Glossary

The building blocks of peptides and proteins. Your body uses 20 standard amino acids to construct every peptide sequence.

A peptide that kills or inhibits bacteria, viruses, or fungi. LL-37 is a well-known example.

A fragment of human growth hormone designed to stimulate fat breakdown without affecting blood sugar or IGF-1 levels.

Sterile water with 0.9% benzyl alcohol used to reconstitute lyophilized peptides. The preservative prevents bacterial growth in the vial.

A short peptide (typically 2–4 amino acids) that signals specific organs or tissues to repair and regenerate. Examples include Epitalon and Thymalin.

A synthetic peptide derived from a protective protein in stomach juice. Widely researched for tissue repair, gut healing, and injury recovery.

A lab report from a third-party testing facility confirming a peptide's identity, purity, and sometimes sterility. Always request one before purchasing.

A growth hormone releasing hormone (GHRH) analog. The 'no DAC' version provides short pulses; the 'with DAC' version provides a longer, sustained release.

A defined period of time during which a peptide is administered, followed by an off period. Common cycles are 8 weeks on, 8 weeks off.

The amount of peptide administered in a single injection, usually measured in micrograms (mcg) or milligrams (mg).

Delta Sleep-Inducing Peptide. A neuropeptide studied for its ability to promote deep, restorative sleep and reduce stress.

A synthetic version of Epithalamin, a bioregulator that activates telomerase and is studied for longevity and cellular aging.

A compound that produces some of the metabolic benefits of exercise without physical activity. SLU-PP-332 is an example.

A protein that inhibits myostatin, a muscle growth limiter. Follistatin 344 is a research peptide version studied for muscle hypertrophy.

How often a peptide is administered. Examples: daily, 5 days on / 2 days off, 3x per week, or once weekly.

A compound that triggers the release of growth hormone from the pituitary gland. Ipamorelin, CJC-1295, and Hexarelin are examples.

A copper peptide composed of glycine, histidine, lysine, and a copper ion. Studied for skin repair, collagen production, hair growth, and wound healing.

A compound that mimics glucagon-like peptide-1, a hormone that regulates appetite and blood sugar. Semaglutide and Tirzepatide are examples.

Human Chorionic Gonadotropin. A peptide hormone that mimics LH and supports testicular function and fertility, commonly used alongside testosterone therapy.

A potent growth hormone secretagogue that stimulates GH release more aggressively than Ipamorelin, but may also increase cortisol and prolactin.

Insulin-like Growth Factor 1. A hormone with structural similarity to insulin that plays a key role in childhood growth and adult muscle repair.

A small syringe marked in 'units' (100 units = 1 mL) with a very thin, short needle. The standard tool for peptide injections.

A selective growth hormone secretagogue that releases GH without significantly raising cortisol, prolactin, or appetite. One of the mildest GH peptides.

A tripeptide (Lysine-Proline-Valine) fragment of alpha-MSH. Studied for gut inflammation, immune modulation, and skin healing.

The only known human cathelicidin antimicrobial peptide. Part of the innate immune system and studied for infection resistance and immune modulation.

Freeze-dried. Peptides are shipped as a dry powder or cake in a vial because they are stable in solid form but degrade faster once dissolved in liquid.

The specific biochemical interaction through which a peptide produces its effect. For example, BPC-157 promotes angiogenesis (formation of new blood vessels).

A synthetic analog of alpha-melanocyte stimulating hormone. Melanotan 1 and 2 are studied for skin pigmentation and (in MT2) libido enhancement.

A mitochondrial-derived peptide that mimics exercise at the cellular level, improving insulin sensitivity and metabolic function.

A unit of liquid volume. Most peptide reconstitution protocols call for 1–3 mL of bacteriostatic water. 1 mL equals 100 units on an insulin syringe.

One millionth of a gram. Peptide doses are typically measured in micrograms. 1,000 mcg = 1 mg.

One thousandth of a gram. Vial sizes are usually listed in milligrams (e.g., 5 mg, 10 mg vials).

A protein that limits muscle growth. Inhibiting myostatin (with compounds like Follistatin) allows muscles to grow beyond their natural genetic ceiling.

Nicotinamide Adenine Dinucleotide. A coenzyme found in all living cells, essential for energy metabolism and DNA repair. Supplementation is studied for aging and cellular health.

A version of CJC-1295 without Drug Affinity Complex. It provides short, natural pulses of growth hormone release rather than a constant elevated level.

A short chain of amino acids, typically fewer than 50. Longer chains are generally classified as proteins. Peptides act as signaling molecules in the body.

A synthetic melanocortin peptide studied for sexual arousal and libido in both men and women. Works on the central nervous system rather than blood flow.

High Performance Liquid Chromatography. A lab test that separates and quantifies the components of a peptide sample to confirm it contains the correct compound and minimal impurities.

The process of adding bacteriostatic water to a lyophilized peptide vial to create an injectable liquid solution.

A triple agonist peptide that activates GLP-1, GIP, and glucagon receptors. Studied for powerful fat loss and metabolic improvement.

A synthetic nootropic peptide with anxiolytic (anti-anxiety) properties. Studied for mood stabilization and immune modulation without sedation.

A GLP-1 receptor agonist originally developed for type 2 diabetes, now widely used for weight management due to its powerful appetite-suppressing effects.

A Russian-developed nootropic peptide derived from ACTH. Studied for focus, neuroprotection, and cognitive enhancement.

A compound that selectively clears senescent (aged, non-dividing) cells from the body. FOXO4-DRI is a research senolytic peptide.

A GHRH analog that stimulates the pituitary to release growth hormone. Often used as a more affordable alternative to direct GH therapy.

An unintended and usually undesirable effect of a compound. Side effects vary by peptide, dose, and individual sensitivity.

A mitochondria-targeted peptide that protects cardiolipin and improves mitochondrial function. Studied for heart health and cellular energy.

A combination of two or more peptides or compounds used together to achieve synergistic effects.

Injected just under the skin. Most peptides are administered subcutaneously using a short insulin needle. Absorption is slower and steadier than intramuscular injection.

A synthetic version of Thymosin Beta-4, a naturally occurring peptide involved in wound healing, cell migration, and tissue regeneration.

A GHRH analog that specifically stimulates growth hormone release. Studied for reducing visceral fat and improving body composition.

When in the day a peptide should be administered. Some peptides are best taken in the morning (AM), others at night (PM), and some around workouts.

A dual GLP-1/GIP receptor agonist. Combines appetite suppression with improved insulin sensitivity for significant weight loss.

The markings on an insulin syringe. 100 units equals 1 mL. Our Dosage Calculator converts mcg doses into the exact unit mark to pull the plunger to.

Vasoactive Intestinal Peptide. A neuropeptide with broad effects on the immune system, inflammation, and vascular function. Studied for immune modulation and gut health.

The small glass bottle containing the lyophilized peptide powder. It has a rubber stopper designed for needle entry.