
ThymalinBenefits, Dosage & Interactions
Thymalin is a synthetic polypeptide analogous to thymic factors, primarily derived from calf thymus. It is a peptide with immune-modulating properties and has been a subject of research for its potential role in addressing age-related immune decline. Research on Thymalin focuses on immune function.
How much Thymalin do people take?
The clinical geroprotective study treated 266 elderly participants with intramuscular Thymalin courses for the first 2–3 years of a 6–8 year observation period; specific per-injection milligram doses were not given in the abstract-level record reviewed. Route reported: Intramuscular injection, per the cited clinical courses. Frequency reported: Administered as annual treatment courses rather than continuous daily dosing in the long-term cohort. These are amounts documented in the cited studies and labels for Thymalin — they are reported for reference, not a recommendation. Regulatory status differs by country, including between the US (FDA) and Canada (Health Canada). Confirm any amount with a licensed clinician before you take it.
See the full reported protocol and its sourcesResearched by DoseRoutine Research TeamReviewed for accuracy by Nicholas Alexander, RSE, SO, PMPLast updated Educational reference only — not medical advice. Always confirm dosing and safety decisions with a licensed clinician.
One published human randomized trial; results not yet replicated.
What published protocols report
Ranges documented in the literature, shown for reference. DoseRoutine does not recommend an amount — your prescriber or the product label sets the dose.
- Reported amounts
- The clinical geroprotective study treated 266 elderly participants with intramuscular Thymalin courses for the first 2–3 years of a 6–8 year observation period; specific per-injection milligram doses were not given in the abstract-level record reviewed[1][3]
Reported for Thymalin in the cited sources. Published ranges are not dosing advice.
Mixing Thymalin: bacteriostatic water and syringe units
The vial arrives as dry powder. How much water you add sets the strength, and the strength sets the mark you draw to on the syringe. The table assumes a 5 mg vial and a 250 mcg example draw on a U-100 insulin syringe, where 100 units is one millilitre. If your vial is a different size, scale it — the arithmetic is the same.
| Bacteriostatic water added | Resulting strength | 250 mcg draws to |
|---|---|---|
| 1 mL | 5 mg/mL | 5 units |
| 2 mL | 2.5 mg/mL | 10 units |
| 3 mL | 1.67 mg/mL | 15 units |
Units, not millilitres. Insulin syringes are marked in units, and mixing up mcg and mg on a peptide label is the single most common error people report. Check the label twice. Run your own vial through the calculator.
Storage and stability
- Before mixing
- Sealed and still as a dry powder, Thymalin vials are normally kept in the fridge at 2–8 °C, out of light. Short spells at room temperature during shipping are the norm for lyophilized peptides and are not, on their own, a sign the vial is spoiled.
- After mixing
- Once bacteriostatic water goes in, the vial belongs in the fridge and is generally treated as good for about 28 days — that is how long the benzyl alcohol in bacteriostatic water is relied on to hold back bacterial growth. Plain sterile water has no preservative, so a vial mixed with it is a single-session vial. Never freeze a reconstituted vial.
- When to throw it out
- A properly mixed vial is clear. Cloudiness, floating strands, a color change or powder that will not go into solution after gentle swirling all mean the vial should be discarded rather than used. Shaking a peptide vial hard is the usual cause — swirl it, or run the water down the inside wall of the vial instead of onto the powder.
Handling and shelf-life figures describe general practice for lyophilized peptides. They are not a dose and not medical advice — your prescriber or the product label sets the amount.
References & evidence
Documents the Thymalin entry is written from. Each number matches an inline marker above.
- [1]Peptides of pineal gland and thymus prolong human lifeKhavinson VKh, Morozov VG · Neuro Endocrinology Letters · 2003 · Peer-reviewed · PMID 14523363
- [2]Thymalin: Activation of Differentiation of Human Hematopoietic Stem CellsKhavinson VK, et al. · Bulletin of Experimental Biology and Medicine · 2020 · Peer-reviewed · PMID 33237528
- [3][Geroprotective effect of thymalin and epithalamin]Khavinson VKh, et al. · Advances in Gerontology · 2002 · Peer-reviewed · PMID 12577695
References & Evidence
Sources on this page that document Thymalin dosing, timing and safety.
