Buy TRH Thyrotropin (Protirelin) 50mg for Endocrine Research with Discreet Worldwide Shipping
TRH Thyrotropin, also known as Protirelin, is a synthetic tripeptide widely used in endocrine and pituitary research. This high-purity peptide plays a central role in studying thyrotropin-releasing hormone (TRH) pathways and their influence on thyroid-stimulating hormone (TSH) regulation.
At Peptide Online Store, we supply research-grade TRH Thyrotropin (Protirelin) 50mg manufactured under GMP-compliant conditions with ≥99% purity, validated by HPLC and Mass Spectrometry testing. Our peptides are intended strictly for laboratory and scientific research use only—not for human consumption.
What is TRH Thyrotropin (Protirelin)?
TRH (Thyrotropin-Releasing Hormone), chemically known as L-pyroglutamyl-L-histidyl-L-proline amide, is a naturally occurring tripeptide produced in the hypothalamus.
It serves as a crucial regulatory hormone in the hypothalamic-pituitary-thyroid (HPT) axis, stimulating the release of thyroid-stimulating hormone (TSH) and prolactin from the anterior pituitary gland.
Protirelin, the synthetic analog of TRH, allows controlled research into thyroid regulation, neuroendocrine feedback, and receptor signaling mechanisms.
How Does TRH Thyrotropin (Protirelin) Work in the Body?
In biological systems, TRH binds to TRH receptors (TRHR) located primarily in the pituitary and central nervous system. Upon receptor binding, TRH activates the phospholipase C (PLC) pathway, leading to increased intracellular calcium and stimulating the secretion of TSH.
Research models have also used Protirelin to examine:
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Neuroendocrine control of thyroid and prolactin release
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Central nervous system signaling pathways
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Hypothalamic feedback mechanisms
These properties make TRH a valuable compound for investigating hormonal regulation and neuroendocrine interactions.
Key Benefits of TRH Thyrotropin (Protirelin) in Research
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Supports research on thyroid hormone regulation and TSH secretion
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Useful in neuroendocrine feedback loop studies
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Helps explore CNS neurotransmitter interactions
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Synthetic form ensures stability and reproducibility
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High purity allows accurate and repeatable laboratory results
(For laboratory and research use only. Not approved for human or veterinary use.)
Product Details and Purity
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Product Name: TRH Thyrotropin (Protirelin)
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CAS Number: 24305-27-9
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Molecular Formula: C16H22N6O4
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Molecular Weight: 362.38 g/mol
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Form: Lyophilized powder
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Purity: ≥99% (HPLC verified)
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Storage: −20°C (long-term), avoid repeated freeze-thaw cycles
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Appearance: White to off-white powder
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Solubility: Soluble in sterile water or appropriate buffer solution
Dosage & Usage Guidelines
For in vitro and in vivo laboratory applications only.
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Reconstitute using sterile bacteriostatic water or PBS buffer
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Mix gently to avoid foaming
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Store reconstituted solution at 2–8°C and use within several weeks
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Recommended concentration varies by research design and assay protocol
Disclaimer: Not for human consumption, medical, or veterinary use.
Safety, Side Effects & Precautions
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Handle in accordance with standard laboratory safety protocols
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Use gloves, lab coat, and protective eyewear
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Avoid inhalation, ingestion, or contact with skin
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Dispose of unused material per local regulations
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For research purposes only — not for diagnostic or therapeutic use
Quality Assurance & Testing
Every batch of TRH Thyrotropin (Protirelin) is subjected to:
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HPLC analysis for purity verification
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Mass spectrometry (MS) confirmation
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Peptide content testing and amino acid sequence verification
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Sterility and endotoxin testing
All results are documented in a Certificate of Analysis (COA) provided with each order.
Commitment to Quality and Compliance
Peptide Online Store partners exclusively with GMP-certified peptide manufacturers to ensure unmatched quality and purity.
All peptides comply with ISO 9001 and analytical laboratory standards.
Our operations emphasize ethical sourcing, batch traceability, and strict quality control for consistent research outcomes.
Potential Applications (For Research Use Only)
TRH Thyrotropin (Protirelin) is primarily studied in:
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Endocrine and thyroid regulation models
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Pituitary gland hormone studies
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Neurochemical and neurotransmitter research
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Receptor binding assays and molecular signaling investigations
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Pharmacological screening and peptide receptor mapping
Why Choose Peptide Online Store for TRH Thyrotropin (Protirelin)?
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Premium research-grade peptide quality
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≥99% purity, verified by COA and HPLC
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Secure, temperature-controlled packaging
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Discreet worldwide delivery
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Dedicated scientific support team
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Competitive pricing and trusted customer satisfaction
Shipping & Delivery Information
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Orders typically ship within 24–48 hours of confirmation
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Worldwide delivery available via trusted couriers
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Peptides shipped in temperature-stabilized, discreet packaging
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Tracking information provided for every order
How to Order Online
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Visit the product page for TRH Thyrotropin (Protirelin) 50mg
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Select your desired quantity and add to cart
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Proceed to secure checkout
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Choose from multiple payment options
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Receive confirmation and shipment tracking details
Our team ensures fast dispatch and full support throughout your order process.
Frequently Asked Questions (FAQ)
Q1: Is TRH Thyrotropin (Protirelin) legal to purchase?
Yes. It is legal to purchase for laboratory and scientific research purposes in most regions.
Q2: Do you provide a Certificate of Analysis (COA)?
Yes, each batch includes a COA verifying peptide identity and purity.
Q3: How should this peptide be stored?
Store lyophilized peptide at −20°C. Reconstituted peptide should be refrigerated (2–8°C).
Q4: What is the purity level of your peptides?
All peptides, including TRH Thyrotropin (Protirelin), are ≥99% pure by HPLC.
Related Products to TRH Thyrotropin (Protirelin)
Researchers also purchase:
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GHRH (Growth Hormone-Releasing Hormone)
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Somatostatin (Growth Hormone Inhibiting Peptide)
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GnRH (Gonadotropin-Releasing Hormone)
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CRH (Corticotropin-Releasing Hormone)
These peptides are frequently studied together for endocrine and neuroregulatory research.
Final Thoughts
TRH Thyrotropin (Protirelin) 50mg is a cornerstone compound in thyroid and neuroendocrine research. With its exceptional purity, stability, and reproducibility, it remains a reliable choice for scientists investigating pituitary-thyroid interactions and hypothalamic signaling.
Order today from Peptide Online Store—your trusted global source for premium research-grade peptides delivered safely and discreetly.

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