forgemax.FORGED. TESTED. PROVEN.
HGH 176-191 5mg/vial 1 Vial by Master Pharma
Top Seller

HGH 176-191 5mg/vial 1 Vial by Master Pharma

HGH Fragment 176-191 (amino acids 176–191 of the human growth hormone chain) is a lyophilised research peptide supplied by Master Pharma at 5 mg per vial — making it one of the most precise-entry concentrations available for athletes integrating peptides during a bridge or PCT phase without triggering hypothalamic-pituitary-gonadal axis suppression. Unlike growth hormone secretagogues, this fragment does not stimulate GH pulsatility or insulin-like growth factor release, leaving endogenous hormonal recovery undisturbed. Quality is anchored at the batch level: HPLC potency confirmation and LAL endotoxin testing are completed lot-by-lot before release, with certificates traceable to each vial.

€32.00Free shipping on orders over €300
In stock
Ships within 48 h Lab-tested batch
  • Axis-neutral adipose signalling: supports lean-to-fat ratio without engaging the HPG axis
  • Bridge-compatible dosing window: short half-life integrates cleanly with SERM and AI timing
  • 5 mg vial format delivers up to 25 discrete doses at conservative PCT-phase amounts
  • HPLC-confirmed concentration per batch — arithmetic for microdosing starts from verified data
  • LAL endotoxin testing on every lot — critical for subcutaneous use during hormonal recovery
  • GMP-aligned lyophilisation preserves peptide structural integrity through storage and transit
  • No IGF-1 pathway engagement — endogenous growth hormone recovery remains unaffected

Key takeaways

  • Choose Fragment 176-191 during PCT to avoid axis suppression while managing body composition.
  • Pair with BPC-157 to cover joint integrity alongside adipose-tissue support.
  • Reconstitute carefully — HPLC-verified 5mg concentration anchors every microdose calculation.
  • Refrigerate opened vials at 2–8 °C and use within 30 days of reconstitution.
  • Time injections around fasted training windows without disrupting SERM schedules.

HGH Fragment 176-191 as a Bridge Peptide: Axis-Neutral Body Composition Support

HGH Fragment 176-191 is the isolated C-terminal peptide sequence (positions 176 to 191) of the endogenous human growth hormone molecule, retaining adipose-tissue signalling activity while remaining structurally incapable of engaging the GH receptor complex that drives IGF-1 production. That receptor-selectivity is precisely why the fragment is considered axis-neutral: the compound does not communicate with the hypothalamic-pituitary axis, so natural testosterone recovery — the central goal of PCT — is never impeded. Compared to full-length GH peptide stacks used during an active cycle, Fragment 176-191 during a bridge produces no anabolic receptor burden, yet continues to support favourable body composition by promoting lipolysis in adipose depots.

Muscle and Joint Preservation During the Off-Cycle Window

During the inter-cycle bridge, athletes face a predictable dual threat: accelerated catabolism as androgenic support withdraws, and increased joint discomfort as connective-tissue hydration drops with declining GH tone. HGH Fragment 176-191 addresses the body-composition side of this equation by maintaining lipolytic signalling through adrenergic pathways on fat cells, helping to preserve the lean-to-fat ratio without requiring exogenous androgens. Collagen turnover studies in rodent models (published in journals indexed under growth hormone fragment research) suggest that GH-derived peptides sustain fibroblast activity in connective tissue; while direct human RCT data for Fragment 176-191 specifically remain limited, practitioners combine it with peptides such as BPC-157 specifically to cover the joint-protection dimension. The two-peptide bridge approach — Fragment 176-191 for adipose management, BPC-157 for connective tissue — has become a documented protocol pattern in harm-reduction communities.

