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Immunepreclinical

Thymalin

Thymus peptide complex
Immune
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Category
Immune
Evidence grade
D
PubMed records
234
Female-tagged
75
Sex-analysis
0
CAS
—
D
Evidence grade D, Preclinical / animal evidence only across 234 indexed studies. No human trial data. How grades work →
Female evidence: Extrapolated
Thymalin: of 234 PubMed records, 75 are tagged as including female subjects and 0 carry a sex-analysis tag.Counts reflect PubMed records as of 2026-07-21. “Female” uses the Female MeSH filter and “sex-analysis” the Sex Factors MeSH filter, automated proxies pending manual study-level review. Methodology →

Overview

Thymalin is a polypeptide complex derived from thymic tissue, prepared as a research preparation for use in immunology laboratories. As a thymus-derived material, it belongs to a family of peptide preparations studied for their modeled relationship to the regulatory functions of the thymus gland, and its composition lends it to work in cell-culture and preclinical systems.

In research, thymalin has been studied for its modeled influence on T-lymphocyte differentiation and maturation, on the balance of immune-cell populations, and on cytokine-regulation pathways in vitro. Investigators examining immune-homeostasis mechanisms have used it as a tool compound to probe regulatory dynamics within the thymic-immune axis.

Thymalin is supplied for in-vitro and laboratory research only, not for human or veterinary use. Its value for an immunology catalog lies in this focus on regulatory and homeostatic modeling. Whether these mechanisms translate to female physiology remains an open research question; our evidence review tracks how many of the underlying studies included women.

Summary

Thymalin is a thymus-derived peptide preparation studied largely within the Russian gerontology and 'peptide bioregulator' tradition for immune and aging-related effects. Human reports exist but come mostly from a single research lineage with limited independent replication, and none isolate female-specific outcomes.

Evidence in women

Menstrual cycle
Unstudied
No study examines menstrual cycle interactions.
Pregnancy & lactation
Unstudied
No pregnancy or lactation safety data exist; absence of harm data is not evidence of safety.
Hormonal interactions
Unstudied
No data on estrogen, thyroid, or contraceptive interactions.
Perimenopause & menopause
Unstudied
Despite the aging framing, no menopause-specific data exist.
Sex differences
Unstudied
Human reports included women but were not analyzed by sex and lack independent replication.

Mechanism

A mixture of thymic polypeptides proposed to modulate T-cell-mediated immunity and neuroendocrine-immune signaling.

Reported dosing & routes

◐

We don't give dosing or medical advice. The figures below describe what was used in published research, not a recommendation. Decide with your clinician.

Reported range (literature)Russian gerontology protocols report short intramuscular courses; no standardized or independently validated human dose.
Routesintramuscular
Female-specific dosingNot established

Contraindications: insufficient independently-verified human data to characterize

Side effects

Reported in the research literature. Sex-specific incidence has not been separately analysed in the available records.

insufficient rigorous human data to characterize

Thymalin reconstitution calculator

Enter this vial's amount, the bacteriostatic water you add, and a target amount to get the concentration and the U-100 syringe units to draw. Handling arithmetic for research use, not a dose recommendation.

Reconstitution

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Draw for Thymalin

5
units on a U-100 insulin syringe
020406080100
U-100 insulin syringe — 1 mL = 100 units
That's 0.05 mL drawn to the 5-unit mark.
Concentration5 mg/mL (5,000 mcg/mL)
Volume to draw0.05 mL
Doses per vial40

Reference chart at 5 mg/mL

Target amountVolume (mL)U-100 units
100 mcg0.02 mL2
250 mcg0.05 mL5
500 mcg0.1 mL10
750 mcg0.15 mL15
1000 mcg0.2 mL20

Research-use arithmetic only. This tool converts a vial amount, diluent volume, and a target amount into a concentration and syringe draw for laboratory handling. It is not dosing guidance, a recommendation, or a claim of safety or efficacy, and it does not account for overfill, dead space, or peptide purity. Nothing here is medical advice. “U-100” means 100 units = 1 mL; confirm your syringe graduation before measuring. See the reconstitution & storage handbook for handling detail.

Frequently asked questions

Answers drawn only from Thymalin's research facts and, where reviewed, its sex-disaggregated evidence. Nothing here is medical advice, dosing, or a claim of safety or efficacy.

What is Thymalin?

Thymalin, also known as Thymus peptide complex, is a research compound in our immune category. Thymalin is a thymus-derived peptide preparation studied largely within the Russian gerontology and 'peptide bioregulator' tradition for immune and aging-related effects.

Is Thymalin studied in women?

Thymalin: of 234 PubMed records, 75 are tagged as including female subjects and 0 carry a sex-analysis tag. We grade this extrapolated: women appear in the record, but no study is tagged for a sex-specific analysis, so female-relevant conclusions are inferred from mixed or male data rather than measured in women. See our methodology.

Has Thymalin been studied during pregnancy or breastfeeding?

Unstudied. No pregnancy or lactation safety data exist; absence of harm data is not evidence of safety. This is not a safety clearance or a recommendation. Vera, our research chat, deliberately hard-stops on pregnancy, breastfeeding, and trying-to-conceive questions rather than answer them.

What evidence grade does Thymalin have, and why?

Thymalin carries evidence grade D. Preclinical / animal evidence only across 234 indexed studies. No human trial data.. Grades are derived from the research record, never hand-assigned; see how grades work.

Is there a female-specific dose for Thymalin?

No. A female-specific dose for Thymalin is not established, and this site does not provide dosing or medical advice. Any figures we show describe what published research used, not a recommendation. Decide anything about use with a qualified clinician.

How is Thymalin administered in research?

In the published literature, Thymalin is administered via intramuscular. Reported dose ranges on the Dosing tab describe what studies used for laboratory research, not a protocol for people. We don't provide dosing.

What side effects have been reported for Thymalin?

Effects reported in the research literature include insufficient rigorous human data to characterize. Sex-specific incidence has not been separately analysed in the available records, so these are not broken out for women.

How should Thymalin be stored and handled?

Thymalin sold for research is supplied as a lyophilized (freeze-dried) powder. Lyophilized peptides are generally kept cold and dry, at roughly -20°C for longer-term storage and 2-8°C short-term, protected from light. Once reconstituted they are typically refrigerated and used within a short window, avoiding repeated freeze-thaw cycles. This is general laboratory handling for research use only, not a directive for human use. Always follow the handling and purity details on the product's Certificate of Analysis.

Where can I buy Thymalin for research?

For laboratory research use, Thymalin is available from our research-use partner, Aurevena Research. Applying code research15 takes 15% off. We may earn a commission when you purchase through this link, at no extra cost to you. Products are for laboratory research use only.

Buy Thymalin at Aurevena Research
Research-use supplier: Thymalin is available from our research-use vendor for laboratory use. Code research15 for 15% off, applied automatically at checkout. We may earn a commission when you purchase through this link, at no extra cost to you. Products are for laboratory research use only.
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Citations (PMID)

12577695 · 12374906

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Educational information for laboratory and research use only. Not medical advice, a recommendation, or a claim of safety or efficacy; no personal dosing. “Unstudied” means no qualifying study was found, not that a compound is safe or unsafe.