forgemax.FORGED. TESTED. PROVEN.
IGF-1 LR3 1mg/vial 1 Vial by Bio-Peptide
Lab Tested

IGF-1 LR3 1mg/vial 1 Vial by Bio-Peptide

5 (2 reviews)

Bio-Peptide IGF-1 LR3 delivers a long-acting, arginine-substituted insulin-like growth factor-1 analogue as 1 mg of lyophilised peptide per vial, formulated to stimulate myofiber proliferation and channel caloric substrate toward skeletal muscle rather than adipose tissue. Its resistance to IGF binding proteins extends circulating half-life to approximately 20–30 hours—roughly 60× that of native IGF-1—enabling sustained receptor engagement throughout the post-training anabolic window. Independent batch release combines HPLC sequence confirmation with a LAL endotoxin screen, and the resulting certificates are tied to unique lot identifiers for full traceability.

€36.00Free shipping on orders over €300
In stock
Ships within 48 h Lab-tested batch
  • Promotes genuine muscle cell hyperplasia through satellite cell proliferation via PI3K/Akt/mTOR pathway activation
  • Sustains IGF-1 receptor occupancy for 20–30 hours due to IGFBP-binding resistance conferred by the arginine-3 substitution
  • Upregulates GLUT-4 transporter density in skeletal muscle, redirecting glucose away from adipose tissue
  • Supports lean-mass accrual during moderate caloric surplus through superior substrate partitioning
  • Supplied as a stable 1 mg lyophilised peptide per vial, preserving potency until reconstitution
  • Each batch independently certified for sequence identity (HPLC) and endotoxin safety (LAL test)

Key takeaways

  • Target muscle hyperplasia—not just hypertrophy—using IGF-1 LR3.
  • Exploit 20–30 h half-life for sustained anabolic receptor activation.
  • Inject immediately post-training to maximise GLUT-4-driven nutrient partitioning.
  • Verify every batch via independent HPLC and LAL certificates from Bio-Peptide.
  • Reconstitute with bacteriostatic water and refrigerate; use within 30 days.

IGF-1 LR3 as a Driver of Muscle Hyperplasia

IGF-1 LR3 is a synthetic 83-amino-acid growth factor analogue whose arginine-3 substitution and 13-residue N-terminal extension prevent binding to IGF binding proteins (IGFBPs), enabling systemic receptor activation that promotes true muscle cell hyperplasia—the formation of new myofibers—rather than the simple volumisation associated with glycogen or water loading. This mechanism distinguishes LR3 from unmodified IGF-1, which is sequestered by circulating IGFBPs within minutes of secretion, limiting its anabolic reach. Hyperplasia represents a structural expansion of muscle architecture that is, by definition, permanent once established, making LR3-driven adaptation qualitatively different from hypertrophy alone.

Research on IGF-1 receptor signalling confirms that LR3 activates the PI3K/Akt/mTOR pathway in satellite cells, stimulating their proliferation and differentiation into mature myofibers (measured via Akt phosphorylation assays in cell-culture studies). Compared to short-acting native IGF-1 with a plasma half-life of fewer than 20 minutes, IGF-1 LR3 sustains receptor occupancy for 20–30 hours, as documented in pharmacokinetic analyses using radiolabelled peptide tracers. Bio-Peptide verifies the amino-acid sequence and purity of each batch by independent HPLC, with the resulting certificate of analysis tied to a unique batch identifier.

Nutrient Partitioning: Directing Calories to Lean Tissue

IGF-1 LR3 functions as a potent nutrient-partitioning agent by upregulating GLUT-4 transporter expression in skeletal muscle, increasing insulin-independent glucose uptake into myocytes and effectively redirecting caloric substrate away from adipose storage. Studies measuring GLUT-4 protein density in rodent skeletal muscle report increases of up to 40 % following sustained IGF-1 receptor stimulation. This substrate redirection means that IGF-1 LR3 can support lean-mass accrual even during moderate caloric surplus, because a greater proportion of ingested carbohydrate enters muscle rather than fat cells.

