Immune research peptides in Australia
The immune range is made up of two thymic peptides: thymosin alpha-1, a defined 28-residue sequence registered as thymalfasin in over thirty countries though not in Australia, and thymalin, a calf-thymus polypeptide complex out of the Soviet bioregulator program. Research on both looks at T-cell maturation and at immune function as the body ages.
Compounds in this category
Thymalin
Polypeptide complex extracted from calf thymus
Thymalin is a blend of low-molecular-weight polypeptides drawn from calf thymus, developed in the Soviet Union in the 1970s alongside the synthetic dipeptide Thymogen. Most of its literature traces to the St Petersburg Institute of Bioregulation and deals with restoring immune function in ageing. Russian cohort studies recorded fewer infections and lower mortality among elderly participants across multi-year follow-up, with rodent studies reporting immune and thyroid endpoints.
Thymosin Alpha-1
28-amino-acid thymic peptide immunomodulator
Thymosin alpha-1 is a 28-residue peptide first isolated from thymus tissue. It encourages T-cell maturation and switches on dendritic cells, and in the form of thymalfasin it is an approved medicine in more than 30 countries for hepatitis B and as a vaccine adjuvant. Hepatitis B and C trials recorded better viral response in some studies, one large sepsis trial reported lower mortality, and vaccine-adjuvant studies noted higher antibody titres in older adults.
Immune Research at a glance
| Compound | Class | Formats | From | Studied for |
|---|---|---|---|---|
| Thymalin | Polypeptide complex extracted from calf thymus | 10mg | $119.99 | T-cell differentiation, Immunosenescence |
| Thymosin Alpha-1 | 28-amino-acid thymic peptide immunomodulator | 5mg | $179.99 | T-cell maturation, Dendritic-cell activation |
Thymosin alpha-1
Acting through Toll-like receptors 2 and 9 on dendritic cells and precursor T cells, thymosin alpha-1 raises IL-2 and interferon output. Published trials span hepatitis B and C, sepsis and use as a vaccine adjuvant in older adults, and it was examined for lymphopenia in severe COVID-19. It comes as a 5mg vial reconstituted with 1 mL of bacteriostatic water.
Thymalin
Rather than a single sequence, thymalin is defined by its process, and its literature, from the St Petersburg Institute of Bioregulation, reports fewer infections and lower mortality in elderly cohorts followed over long periods, though independent replication is thin. It is sold as a 10mg vial.
Where they stand legally in Australia
Thymalfasin holds registrations in many countries but not with the TGA, and thymalin is not registered anywhere in the West. Supply for laboratory use is lawful; neither is approved for human use here.
Frequently asked questions
How does thymosin alpha-1 compare with TB-500?
Both come from thymosin but are otherwise unrelated: alpha-1 modulates immunity, while TB-500 is a repair peptide that works on the actin cytoskeleton.
Thymosin alpha-1 or thymalin?
One is a defined single sequence with registered use abroad, the other a natural extract backed by a Russian cohort literature.
Are immune peptides legal in Australia?
Supply for laboratory use is lawful; neither is approved for human use.
Research use only: every product in this category is intended for in-vitro laboratory research. Not for human or veterinary use.