Immune Peptides
10Thymic peptides, antimicrobial peptides, and immune modulators are studied for their roles in immune system regulation. From Thymosin Alpha-1 used in clinical settings to experimental antimicrobial peptides like LL-37.
KPV
A small peptide derived from a hormone that regulates skin color. It keeps the strong anti-inflammatory and immune-balancing effects of the full hormone without causing skin tanning or sexual side effects. One of the cleanest anti-inflammatory peptides available, and it works when taken by mouth, injected, or applied to the skin. People use it for gut inflammation, skin conditions, and general inflammation.
LL-37
The body's main antimicrobial peptide — a natural part of the immune system that fights bacteria, viruses, and fungi. Beyond fighting germs, it promotes wound healing, helps regulate inflammation, and stimulates new blood vessel growth at injury sites. The body makes it in response to infection or tissue damage. People use it for wound healing and immune support.
RG3
Ginsenoside Rg3 — a bioactive compound derived from Panax ginseng. While not a peptide, it is frequently offered alongside peptide therapies in regenerative medicine clinics for its immune-modulating, anti-inflammatory, and anti-tumor properties. One of the most active compounds in ginseng, with research demonstrating effects on blood vessel formation, immune cell activation, and cancer cell death.
Selank
A lab-made peptide based on a natural immune-signaling peptide. Developed in Russia to help with anxiety and mental sharpness. Works like anti-anxiety medications without the drowsiness or addiction risk, while also supporting brain health and immune function.
Thymalin
A peptide blend extracted from the thymus glands of young animals. The thymus is the gland that helps train your immune cells. This preparation supports thymus activity and helps your body mature T-cells — the immune cells that fight infections and cancer. It's been used in Russian medicine for decades, though Western clinical evidence is still limited.
Thymosin Alpha-1
A peptide your thymus gland naturally produces. It helps regulate T-cells and dendritic cells — key players in your immune system. One of the most clinically validated immune-modulating peptides. It's approved in over 35 countries (sold as Zadaxin) for treating hepatitis B and C and as an immune booster alongside cancer treatment. It's been used for decades in Asia and Europe.
Thymosin Beta-4
The full-length 43-amino-acid peptide naturally produced by the thymus gland — the parent molecule from which TB-500 is derived. Plays a key role in cell movement, tissue repair, wound healing, and reducing inflammation throughout the body. The full-length form may offer broader healing benefits than the TB-500 fragment alone.
Thymulin
A 9-amino-acid peptide naturally produced by the thymus gland that requires zinc to work properly. Distinct from Thymalin (which is a thymic extract mixture). Plays a central role in T-cell development, immune system regulation, and the zinc-thymulin axis that declines with aging. Thymulin levels decrease as the thymus shrinks with age, contributing to immune decline.
Vilon
A synthetic two-amino-acid peptide (Lys-Glu) designed to support the thymus gland and immune system. Studied for immune modulation, thymic rejuvenation, and anti-aging. Part of the Khavinson peptide bioregulator family alongside Thymalin, Epithalon, and Cortexin. Designed to support T-cell development and restore age-related immune decline.
VIP
A natural peptide found throughout the body, especially in the nervous system, gut, and lungs. It widens blood vessels, calms inflammation, and helps balance the immune system. Most studied for chronic inflammatory conditions (like mold illness) and high blood pressure in the lungs, where it tones down excessive inflammatory signaling. People use it for CIRS, mold illness, and similar conditions.