What is the difference between Cortagen and Livagen?

Cortagen: A short synthetic peptide bioregulator (Ala-Glu-Asp-Pro) from the Khavinson 'Cytomax/Cytogen' family, marketed for cartilage and connective-tissue support. Evidence is largely Russian-language and pre... Livagen: Livagen is a synthetic tetrapeptide (Lys-Glu-Asp-Ala / KEDA) from the Khavinson short-peptide 'bioregulator' series, developed at the St. Petersburg Institute of Bioregulation and Gerontology. Markete...

Cortagen vs Livagen

Q: Can you stack Cortagen and Livagen?

Cortagen (recovery) and Livagen (immune) are in different categories and are sometimes researched together in combined protocols. Consult a licensed provider before combining any compounds.

Head-to-head comparison of Cortagen and Livagen — mechanism, side effects, legal status, and pricing.

Cortagen

A short synthetic peptide bioregulator (Ala-Glu-Asp-Pro) from the Khavinson 'Cytomax/Cytogen' family, marketed for cartilage and connective-tissue support. Evidence is largely Russian-language and preclinical.

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Livagen

Livagen is a synthetic tetrapeptide (Lys-Glu-Asp-Ala / KEDA) from the Khavinson short-peptide 'bioregulator' series, developed at the St. Petersburg Institute of Bioregulation and Gerontology. Marketed in Russia primarily as a food-supplement-grade cytomax; not FDA-approved in the US; research-use only.

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Cortagen

Livagen

Where Researchers Are Buying

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COA-verified vendors · trust score ≥70 required · single-vial price — bulk/bundle deals may be lower

Cortagen

Best $/mg

$2.75/mg

PeptidologyB

3 trusted vendors listing

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Livagen

Best $/mg

$2.10/mg

Peptide Supply Co.B

5 trusted vendors listing

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Lab Verification

COA corpus from Disclosed Labs — independently tested batches only.

Cortagen

COAs

99.6%

Avg purity

Labs

Full testing data

Livagen

COAs

99.6%

Avg purity

Labs

Full testing data

Cortagen Research Summary

Primarily Russian institutional studies; no large independent controlled human trials.

Livagen Research Summary

Evidence base is essentially single-lab (Khavinson, Lezhava, and collaborators). In vitro studies on lymphocyte chromatin in elderly subjects and small Russian reports in chronic gastritis and immune senescence. No FDA-registered clinical trials and no Western RCTs.

Key references

Can you stack Cortagen and Livagen?

Cortagen (Recovery) and Livagen (Immune) are in different categories and target different biological pathways. This is a common pattern in multi-compound research protocols. Researchers should monitor the biomarkers from both profiles and watch for interactions listed in each compound’s contraindications. Consult a licensed healthcare provider before combining any research compounds.

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This platform provides informational tools only, not medical advice. This comparison is for educational purposes only. Consult a licensed provider.