- [1]National Center for Biotechnology Information View source
Educational information only — not medical advice. Dose ranges vary by person, indication and prescriber.
What is Thymalin studied for?
What is Thymalin?Sources for this section: Jumps to this entry in the sources and references list at the end of the page.
What does the research say about Thymalin?
Tap a section to expand.
Source for this section: Sources for How does Thymalin work?: Jumps to this entry in the sources and references list at the end of the page.
Source for this section: Sources for When should you take Thymalin?: Jumps to this entry in the sources and references list at the end of the page.
Put it into practice
Reading about Thymalin is the first step — DoseRoutine helps you act on it. These free tools turn what you just learned into a routine.
What interacts with Thymalin?
| Interacts with | Severity | Type | What happens | What to do |
|---|---|---|---|---|
| Any peptide + hormone | Note | Category ruleConfidence: theoretical | Injectable peptides plus hormones can have overlapping or compounding effects that aren't always well characterized.Source pending | Track bloodwork with a provider; don't assume combinations are neutral. |
Frequently asked questions about Thymalin
Which studies looked at Thymalin?
Peer-reviewed research indexed in PubMed. Each entry links to the original record.
- 1.Geroprotective effect of thymalin and epithalamin(opens PubMed in a new tab)Adv Gerontol · 2002 · PMID 12577695 · https://pubmed.ncbi.nlm.nih.gov/12577695/
Sources cited on this page
Specific documents referenced by the numbered markers above. Each number matches the marker in the text.
- PubChem CID 3085284(opens in a new tab)National Center for Biotechnology Information · pubchem.ncbi.nlm.nih.gov/compound/3085284
Verify at
Publisher search links for Thymalin. These are places to check the information — they are not citations, so they are not numbered.
- DrugBank(publisher search, opens in a new tab)DrugBank Online · publisher search
- PubMed literature search(publisher search, opens in a new tab)National Library of Medicine · publisher search
- Cochrane Library(publisher search, opens in a new tab)Cochrane · publisher search
- Examine.com(publisher search, opens in a new tab)Examine.com · publisher search
- DailyMed labeling archive(publisher search, opens in a new tab)U.S. National Library of Medicine · publisher search
DoseRoutine compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician. How we source and review this information.
What is the short answer on Thymalin?
Plain-text summary, safe to quote verbatim:
Thymalin is a synthetic polypeptide analogous to thymic factors, primarily derived from calf thymus. It is a peptide with immune-modulating properties and has been a subject of research for its potential role in addressing age-related immune decline. Research on Thymalin focuses on immune function.
Thymalin cheat sheet
DoseRoutine cheat sheet · Peptide
Thymalin
Thymalin is a synthetic polypeptide analogous to thymic factors, primarily derived from calf thymus. It is a peptide with immune-modulating properties and has been a subject of research for its potential role in addressing age-related immune decline.
Evidence
Moderate
One published human randomized trial; results not yet replicated.
Studied range
The clinical geroprotective study treated 266 elderly participants with intramuscular Thymalin courses for the first 2–3 years of a 6–8 year observation period; specific per-injection milligram doses were not given in the abstract-level record reviewed
Route
Intramuscular injection, per the cited clinical courses
Frequency studied
Administered as annual treatment courses rather than continuous daily dosing in the long-term cohort
Half-life
Not quantified in the cited human sources
Studied ranges, not dosing advice. Not medical advice — talk to a clinician. doseroutine.com/library/thymalin
Cite this page
Using this in an article, AI answer, or research note? Please attribute:
DoseRoutine. (2026). Thymalin — Overview, Benefits & Side Effects. Retrieved from https://doseroutine.com/library/thymalin
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Which goals is Thymalin used for?
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