Crystagen

Immune system Research only Preliminary Synthetic short peptide (Cytogen)

Also called EDP peptide

A three-amino-acid Khavinson peptide associated with the thymus and immune system. Reports describe support for T-cell function and immune cell growth with age, and one study noted fewer respiratory infections in athletes.

Evidence at a glance

Evidence
Preliminary — Very little published work
Status
Research compound only
Dosing
No human study has set a dose

Thin literature, one group.

What studies report

How it works

A Khavinson short peptide: at two to four amino acids it is small enough to pass through cell and nuclear membranes intact. The proposed mechanism is that it binds specific sites on nuclear DNA and changes which genes are switched on in its target tissue, rather than acting on a surface receptor the way most peptides do.

Small enough to pass through and act on DNA in the nucleus

Where it acts

Thymus

The library groups this compound under Immune system. The diagram shows that target, not every tissue it reaches.

Illustrated

A group of lymphocytes in a lymphoid tissue microenvironment with fine reticular fibres.

AI-generated subject illustration; not a depiction of the compound or evidence of its effects.

Why people take it

Immune supportResistance to infection

Reasons people seek it out — not a list of proven effects.

Status: Limited data, mostly from one research group.

Route
Subcutaneous injection, or oral capsule depending on the preparation
Sequence
Glu-Asp-Pro
Formula
C14H21N3O8
Molecular weight
359.3 g/mol
Available as
20 mg

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Educational information only. Nothing here is medical advice, a dosing protocol, or a recommendation to use any compound. Most entries describe substances not approved for human use. Talk to a licensed clinician before acting on anything you read here. How to read these entries.