⚠ FOR LABORATORY RESEARCH USE ONLY · NOT FOR HUMAN CONSUMPTION · QUALIFIED RESEARCHERS 21+
// PB-0032 Peptide Growth Hormone

Tesamorelin

Stabilized GHRH · FDA approved.

Tesamorelin is a synthetic GHRH analog stabilized against DPP-4 cleavage by an N-terminal hexenoyl modification. It is FDA-approved (as Egrifta) for the treatment of HIV-associated lipodystrophy — one of the few GH-related peptides with a specific approved indication. Supplied as research-grade material with 3rd-party HPLC verification and full Certificate of Analysis per lot.

01

Compound profile.

// CHEMICAL & STRUCTURAL SPEC — TESAMORELIN
MOLECULAR FORMULA
C221H366N72O67S
Peptide · growth hormone class.
MOLECULAR WEIGHT
5,135.9 Da
Monoisotopic / reported mass.
CHAIN LENGTH
44 aa
Primary structure residues.
ORIGIN
Synthetic GHRH analog
Source or discovery context.
STUDIED PATHWAYS
GHRHR
Reported in published literature.
REPORTED HALF-LIFE
~25–40 min
Moderately short t½.
HPLC PURITY
99.8%
Minimum release spec · typical >99.9%.
APPEARANCE
White lyo.
White to off-white lyophilized form.
// PRIMARY STRUCTURE
trans-3-hexenoyl-Tyr–Ala–Asp–Ala–Ile–Phe–Thr–Asn–Ser–Tyr–Arg–Lys–Val–Leu–Gly–Gln–Leu–Ser–Ala–Arg–Lys–Leu–Leu–Gln–Asp–Ile–Met–Ser–Arg–Gln–Gln–Gly–Glu–Ser–Asn–Gln–Glu–Arg–Gly–Ala–Arg–Ala–Arg–Leu-NH₂

// Full 44-residue GHRH sequence with a trans-3-hexenoyl modification at the N-terminus. The hexenoyl group is the key stabilization — it blocks DPP-4 cleavage at Tyr-Ala, the primary degradation site of native GHRH.
02

What the literature reports.

Tesamorelin is a synthetic GHRH analog stabilized against DPP-4 cleavage by an N-terminal hexenoyl modification. It is FDA-approved (as Egrifta) for the treatment of HIV-associated lipodystrophy — one of the few GH-related peptides with a specific approved indication.

Reported mechanism

Binds the GHRH receptor to stimulate endogenous pulsatile GH release. The N-terminal trans-3-hexenoyl modification blocks DPP-4 mediated cleavage between Tyr¹ and Ala², extending plasma half-life roughly 10-fold compared to native GHRH.

Regulatory status

FDA-approved as Egrifta (Theratechnologies, 2010) for the reduction of excess abdominal fat in HIV-infected patients with lipodystrophy. Listed in the WADA prohibited list.

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.tesamorelin.TES-26-Q1-0021.log
// lot release record
compound Tesamorelin (C221H366N72O67S)
lot.id TES-26-Q1-0021
class peptide
mw.theoretical 5,135.9 Da
mw.observed 5,135.9 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?+

Tesamorelin is a 44-residue peptide with molecular formula C221H366N72O67S and molecular weight of approximately 5,135.9 Da.

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?+

FDA-approved as Egrifta (Theratechnologies, 2010) for the reduction of excess abdominal fat in HIV-infected patients with lipodystrophy. Listed in the WADA prohibited list.

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.