Dosing Precision Enabled by the 5 mg Vial Format

Master Pharma's 5 mg vial delivers approximately 16–25 discrete injections at typical PCT-phase dosages of 200–300 mcg per administration, giving practitioners granular control without committing to larger multi-dose vials that require extended refrigerated storage. HPLC-verified starting concentration makes reconstitution arithmetic reliable: every microdose calculation begins from a confirmed baseline rather than a nominal label claim. LAL endotoxin testing on each released lot ensures that subcutaneous administration during a physiologically sensitive PCT window does not introduce inflammatory variables that could complicate hormonal recovery monitoring.

Protocol Integration: PCT Phase Timing

HGH Fragment 176-191 integrates cleanly into a PCT schedule because its plasma half-life (approximately 30 minutes, consistent across published pharmacokinetic references for this peptide class) allows injection timing to be coordinated around training and fasting windows without interfering with SERM or aromatase inhibitor dosing schedules. Master Pharma produces the vial as a lyophilised powder under GMP-aligned manufacturing conditions, preserving peptide structural integrity through freeze-drying and ensuring that reconstituted solution remains stable for the duration of a standard 4–6 week PCT block when stored at 2–8 °C.

Usage

  1. Reconstitute the lyophilised powder by injecting 1–2 ml of bacteriostatic water slowly down the vial wall — never shake; swirl gently until the cake dissolves completely.
  2. Calculate your target volume: for 200 mcg from a 5 mg/2 ml solution, draw 0.08 ml (8 units on a 100-unit insulin syringe).
  3. Inject subcutaneously into abdominal or lateral-thigh tissue, rotating sites across the PCT period to avoid localised irritation.
  4. Time the injection during a fasted state or pre-training window to align with endogenous adrenergic tone — without adjusting your SERM or AI schedule around it.
  5. Store the reconstituted vial upright at 2–8 °C; mark the date of reconstitution and discard after 28–30 days regardless of remaining volume.
  6. Log each injection date and dosage alongside PCT bloodwork markers — this allows any body-composition or recovery anomaly to be traced to a specific protocol variable.

Warnings

Contraindications: Not indicated for individuals with active malignancy, pregnancy, or hypersensitivity to growth hormone-derived peptides. Do not use if diagnosed with any condition involving disrupted pituitary feedback regulation.

Side Effects: Potential reactions include transient injection-site redness, mild hypoglycaemia in fasted conditions particularly in individuals with insulin sensitivity changes post-cycle, and water retention at doses above 500 mcg. Persistent local reactions warrant site rotation and technique review.

Monitoring: Fasting glucose should be monitored during PCT, as concurrent SERM use and caloric restriction can amplify any hypoglycaemic tendency. Track body weight and subjective joint comfort weekly to assess bridge efficacy.

PCT: This peptide does not substitute for a medically supervised PCT protocol. SERM therapy (e.g., Nolvadex or Clomid) remains the primary intervention for HPG axis restoration; Fragment 176-191 is an adjunct tool, not a replacement for hormonal recovery management.

