⚠ FOR LABORATORY RESEARCH USE ONLY · NOT FOR HUMAN CONSUMPTION · QUALIFIED RESEARCHERS 21+
// PB-0033 Mixture Immune / Longevity

Thymalin

Thymus polypeptide complex.

Thymalin is a polypeptide extract from bovine thymus developed in the USSR in the 1970s. It belongs to the same Russian peptide-bioregulator research tradition as Khavinson's later work, predating the synthetic short-peptide era. Supplied as research-grade material with 3rd-party HPLC verification and full Certificate of Analysis per lot.

01

Compound profile.

// CHEMICAL & STRUCTURAL SPEC — THYMALIN
MOLECULAR FORMULA
Polypeptide complex
Mixture · immune / longevity class.
MOLECULAR WEIGHT
10,000 Da
Monoisotopic / reported mass.
CLASS
Mixture
Compound classification.
ORIGIN
Bovine thymus extract
Source or discovery context.
STUDIED PATHWAYS
T-cell maturation
Reported in published literature.
REPORTED HALF-LIFE
Variable
Extract; PK varies.
HPLC PURITY
99.8%
Minimum release spec · typical >99.9%.
APPEARANCE
White lyo.
White to off-white lyophilized form.
// PRIMARY STRUCTURE
Purified polypeptide fraction from bovine thymus tissue (molecular weight ~1–10 kDa components)

// Not a single peptide — Thymalin is a purified polypeptide fraction isolated from the thymus gland of young cattle. The preparation contains a mixture of short peptides believed to correspond to the thymic hormones thymulin, thymopoietin fragments, and related bioactive species.
02

What the literature reports.

Thymalin is a polypeptide extract from bovine thymus developed in the USSR in the 1970s. It belongs to the same Russian peptide-bioregulator research tradition as Khavinson's later work, predating the synthetic short-peptide era.

Reported mechanism

The preparation is described in the literature as modulating T-cell maturation and differentiation. Reported effects include restoration of T-cell populations in thymectomized or immunodeficient animal models and modulation of cytokine profiles in inflammation studies.

Research context

Used clinically in Russia and some Eastern European countries for immune modulation. Not FDA-approved. The extract nature of the preparation means lot-to-lot composition variation is an inherent consideration.

The above summarizes published research literature. This is not medical advice, a protocol, or a recommendation for use. This compound is supplied for laboratory research only.

03

Storage & release.

SHIP TEMP
Ambient
Lyophilized; stable at room temp in transit.
UNOPENED
Refrigerate
Lyophilized, protected from light.
RECONSTITUTED
~28 days
At 2–8°C; never freeze solutions.
RELEASE DOC
COA · per lot
3rd-party analytical · attached at ship.
lab@peptidebros:~$ cat release.thymalin.TML-26-Q2-0012.log
// lot release record
compound Thymalin (Complex)
lot.id TML-26-Q2-0012
class mixture
mw.theoretical 10,000 Da
mw.observed 10,000 Da  [PASS]
purity.hplc 99.91%  [> 99.5% spec]
endotoxin < 0.125 EU/mL  [PASS]
sterility no growth  [PASS]
release.status RELEASED
04

Common questions.

What's the molecular profile?+

Thymalin is a complex mixture, not a single defined compound.

The full structural data and release specifications are in the Compound Profile section above. Every lot ships with an independently verified Certificate of Analysis.

How is purity verified?+

Each lot is independently verified by a 3rd-party analytical laboratory (STERIS Labs, Alcami Analytical, or equivalent) before release. Release specification is HPLC purity ≥ 99.5% (typical > 99.8%), mass spectrometry identity match within ±0.5 Da, water content < 5.0% Karl Fischer, and endotoxin < 0.25 EU/mL by LAL (USP <85>).

Look up the full COA for your lot at coa-lookup.html.

How is the compound shipped and stored?+

All compounds ship at ambient temperature in discreet, tamper-evident packaging. Lyophilized peptide powder is stable at room temperature for typical transit windows, which is why research-grade vendors ship this way. Tracked; signature not required.

Store unopened lyophilized product at 2–8°C protected from light. Once reconstituted, most peptides are stable at 2–8°C for approximately 28 days (compound-dependent).

Is this compound FDA-approved?+

Used clinically in Russia and some Eastern European countries for immune modulation. Not FDA-approved. The extract nature of the preparation means lot-to-lot composition variation is an inherent consideration.

All PeptideBros compounds are sold strictly as chemical reference materials for in-vitro laboratory research. They are not for human consumption.

Every lot,
on paper.

HPLC-verified. Mass-spec confirmed. Ambient-stable transit. The paperwork other vendors hope you never ask for.