What is the difference between Thymalin and Thymulin?

Thymalin: Thymic peptide bioregulator; restores thymic function and T-cell production; modulates cytokine balance; shown to extend lifespan in animal models Thymulin: Zinc-dependent peptide that promotes T-lymphocyte differentiation, enhances natural killer cell activity, and regulates cytokine balance. Requires zinc cofactor for biological activity.

Is Thymalin FDA approved?

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

Is Thymulin FDA approved?

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

How is Thymalin administered in research settings?

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

How is Thymulin administered in research settings?

In research settings, Thymulin is typically administered via the subcutaneous route. PeptideBase does not provide dosing or administration instructions.

Home›Research›Compare›Thymalin vs Thymulin

Peptide Comparison

Thymalin vs Thymulin

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

Both are Immune & Thymic peptides.

Thymalin

Thymus peptide

LongevityNot EvaluatedResearch Only

Half-life: Unknown

11 providers listed

Full Thymalin profile →

Thymulin

FTS

RecoveryNot EvaluatedResearch Only

26 providers listed

Full Thymulin profile →

Bottom line

Thymalin carries stronger published evidence (RCT, 2 key studies) than Thymulin (Review, 2); both are research compounds.

Quick Verdict

Thymalin

Evidence

Emerging Clinical

Thymulin

Evidence

Preclinical

Which One Should You Choose?

Your goal	Better option
Stronger clinical evidence	Thymalin
More provider options (11 vs 26)	Thymulin

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

Side-by-Side Comparison

Thymalin

Thymulin

Mechanism Family

Immune & Thymic

Half-life

Unknown

—

FDA Status

not evaluated

Admin Routes

subcutaneous, intramuscular

subcutaneous

Availability

Research Only

Providers

11 listed

26 listed

Avail. Notes

Russian thymic peptide bioregulator (Khavinson Institute). Distinct from Thymosin Alpha-1. Not FDA-approved. Not on any FDA list. Research chemical in US.

—

Research Evidence

Thymalin

Emerging ClinicalRCT · 2 key studies · dated evidence base — most recent 2003

Thymulin

PreclinicalReview · 2 key studies · dated evidence base — most recent 2009

Research Citations

Thymalin

RCT2003 · Neuroendocrinology Letters

Thymalin and epithalamin increase the lifespan of elderly people

Review2002 · Advances in Gerontology

Peptide bioregulators and melatonin inhibit the development of age-related pathologies

Thymulin

Review2009 · Annals of the New York Academy of Sciences

The thymus-neuroendocrine axis: physiology, molecular biology, and therapeutic potential of the thymic peptid…

Animal2007 · International Immunopharmacology

In vivo treatment with a nonapeptide thymic hormone, facteur thymique serique (FTS), ameliorates chronic coli…

About Thymalin

Thymic peptide bioregulator; restores thymic function and T-cell production; modulates cytokine balance; shown to extend lifespan in animal models

Research Areas

immune restorationthymus function supportanti-agingimmune modulation

About Thymulin

Zinc-dependent peptide that promotes T-lymphocyte differentiation, enhances natural killer cell activity, and regulates cytokine balance. Requires zinc cofactor for biological activity.

Research Areas

immune modulationT-cell maturationNK cell supportanti-inflammatory

Safety Profile

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

Thymalin

Reported (Unverified — Pending Clinical Review)

autoimmune disease (use with caution)organ transplant (immunosuppression)

No established clinical contraindications

Thymulin

Absolute Contraindications

Under clinical review

Being verified by our medical team before we display contraindications for this peptide.

Price (per mg)

Thymalin

$5.05/mg

$4.65 – $6.04 range

8 vendors

View price index →Find providers →

Thymulin

Not enough vendor pricing yet.

Find Providers

Where to source these peptides

Providers offering

Thymalin

11 listed

Browse directory →

Providers offering

Thymulin

26 listed

Browse directory →

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

More Immune & Thymic Comparisons

Browse all peptides →

Educational research tools — not medical advice.

Cite this page

Data last updated July 20, 2026

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

PeptideBase. (2026). Thymalin vs Thymulin — Per-mg Price Comparison. Retrieved July 22, 2026, from https://peptidebase.io/peptides/compare/thymalin/thymulin

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