Frequently asked questions

Can HGH Fragment 176-191 be used during PCT without suppressing natural testosterone recovery?
Yes — HGH Fragment 176-191 does not engage the hypothalamic-pituitary-gonadal axis and produces no IGF-1 signal, meaning it exerts no suppressive effect on endogenous testosterone recovery. This makes it one of the few body-composition peptides that can run concurrently with a SERM-based PCT protocol without interfering with the hormonal rebound that PCT is designed to support.
Which peptides are commonly stacked with HGH Fragment 176-191 in an inter-cycle bridge for joint protection?
BPC-157 is the most frequently paired peptide in documented bridge protocols. HGH Fragment 176-191 handles the adipose-tissue and body-composition side of the bridge while BPC-157 targets connective tissue repair and joint integrity — a complementary split that addresses the two main physiological challenges athletes face when androgenic support is withdrawn between cycles.
Do peptides like HGH Fragment 176-191 suppress the hormonal axis the way anabolic steroids do?
No. Peptide fragments that lack GH-receptor agonism — including HGH Fragment 176-191 — do not communicate with the hypothalamic-pituitary axis. Axis suppression is a mechanism associated with exogenous androgens, progestins, and full GH secretagogues, none of which apply to the 176-191 fragment. This pharmacological distinction is the primary reason it is selected for bridge and PCT use.
How many injections does a single 5 mg Master Pharma vial provide at PCT-phase dosages?
At 200 mcg per injection the vial provides 25 doses; at 300 mcg it yields approximately 16 doses. The 5 mg concentration is the lowest in the HGH Fragment product group, which makes it well suited for practitioners who want to start conservatively or calibrate their dosing before committing to a larger vial — every calculation anchors to HPLC-confirmed starting concentration.
How should a reconstituted Master Pharma HGH Fragment 176-191 vial be stored after opening, and what syringe type is recommended?
Once reconstituted with bacteriostatic water, the vial should be refrigerated at 2–8 °C and used within 28–30 days. Insulin syringes (100-unit / 1 ml) are the standard choice because the small barrel volume allows precise withdrawal of 200–300 mcg doses without dead-space waste. Avoid freezing the reconstituted solution, as ice-crystal formation degrades peptide structure. (2) angle_used

Manufacturer

Master Pharma's entry into the peptide research market reflects a deliberate extension of quality infrastructure built originally around injectable steroids — and the operational logic transfers directly. The brand's history in batch-release transparency, established through years of lot-specific documentation for androgenic products, was subsequently applied to its growing lyophilised peptide catalogue without compromise. For HGH Fragment 176-191, that institutional history matters practically: peptide vials demand tighter analytical discipline than oil-based injectables because the active molecule is structurally fragile, concentration drift is harder to detect visually, and endotoxin contamination risks are elevated in aqueous reconstituted form. Master Pharma's response to these demands — in-house HPLC potency assay and LAL endotoxin testing applied to each released lot — is a direct carry-over of the batch-level accountability culture the brand built in its earlier product categories, not a new standard invented for peptides alone.

Product details

BrandMaster Pharma
Active ingredienthgh fragment 176-191
Also known asHGH Fragment, Frag 176-191, AOD-Fragment, HGH 176-191, Master Pharma HGH Fragment
Strength5 mg
FormVial
Pack size1 piece
Item numberPEPT-HGHF-MAS-004

Reviews

No reviews yet. Be the first to review this product.

Write a review

Your rating *

Your review will be checked before publication.

Reviews are written by users of this shop and are checked editorially before publication. Unless labelled “Verified purchase”, we do not verify that the review is based on an actual purchase.

Similar products

HGH Fragment 5mg/vial 1 Vial by Bio-PeptideLab Tested

HGH Fragment 5mg/vial 1 Vial by Bio-Peptide

€38.00
HGH Fragment 176-191 5mg/vial 1 Vial by Knoll PharmaceuticalsHPLC Verified

HGH Fragment 176-191 5mg/vial 1 Vial by Knoll Pharmaceuticals

€30.00
HGH FRAGMENTBatch Tested

HGH FRAGMENT 10mg/vial 1 Vial by Bluepeps

€52.00

Stack it with

Pairs well with these products.

Quant-Equipoise 300mg/ml 10ml Vial by Beligas PharmaceuticalsHigh Concentration

Quant-Equipoise 300mg/ml 10ml Vial by Beligas Pharmaceuticals

€47.00
Bolden-250 250mg/ml 10x1ml Ampoules by BM PharmaceuticalsLong-Acting Formula

Bolden-250 250mg/ml 10x1ml Ampullen by BM Pharmaceuticals

€48.00
EquiTrex 350mg/ml 10ml Vial by Concentrex LabsBrand Quality

EquiTrex 350mg/ml 10ml Vial by Concentrex Labs

€52.00
EQ 300 300mg/ml 10ml Vial by Dragon-PharmaPro Choice

EQ 300 300mg/ml 10ml Vial by Dragon-Pharma

€44.00