HGH Fragment 176-191 Peptide Vial

HGH Fragment 176-191 is a synthetic 16-amino acid segment derived from the C-terminal region of human growth hormone, supplied as a lyophilized powder at ≥98% purity in a sterile glass vial. Available from Direct Anti Peptide, this research-grade compound is produced under rigorous quality control protocols to support advanced laboratory investigation. For research use only. Not for human or veterinary use. Not for clinical, diagnostic, or consumptive applications.

Product Overview

HGH Fragment 176-191 — commonly referred to as HGH Frag 176-191 — is a truncated analogue of human growth hormone encompassing amino acid positions 176 through 191 of the full-length GH sequence. This isolated C-terminal fragment has attracted significant scientific interest due to its distinct biochemical profile relative to the intact GH molecule. Researchers studying metabolic pathways, adipose tissue regulation, and body composition dynamics have identified this peptide as a compelling subject of inquiry. Direct Anti Peptide offers this compound at ≥98% purity, making it suitable for demanding in vitro and preclinical research applications.

Peptide Structure & Amino Acid Sequence

HGH Fragment 176-191 is a 16-residue peptide chain corresponding to the hinge region of the human growth hormone molecule. Its linear sequence spans positions 176–191 and retains the structural motifs associated with the lipolytic activity attributed to native GH. The fragment is synthesized without the receptor-binding domains present in full-length HGH, producing a molecule with a distinct and more targeted biochemical interaction profile. This structural specificity makes it a valuable tool for mechanistic research into GH-related signaling.

Chemical & Physical Characteristics

• Peptide Name: HGH Fragment 176-191
• Residue Count: 16 amino acids
• Origin: Synthetic analogue of human growth hormone C-terminal region
• Molecular Form: Lyophilized (freeze-dried) powder
• Appearance: White to off-white lyophilized solid
• Purity: ≥98% (HPLC verified)
• Solubility: Soluble in aqueous buffer systems (for laboratory use only)
• Storage Temperature: −20°C (long-term); 2–8°C (short-term)

Purity & Analytical Verification (HPLC & MS)

Every batch of HGH Fragment 176-191 supplied by Direct Anti Peptide undergoes stringent analytical testing prior to release. High-Performance Liquid Chromatography (HPLC) is employed to confirm purity at ≥98%, while Mass Spectrometry (MS) validates the molecular weight and confirms correct peptide identity. These dual-verification methods ensure that each vial meets the exacting standards required for reliable, reproducible scientific research. Certificate of Analysis documentation is available upon request to support laboratory compliance and data integrity.

Quality Control & Lyophilization Integrity

Lyophilization — the freeze-drying process used to prepare this peptide — is a critical step in preserving structural integrity and extending shelf life. By removing moisture under vacuum at low temperatures, lyophilization minimizes degradation pathways and maintains the peptide in a stable, biologically inert state until reconstitution is required in a laboratory setting. Each sterile glass vial is sealed under controlled conditions to prevent contamination, oxidation, and moisture ingress, ensuring the compound arrives in optimal condition for research use.

Safety, Handling & Laboratory Precautions

HGH Fragment 176-191 is a research compound intended exclusively for use by trained laboratory professionals in controlled scientific environments. Appropriate personal protective equipment (PPE) — including gloves, eye protection, and lab coats — should be worn at all times when handling this material. Standard laboratory biosafety protocols must be observed. This peptide must not be administered to humans or animals under any circumstances. Disposal must comply with applicable local, national, and institutional regulations governing research chemicals.

Reconstitution, Packaging & Storage

HGH Fragment 176-191 is supplied in a sterile, sealed glass vial as a lyophilized powder. Reconstitution for laboratory assay purposes should be performed using appropriate research-grade solvents in accordance with established in vitro protocols. Once reconstituted, the solution should be stored at 2–8°C and used within a timeframe consistent with standard peptide stability guidelines. Unopened lyophilized vials should be stored at −20°C away from light, heat, and humidity to maximize shelf life and maintain purity integrity.

Intended Research Use & Market Positioning

HGH Fragment 176-191 is positioned as a premium research peptide for scientists and institutions investigating growth hormone biology, metabolic regulation, adipose tissue function, and related endocrine mechanisms. It is not intended for use as a pharmaceutical, nutraceutical, food supplement, or veterinary product. Direct Anti Peptide supplies this compound strictly to qualified research professionals and licensed institutions operating within appropriate regulatory frameworks.

Ordering, Availability & Fulfillment

Direct Anti Peptide makes it straightforward to buy HGH Fragment 176-191 online with confidence. This peptide vial is available for sale in multiple quantities to suit varying research requirements, with bulk purchasing options offering additional value. Orders are processed promptly, with careful packaging to ensure cold-chain integrity during transit. Our fulfillment process is designed to deliver your research compounds in optimal condition, on time, at the best price available for verified ≥98% purity material.

Legal & Regulatory Disclaimer

For research use only. Not for human or veterinary use. Not for clinical, diagnostic, or consumptive applications. HGH Fragment 176-191 is sold exclusively as a laboratory research reagent. Direct Anti Peptide makes no claims regarding therapeutic efficacy, safety for consumption, or suitability for any application outside of controlled scientific research. Purchasers are solely responsible for ensuring compliance with all applicable local, national, and international laws and regulations governing the procurement, handling, and use of research peptides. This product must not be misused, resold for consumptive purposes, or applied outside of a licensed research context.