Thymulin
Also known as: Facteur Thymique Serique (FTS)
Thymulin is a zinc-dependent nonapeptide (pGlu-Ala-Lys-Ser-Gln-Gly-Gly-Ser-Asn) secreted by thymic epithelial cells, originally isolated by Bach and colleagues in the 1970s as 'facteur thymique sérique' (FTS). It is NOT the same compound as Thymalin (a Russian bovine thymus extract) or Thymosin alpha-1 (a separate 28-amino-acid thymic peptide). Thymulin is not FDA-approved; use is research/investigational only.
Who's worth your money for Thymulin
Every current seller, ranked by independent evidence — Merit Score, latest COA purity, and live $/mg (size-normalized). Prices refresh daily. Rankings are never paid.
Top Merit pick
Highest Merit Score (96) of 1 scored sellers
$64.97 · 10mg · 99.7% purity
Average price
$5.97/mg
Sellers
9
45-day trend
+3.2%
5 of 9 sellers have a current price· 1 stale hidden· 3 unverified hidden
- 🇺🇸 BioLongevity Labs96
✓ verified at source · 23h ago
$6.50/mg +8.8% vs avg$64.97
10mg
Prices observed from public storefronts (last 24h), normalized to $/mg. "Evidence" is Merit's 0–100 Merit Score, derived only from observable verification evidence (methodology on /about); "Purity" is the latest independent COA. Some buy links are affiliate links — Merit may earn a commission at no extra cost to you, and where a vendor offers one, the code shown gets you a discount at their checkout. Affiliate status never affects price data, ranking, or the Merit Score (full policy on /disclosure). Research use only.
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About Thymulin
CAS
78922-62-0
Molecular formula
C33H54N12O15
Sequence
pGlu-Ala-Lys-Ser-Gln-Gly-Gly-Ser-Asn
Typical dose range
10–20 mcg/day subcutaneous (research use); some protocols report 100–400 mcg 3×/week
Half-life
~10 minutes (free form in vivo)
COAs for Thymulin
7 third-party tests across 3 vendors. Each card links to the full report.
For
Thymulin
by Real Peptides· batch BATCH-0322
For
Thymulin
by BioLongevity Labs· batch 4-3-46031
For
Thymulin
by Skye Peptides· batch TYM25-10-001
For
Thymulin
by Verified Peptides· batch 66532A
For
Thymulin
by Verified Peptides· batch 66532A
Purity not on file
For
Thymulin
by Skye Peptides· batch TYM25-10-001
Purity not on file
For
Thymulin
by Skye Peptides· batch TYM25-10-001
13 citations indexed for Thymulin
Study · 2026
Thymulin restrains age-associated myeloid inflammation and enhances cancer immunotherapy
Chronic inflammation increases with age and contributes to cancer progression and therapeutic resistance, yet the mechanisms underlying this process remain incompletely understood.
review · 2026
Targeting Leukopoiesis: Pharmacological and Biotechnological Strategies for the Treatment of Leukopenia
Leukopenia remains a major clinical challenge associated with infectious diseases, oncological therapies, autoimmune disorders, and metabolic and iatrogenic conditions.
Study · 2026
ANP32E drives lung adenocarcinoma progression via GSK3β-mediated glycolytic reprogramming
Lung adenocarcinoma (LUAD), a leading cause of cancer mortality, involves incompletely understood epigenetic-metabolic crosstalk. We identified ANP32E as a key regulator through multi-omics (TCGA, scRNA-seq) and clinical analyses, finding its overexpression correlates with poor prognosis.
review · 2025
Maternal Thymus Adaptations and Hormone Regulation During Pregnancy
The thymus is necessary for the development of T lymphocytes and central tolerance, and adaptations in the maternal thymus are required during pregnancy. In the present paper, maternal thymic cellular anatomy, T-cell development in the thymus, and related progress are reviewed.
review · 2025
Zinc Fortification and Supplementation to Reduce Diarrhea in Children: A Literature Review
Background Zinc deficiency is a major global health issue and appears to be responsible for risk of diarrhea and death, particularly in children under 5 years. This review therefore aimed to summarize the existing literature related to zinc supplementation and fortification for the prevention of diarrhea.
animal · 2024