Is Cortagen FDA approved?

Cortagen is not evaluated or approved by the FDA. It is discussed for research and educational purposes only, not as medical guidance.

Is Livagen FDA approved?

Livagen is not evaluated or approved by the FDA. It is discussed for research and educational purposes only, not as medical guidance.

How is Cortagen administered in research settings?

In research settings, Cortagen is typically administered via the oral or subcutaneous routes. PeptideBase does not provide dosing or administration instructions.

How is Livagen administered in research settings?

In research settings, Livagen is typically administered via the subcutaneous or intramuscular routes. PeptideBase does not provide dosing or administration instructions.

Home›Research›Compare›Cortagen vs Livagen

Peptide Comparison

Cortagen vs Livagen

Name: Cortagen vs Livagen — Per-mg Price Comparison
Creator: PeptideBase
License: https://peptidebase.io/terms

Both are Longevity & Cellular peptides.

Cortagen

vascular peptide bioregulator

LongevityNot EvaluatedResearch Only

1 providers listed

Full Cortagen profile →

Livagen

Lys-Glu-Asp-Glu

LongevityNot EvaluatedResearch Only

Half-life: Unknown

3 providers listed

Full Livagen profile →

Bottom line

Livagen is carried by more providers on PeptideBase (3 vs 1); otherwise the two are closely matched on the measures we track.

Quick Verdict

Cortagen

Livagen

Which One Should You Choose?

Your goal	Better option
Oral administration option	Cortagen
More provider options (1 vs 3)	Livagen

Research summary only — not medical advice. Consult a qualified provider before making any decisions.

Side-by-Side Comparison

Cortagen

Livagen

Mechanism Family

Longevity & Cellular

Half-life

—

Unknown

FDA Status

not evaluated

Admin Routes

oral, subcutaneous

subcutaneous, intramuscular

Availability

Research Only

Providers

1 listed

3 listed

Avail. Notes

—

Russian liver peptide bioregulator (Lys-Glu-Asp-Gly) from Khavinson Institute. Studied for aging and hepatic function. No FDA approval, no NDA or IND. Research chemical in US.

Research Evidence

Cortagen

Review · 2 key studies · most recent 2021

Livagen

Review · 2 key studies · most recent 2022

Research Citations

Cortagen

Animal2004 · Neuroendocrinology Letters

The effect of short peptides on the expression of genes in the cardiac muscle of old male rats

Review2021 · Molecules

Peptide Regulation of Gene Expression: A Systematic Review

Livagen

Review2022 · International Journal of Molecular Sciences

Bioavailability and Biological Activities of Food-Derived Di- and Tripeptides: In Silico and In Vitro Studies

Review2020 · Stem Cell Reviews and Reports

Short Peptides in the Treatment of Age-Related Diseases

About Cortagen

Brain cortex-derived tetrapeptide that modulates gene expression in neural and cardiac tissue through chromatin regulatory mechanisms; microarray analysis demonstrates broad transcriptional effects following administration.

Research Areas

neuroprotectiongene expression regulationlongevityanti-aging

About Livagen

Tetrapeptide bioregulator for hepatocytes; activates gene expression in liver cells; promotes liver cell regeneration; restores lymphocyte activity via liver-mediated immune pathways

Research Areas

liver cell regenerationhepatoprotectionimmune restoration via liverchromatin activation

Safety Profile

Information below reflects published research data only — not medical advice. Consult a qualified provider before use.

Cortagen

No established clinical contraindications. This is an investigational compound with limited human data and has not been evaluated by the FDA for safety in this context. Consult a qualified clinician.

Livagen

No established clinical contraindications. This is an investigational compound with limited human data and has not been evaluated by the FDA for safety in this context. Consult a qualified clinician.

Price (per mg)

Cortagen

Not enough vendor pricing yet.

Livagen

$3.00/mg

$2.75 – $3.15 range

9 vendors

View price index →Find providers →

Find Providers

Where to source these peptides

Providers offering

Cortagen

1 listed

Browse directory →

Providers offering

Livagen

3 listed

Browse directory →

PeptideBase lists providers for educational research purposes only. Always consult a qualified healthcare professional before obtaining or using any peptide.

More Longevity & Cellular Comparisons

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Educational research tools — not medical advice.

Cite this page

Data last updated August 26, 2026

Free to reference and republish with attribution to PeptideBase. Choose a format:

PeptideBase. (2026). Cortagen vs Livagen — Per-mg Price Comparison. Retrieved September 12, 2026, from https://peptidebase.io/peptides/compare/cortagen/livagen

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