Peptide
A short chain of amino acids linked together by chemical bonds, typically containing between 2 and 50 amino acids. Peptides act as signaling molecules in the body, influencing processes like healing, hormone release, and immune function.
Related Terms
Amino Acid
One of 20 naturally occurring building blocks that combine in different sequences to form peptides and proteins. Each amino acid has a unique chemical structure that determines how the resulting peptide will fold and function in the body.
Bioavailability
The proportion of a substance that enters the bloodstream and becomes available to produce its intended effect. A peptide with high bioavailability means more of the administered dose reaches its target, while oral peptides often have low bioavailability because stomach acid breaks them down before absorption.
Half-Life
The amount of time it takes for half of a substance to be broken down or eliminated from the body. A peptide with a short half-life is cleared quickly and may require more frequent dosing, while a longer half-life means the substance remains active longer.
Reconstitution
The process of adding a sterile liquid (usually bacteriostatic water) to a freeze-dried peptide powder to create an injectable solution. Proper reconstitution technique is important to preserve the peptide's structure and ensure accurate dosing.
Subcutaneous Injection
A method of delivering medication by inserting a small needle into the fatty tissue just beneath the skin, commonly in the abdomen or thigh. This route is frequently used for peptides because it allows steady absorption into the bloodstream while bypassing the digestive system.