Compare Peptides
Select any two compounds for a side-by-side comparison of mechanism, uses, risks, and FDA regulatory status.
Popular comparisons
Thymosin Alpha-1 + Thymalin Protocol
TA1/Thymalin Stack, Immune Peptide Protocol
A combination protocol pairing Thymosin Alpha-1 (a 28-amino acid thymic peptide) with Thymalin (a thymic extract) for comprehensive immune system modulation. Based on the work of Vladimir Khavinson, this stack targets both innate and adaptive immunity. Used in integrative medicine for immune optimization, post-illness recovery, and longevity protocols.
A synthetic tripeptide (Glu-Asp-Arg) developed by the St. Petersburg Institute of Bioregulation and Gerontology — the same institution behind Epitalon. Pinealon is designed to target the central nervous system and pineal gland, with research focused on neuroprotection, cognitive function, and circadian rhythm regulation.
Thymosin Alpha-1 activates dendritic cells, enhances T-cell maturation, and modulates Th1/Th2 balance. Thymalin provides a broader spectrum of thymic peptides that support thymic function and T-cell diversity. Together, they address both the specific (TA1) and general (Thymalin) aspects of thymic immune regulation.
Penetrates the blood-brain barrier and accumulates in neurons. Modulates gene expression related to neuronal survival and function. Reduces oxidative stress in neural tissue. Appears to regulate melatonin synthesis through pineal gland activity, supporting circadian rhythm normalization.
- Comprehensive immune optimization
- Post-viral recovery protocols
- Chronic infection support
- Longevity and immune aging (immunosenescence)
- Pre-travel immune preparation
- Cognitive enhancement and memory
- Neuroprotection
- Sleep quality improvement
- Age-related cognitive decline
- Stroke recovery support (preliminary research)
- Injection site reactions from both peptides
- Potential for immune overstimulation
- Autoimmune flare risk in predisposed individuals
- Cost — both peptides required
- Limited data on combination safety
- Very limited independent Western research
- Most studies from Russian institutions
- Long-term safety unknown
- Mechanism not fully characterized
- Injection site reactions
Thymosin Alpha-1 is FDA-approved internationally (Zadaxin) but not in the US. Thymalin has no FDA status. The combination protocol is not FDA-reviewed. Both are available through compounding pharmacies. TA1 is on the 503A Category 1 bulks list.
Not FDA-approved and not on any compounding list. Available as a research chemical. Research base is almost entirely from Russian institutions — independent replication is limited. Not affected by the 2026 regulatory changes.
This comparison is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting any peptide therapy.