Cortexin vs Thymosin Alpha-1

A detailed comparison to help you understand the differences and choose the right peptide for your research goals.

Cortexin

Cortexin is a polypeptide complex derived from pig brain cortex, used clinically in Russia and Eastern Europe for neurological conditions including stroke recovery, traumatic brain injury, and cognitive decline.

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Thymosin Alpha-1

Thymosin Alpha-1 is a peptide naturally produced by the thymus gland that plays a crucial role in immune system modulation. It is approved in over 35 countries for various conditions including hepatitis B and C.

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Side-by-Side Comparison

Aspect	Cortexin	Thymosin Alpha-1
Dose Range	10 mg–20 mg	1.6 mg–3.2 mg
Frequency	1x daily	Less than daily
Cycle Length	1–2 weeks	4–12 weeks
Route	intramuscular	subcutaneous
Mechanism	Contains a mixture of neuropeptides and amino acids that support neuronal metabolism, provide neuroprotection, and enhance synaptic transmission. Specific mechanisms not fully characterized.	Enhances T-cell function and maturation, stimulates dendritic cell activity, and modulates cytokine production. Promotes the differentiation of stem cells into mature T lymphocytes.
Typical Dosage	Clinical protocols: 10mg intramuscularly once daily for 10-20 days. May be repeated after 3-6 month interval.	Clinical dosing typically ranges from 1.6mg to 6.4mg administered subcutaneously 2-3 times weekly. Research protocols may vary.
Administration	Intramuscular injection. Comes as lyophilized powder requiring reconstitution. Treatment given in courses rather than continuously.	Subcutaneous injection. Often used in cycles or as part of comprehensive immune support protocols.
Side Effects	Generally well-tolerated. May cause injection site reactions or mild allergic responses in sensitive individuals.	Generally well-tolerated. Rare side effects include injection site reactions, mild flu-like symptoms, and temporary fatigue.
Best For	Recovery & Healing Cognitive Performance	Recovery & Healing