The partitioning effect is amplified post-workout, when muscle membranes show the highest GLUT-4 translocation in response to IGF-1 receptor signalling. For this reason, immediate post-training injection timing is the protocol most consistent with the literature on IGF-1-mediated glucose disposal in exercised muscle. Researchers also note that the nutrient-partitioning effect complements exogenous insulin protocols, though the two agents must be managed independently to avoid compounded hypoglycaemic risk.

Quality Assurance and Batch Transparency

Every vial of Bio-Peptide IGF-1 LR3 undergoes HPLC sequence confirmation and LAL (Limulus Amebocyte Lysate) endotoxin testing performed by an independent third-party laboratory; both certificates are batch-specific and available for verification. The 1 mg lyophilised format maintains peptide integrity under refrigerated storage (2–8 °C) until reconstitution, after which bacteriostatic water extends usable life to approximately 30 days when kept refrigerated and shielded from light.

Usage

  1. Reconstitution: inject 1–2 mL of bacteriostatic water slowly along the inner vial wall; swirl gently—never vortex—to dissolve the lyophilised powder completely.
  2. Dose calculation: with 1 mL of bacteriostatic water added to 1 mg (1000 mcg), each 0.1 mL drawn in an insulin syringe equals 100 mcg; adjust draw volume to your target dose.
  3. Injection timing: administer immediately post-resistance training (within 15–30 minutes) to capitalise on peak GLUT-4 translocation in exercised muscle.
  4. Injection site: for hyperplasia-specific protocols, inject intramuscularly into the trained muscle group; subcutaneous injection may be used for systemic nutrient-partitioning effects.
  5. Blood glucose monitoring: check capillary glucose 30–60 minutes post-injection, particularly when combining IGF-1 LR3 with high-carbohydrate meals or insulin protocols, to detect excessive glucose disposal.
  6. Storage: refrigerate the reconstituted vial at 2–8 °C, protect from light, and discard any unused solution after 30 days to ensure peptide integrity.

Warnings

Contraindications: Do not use if you have a confirmed or suspected active malignancy, pre-diabetic fasting glucose irregularities requiring medical management, known hypersensitivity to IGF-1 analogues, or any proliferative retinopathy. Not intended for use by individuals under 18, during pregnancy, or while breastfeeding.

Side Effects: Hypoglycaemia is the principal acute risk—particularly in the 30–90 minutes post-injection window—and requires glucose monitoring. Jaw, hand, and joint discomfort (attributed to fluid shifts in connective tissue) may arise at doses above 80 mcg. Prolonged use has been associated with theoretical risks of tissue overgrowth; cycles should not exceed six weeks without a recovery interval.

Monitoring: Track fasting and post-injection blood glucose at baseline and throughout the cycle. Monitor for signs of acromegalic side effects (joint swelling, carpal tunnel symptoms) if dose escalation is applied. Periodic lipid panel assessment is advisable for extended protocols.

PCT: IGF-1 LR3 does not suppress the hypothalamic–pituitary–gonadal axis; dedicated sex-hormone PCT is therefore not required for LR3 use in isolation. If stacked with anabolic steroids or peptides that modulate GH/IGF-1 axis feedback, standard PCT for those agents should proceed as planned. A four-week off-cycle following LR3 use is recommended to allow IGF-1 receptor sensitivity to normalise.

