PEPTIDE GLOSSARY
A comprehensive guide to understanding the essential scientific terminology in the world of research peptides and biohacking.
A
Bacteriostatic Water (BAC Water)
Sterile water containing 0.9% benzyl alcohol as a preservative. It is used to reconstitute peptides because it inhibits bacterial growth, allowing the reconstituted solution to remain stable for weeks when refrigerated.
Amino Acid
The building blocks of peptides and proteins. There are 20 standard amino acids that combine in various sequences to create peptides. Each amino acid has a unique structure that determines the properties of the peptide.
Angiogenesis
The formation of new blood vessels from existing vessels. Some peptides like BPC-157 promote angiogenesis, which supports tissue healing by improving blood supply to damaged areas.
AOD-9604
A synthetic peptide fragment (amino acids 177-191) of human growth hormone. Primarily investigated for its potential to stimulate lipolysis (fat breakdown) without the growth-promoting effects of full HGH.
B
Bioavailability
The proportion of a substance that enters circulation and is able to have an active effect. Subcutaneously administered peptides typically have higher bioavailability than oral ones due to digestive breakdown.
BPC-157 (Body Protection Compound-157)
A synthetic peptide derived from a protein found in human gastric juice. It consists of 15 amino acids and is investigated for its tissue healing, intestinal protection, and anti-inflammatory effects.
C
Certificate of Analysis (COA)
A document provided by a testing laboratory that verifies the identity, purity, and quality of a peptide batch. It should include HPLC purity, mass spectrometry data, and batch information.
CJC-1295
A synthetic analog of Growth Hormone-Releasing Hormone (GHRH). Available in two forms: with DAC (Drug Affinity Complex) for an extended half-life, and without DAC (also called Mod GRF 1-29) for a shorter, pulsatile action.
D
DAC (Drug Affinity Complex)
A modification added to some peptides (such as CJC-1295 with DAC) that allows them to bind to albumin in the blood, dramatically extending their half-life from minutes to days.
Degradation
The breakdown of a peptide's molecular structure over time, caused by factors such as heat, light, moisture, or bacterial contamination. Proper storage minimizes degradation.
E
Endogenous
Naturally produced within the body. For example, growth hormone is an endogenous hormone, while synthetic GHRP peptides stimulate the release of this endogenous hormone.
Peptide Bond
The chemical bond formed between amino acids in a peptide chain. It is created when the carboxyl group of one amino acid bonds with the amino group of another, releasing water.
Epitalon (Epithalon)
A synthetic tetrapeptide (4 amino acids) studied for its potential to activate telomerase, an enzyme involved in cellular aging. Research focuses on longevity and anti-aging applications.
Mass Spectrometry (MS)
An analytical technique that measures the mass-to-charge ratio of molecules. In peptide testing, it confirms that the molecular weight matches the expected peptide, verifying identity.
G
GHK-Cu (Copper Peptide)
A tripeptide (3 amino acids) that occurs naturally in human plasma and binds to copper. Investigated for wound healing, skin regeneration, and collagen synthesis.
GHRH
Growth Hormone-Releasing Hormone. A hormone produced by the hypothalamus that signals the pituitary gland to release growth hormone. Analogs such as CJC-1295 mimic this signaling.
GHRP
Growth Hormone-Releasing Peptide. A class of synthetic peptides that stimulate growth hormone release through the ghrelin receptor. Examples include Ipamorelin, GHRP-6, and GHRP-2.
GLP-1
Glucagon-Like Peptide-1. A hormone produced in the intestines that regulates blood sugar and appetite. GLP-1 agonists such as Semaglutide and Tirzepatide mimic this hormone.
H
HPLC
High-Performance Liquid Chromatography. An analytical technique used to separate and measure compounds. It determines purity by identifying what percentage of the sample is the target peptide versus impurities.
I
IGF-1 (Insulin-like Growth Factor 1)
A hormone produced primarily in the liver in response to growth hormone. Many effects of GH are mediated through IGF-1.
Ipamorelin
A selective GHRP that stimulates growth hormone release without significantly affecting cortisol, prolactin, or appetite. Considered one of the "cleanest" GH secretagogues.
L
Lyophilization
A preservation process that removes water from peptides by freezing them and applying a vacuum. Lyophilized peptides are stable powders that must be reconstituted before use.
M
MK-677 (Ibutamoren)
Not technically a peptide, but a small molecule that mimics ghrelin and stimulates GH release orally. Often discussed alongside peptides due to similar effects.
Mod GRF 1-29
Modified Growth Releasing Factor (amino acids 1-29), also known as CJC-1295 without DAC. A short half-life analog used for liberación de GH pulsatile action.
P
Collagen Peptides
Short amino acid chains derived from collagen protein. Used for skin and joint support. Different from research peptides as they are taken as nutritional supplements.
Lyophilized Peptide
A peptide in freeze-dried powder form. It is the most stable form for storage and shipping. It must be reconstituted before use in research.
Purity
The percentage of a peptide sample that is the target compound versus impurities. Research-grade peptides typically have >98% purity.
Q
Research Chemical
A compound sold exclusively for laboratory research purposes, not approved for human or veterinary use. Most synthetic peptides fall into this category.
R
Reconstitution
The process of dissolving lyophilized peptide powder in bacteriostatic water to create an injectable solution. Requires careful technique to avoid damaging the peptide.
S
Semaglutide
A GLP-1 receptor agonist. It works by mimicking the GLP-1 hormone to regulate blood sugar and reduce appetite.
Synergy
When two or more compounds produce effects greater than the sum of their individual effects. For example, combining a GHRP with a GHRH produces a synergistic GH release.
Subcutaneous (SubQ)
Administration method where a substance is injected into the layer of fatty tissue under the skin. Most peptides are administered via this route.
T
TB-500 (Thymosin Beta-4)
A synthetic version of a naturally occurring 43-amino acid peptide. Investigated for its systemic healing effects, cell migration, and tissue repair throughout the body.
Tesamorelin
A synthetic GHRH analog approved for reducing visceral adipose tissue. It stimulates the natural release of growth hormone from the pituitary gland.
Tirzepatide
A dual GIP/GLP-1 receptor agonist. It represents a new class of metabolic peptides with dual action for blood sugar and weight management.
V
Half-Life
The time it takes for half of a substance to be eliminated from the body. Peptide half-lives range from minutes (GHRPs) to days (CJC-1295 DAC), affecting dosing frequency.