacteriostatic water (sterile water with 0.9% benzyl alcohol) to a lyophilized (freeze-dried) peptide vial to create an injectable solution. The amount of water you add determines the concentration, which directly affects how much liquid you need to draw per dose. Using our dosing calculator above ensures accurate measurements every time. Always swirl gently — never shake — to avoid damaging the peptide bonds.

Unreconstituted (powder) peptides should be stored in a freezer or refrigerator away from light and moisture. Once reconstituted with bacteriostatic water, vials should be refrigerated at 36–46°F (2–8°C) and are typically stable for 4–6 weeks, though this varies by peptide. Never freeze reconstituted peptides, and always keep them away from heat and direct sunlight.

Insulin syringes are the standard for subcutaneous peptide administration. They come in three common sizes: 100-unit (1 mL), 50-unit (0.5 mL), and 30-unit (0.3 mL). Smaller syringes provide more precise measurements for small doses. For most peptide protocols, a 100-unit or 50-unit syringe with a 29–31 gauge needle is standard. Our dosing calculator adjusts results based on your syringe selection.

Legality varies by country and jurisdiction. In the United States, many peptides are sold as research chemicals and are legal to purchase for research purposes. Some peptides, like Tesamorelin, are FDA-approved medications available by prescription. Regulations are evolving, and it's important to stay informed about your local laws. This site provides educational information only — always ensure compliance with your local regulations.

Look for suppliers who provide third-party Certificate of Analysis (COA) testing, use proper cold-chain shipping, have transparent labeling with clear mg amounts, and maintain good manufacturing practices. Purity should be 98% or higher for research-grade peptides. Companies like Valor Sciences provide third-party testing documentation to verify product quality and purity.