Also known as: Thymus extract, TFX, Thymic factor X
Thymalin is a thymic peptide research compound (not FDA-approved for human use) studied for immune restoration. Thymalin is a polypeptide extract from the thymus gland studied in Russian research for restoring immune function and extending healthspan, particularly in aging populations. Research dose: 10–10 mg daily x 10 days. Half-life: not established. Available from COA-verified vendors with code PEPTIDEX for up to 20% off.
Sourcing data for Thymalin is updating.
We verify new listings weekly — check back soon.
Sourcing data for Thymalin is updating.
We verify new listings weekly — check back soon.
Polypeptide extract from animal thymus gland containing a mixture of thymic hormones including thymulin, thymosin, and thymopoietin. Restores thymic function, promotes T-cell differentiation and matur
⚠️ Educational only · Not medical advice · Consult a doctor · Most peptides are research-only / not FDA-approved for human use
COA-verified vendors · Use code PEPTIDEX for up to 20% off
Verified pricing for Thymalin is not yet available in our database. Browse all COA-verified vendors on our price comparison tool, or check individual vendor pages.
Compare All VendorsThymalin (also known as Thymus extract, TFX, Thymic factor X) is a prominently researched experimental compound classified strictly within the Thymic Peptide framework. Operating primarily through advanced pharmacological pathways, its core mechanism of action is as follows: it polypeptide extract from animal thymus gland containing a mixture of thymic hormones including thymulin, thymosin, and thymopoietin. Restores thymic function, promotes T-cell differentiation and maturation, and modulates the balance between Th1/Th2 responses. Khavinson bioregulatory peptide research documents anti-aging effects via neuroendocrine-immune system normalization. with an established metabolic degradation profile, In preclinical investigative trials and independent academic studies, researchers utilizing Thymalin have documented significant, quantifiable biological outcomes, primarily focusing on immune restoration, longevity, thymic function support, t-cell maturation. Typical research protocols investigate administering 10000 to 10000mcg via im pathways daily x 10 days. However, it is critically important to understand that while Thymalin demonstrates profound physiological potential in highly controlled laboratory settings, it remains classified strictly as a research chemical and has not been approved by the United States Food and Drug Administration (FDA) for human therapeutic, diagnostic, or dietary consumption. Independent chemical analysis via rigorous third-party Certificate of Analysis (COA) testing utilizing High-Performance Liquid Chromatography (HPLC) and Mass Spectrometry (MS) remains the industry gold standard for verifying its base elemental stability when reconstituted appropriately in sterile bacteriostatic water.
Polypeptide extract from animal thymus gland containing a mixture of thymic hormones including thymulin, thymosin, and thymopoietin. Restores thymic function, promotes T-cell differentiation and maturation, and modulates the balance between Th1/Th2 responses. Khavinson bioregulatory peptide research documents anti-aging effects via neuroendocrine-immune system normalization.
Morozov et al.: 6-year study in elderly patients showed Thymalin + Epithalamin administration reduced annual mortality by 2.0–2.4× compared to controls, with improved immune and endocrine function markers.
EmergingKhavinson et al.: Reviews the role of thymic bioregulatory peptides in restoring T-cell function and neuroendocrine homeostasis in aging, documenting consistent immune improvement across cohort studies.
EmergingBased primarily on Russian clinical cohort studies (Khavinson et al.). Limited Western RCT validation. Generally well tolerated in published research. Not FDA-approved. Research only. Caution: Russian bioregulatory research base has limited reproducibility in Western trials.
See our evidence grading methodology for how we evaluate and grade peptide safety data.
⚠️ For educational purposes only. Not medical advice. Consult a healthcare professional before using any peptide.
Khavinson protocol: 10mg IM daily for 10 days, repeated 1–2x per year. No validated Western dosing protocol.
Weeks 2–4
T-cell count normalization; improved immune markers in Russian cohort studies
Month 2–3
Sustained immune function improvement over 6-month follow-up
| Side Effect | Incidence | Severity |
|---|---|---|
Injection site reaction | ~5% | mild |
Finding verified, high-purity Thymalin requires rigorous COA verification. We independently evaluate vendors based on third-party HPLC testing, purity thresholds (≥98%), and batch-specific documentation.
View COA-Verified Thymalin✓ Third-party tested·✓ US shipping·✓ COA on every batch
Disclosure: PeptiDex may earn a commission from purchases made through affiliate links. This does not affect our editorial independence or recommendations. We exclusively feature vendors that pass our strict quality verification protocols.
⚠️ Educational only · Not medical advice · For research use only. Information on this page is compiled from peer-reviewed literature and is intended strictly for educational and informational purposes. Peptides discussed may be unapproved research chemicals — consult a licensed healthcare professional before considering any peptide compound. Read our full disclaimer
Affiliate disclosure: PeptiDex may earn commissions from purchases made through vendor links on this page. This does not affect our editorial ranking or vendor recommendations — we exclusively feature vendors that pass independent COA verification. See our methodology · Editorial policy
12 stacks • exact dosages • cycle lengths • printable reference
No spam. Unsubscribe anytime.
Independent researcher, not a medical professional
PeptiDex Research is the byline used by the independent researcher who builds and maintains PeptiDex. The site is a one-person research project — there is no editorial board, no medical reviewers, and no clinical staff. Content is produced by reading...
View profile