Immune & Systemic
Immune-modulating and host-defense peptides are discussed for their effect on immune signaling. Several have meaningful clinical literature in specific regions; evidence is labeled accordingly.
LL-37
AnimalThe body's principal cathelicidin antimicrobial peptide, central to host defense and studied for antimicrobial and wound-healing roles — with a notably double-edged biology.
Thymosin Alpha-1
HumanAn immune-modulating peptide naturally produced by the thymus; an approved drug (thymalfasin / Zadaxin) in a number of countries for specific clinical indications.
Thymosin Beta-4
AnimalA naturally occurring peptide central to cell migration and tissue repair — the parent molecule of the commonly discussed fragment TB-500.
Thymulin
AnimalA zinc-dependent thymic peptide involved in T-cell function, studied for immune-modulating and anti-inflammatory effects, largely preclinically.