Frequently asked questions

What makes IGF-1 LR3 more effective than naturally secreted IGF-1 for promoting muscle hyperplasia?
IGF-1 LR3 carries an arginine-3 substitution and an extended N-terminus that prevent it from binding to IGF binding proteins (IGFBPs), which normally sequester endogenous IGF-1 within minutes. The result is a plasma half-life of 20–30 hours versus fewer than 20 minutes for native IGF-1, allowing prolonged IGF-1 receptor activation in satellite cells and a measurably greater stimulus for myofiber proliferation—the biological basis of hyperplasia.
What exactly is muscle cell hyperplasia and why does it matter for long-term physique development?
Muscle hyperplasia is the actual increase in the number of muscle fibers, as opposed to hypertrophy, which is simply the enlargement of existing fibers. Because hyperplasia produces new myofibers—driven by satellite cell activation via the PI3K/Akt pathway—the structural gains are considered permanent architectural changes. This theoretically creates a higher ceiling for future hypertrophic growth, making hyperplasia a qualitatively distinct and longer-lasting adaptation than volumisation alone.
How does IGF-1 LR3 redirect nutrients toward lean muscle rather than fat storage?
IGF-1 LR3 upregulates GLUT-4 transporter expression in skeletal muscle, increasing insulin-independent glucose uptake into myocytes. Research using GLUT-4 protein-density assays in exercised rodent muscle has reported increases of up to 40 % with sustained IGF-1 receptor stimulation. This means dietary carbohydrates are preferentially shuttled into muscle tissue rather than adipose cells—a nutrient-partitioning effect that supports lean-mass gain even in a modest caloric surplus.
How should IGF-1 LR3 1mg vials be reconstituted and stored after opening?
Add 1–2 mL of bacteriostatic water slowly along the vial wall to dissolve the lyophilised powder without agitation. Once reconstituted, store the vial refrigerated at 2–8 °C, away from direct light, and use within 30 days. Never freeze the reconstituted solution, as ice-crystal formation degrades peptide integrity. Draw doses with an insulin syringe (29–31 gauge) to minimise peptide loss in dead space.
When is the optimal time to inject IGF-1 LR3 to maximise its nutrient-partitioning effect?
Immediately post-training is the window most supported by IGF-1 receptor signalling literature: exercised muscle membranes show peak GLUT-4 translocation in response to IGF-1 receptor activation, maximising glucose uptake into myocytes rather than adipocytes. Injecting within 15–30 minutes of finishing resistance training leverages this synergistic GLUT-4 upregulation, directing the caloric substrate available from a post-workout meal toward lean-tissue accrual. (2) angle_used

Manufacturer

Bio-Peptide's reputation among European research-peptide suppliers was built around a founding decision that many competitors treated as commercially impractical: requiring independent, third-party laboratory verification of every batch before any vial could reach a customer. That decision translated into a fixed two-checkpoint release protocol—HPLC (High-Performance Liquid Chromatography) analysis to confirm molecular sequence identity and purity percentage, and a LAL (Limulus Amebocyte Lysate) endotoxin screen to certify injection-grade microbiological safety—both conducted externally and both tied to unique batch identifiers that accompany each product. Over successive production cycles, this model evolved from a founding constraint into a fully systematised quality infrastructure: batch-specific certificates of analysis became standard deliverables rather than on-request documents, giving researchers a verifiable audit trail for every compound they handle. The IGF-1 LR3 1 mg vial reflects that infrastructure directly—each unit ships with documentation confirming it cleared both external verification gates before leaving the facility.

Product details

BrandBio-Peptide
Active ingredientigf-1 lr3
Also known asIGF-1 LR3, Long R3 IGF-1, Bio-Peptide IGF-1 LR3
Strength1 mg
FormVial
Pack size1 piece
Item numberPEPT-IGFL-BIO-001

Reviews

5/5

2 reviews

  • Rating: 5 out of 5 starsmidnight25Verified purchase

    Pumps are insane on this

    Running 50mcg post workout for 4 weeks alongside 500mg test e. Pumps in the gym are stupid, like almost painful quad pumps doing squats. Bodyweight up 3.2kg and waist hasn't moved. Joints feel noticeably better too which I wasn't expecting. Bio-Peptide vials always reconstitute perfectly

  • Rating: 5 out of 5 starscreatineVerified purchase

    Solid IGF, noticed fast

    50mcg bilaterally post training. Feeling fuller within 10 days, strength ticking up steadily by week 3. Appetite went up which helped hit my surplus. Vial was properly sealed, came cold-packed. Will be a staple in my blast from now on

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

IGF-1 LR3 1mg/vial 1 Vial by Knoll PharmaceuticalsHPLC Verified

IGF-1 LR3 1mg/vial 1 Vial by Knoll Pharmaceuticals

€30.00
IGF-1-LR3Batch Tested

IGF-1-LR3 2mg/vial 1 Vial by Bluepeps

€54.00
IGF-1 LR3Top Seller

IGF-1 LR3 1mg/vial 1 Vial by Master Pharma

€35.00

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