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Mechanism of action
IGF-1 LR3 is a long-acting IGF-1 analog researched for IGF-1 receptor signaling, amino-acid uptake, nutrient partitioning, and tissue-growth pathway activity. Glucose monitoring and conservative exposure are central.
Half-life & pharmacokinetics
Half-life: Extended vs native IGF-1; context dependent.
LR3 modification extends functional exposure compared with native IGF-1. Human research-use PK depends on formulation and route; glucose-aware interpretation is required.
Research dosing reference
10-40 mcg daily; glucose-aware conservative exposure is central.
Dose interpretation (U-100 units)
| Target dose | U-100 units |
|---|---|
| 10 mcg | 1 units |
| 20 mcg | 2 units |
| 40 mcg | 4 units |
Units are concentration-specific - confirm against your actual reconstitution volume.
Reconstitution & concentration
| Vial | Preferred reconstitution | Final concentration |
|---|---|---|
| 1 mg | 1 mL AA water preferred for stability; dilute only if protocol requires | 0.010 mg/unit |
Injection timing
Often placed around training or recovery windows; avoid first exposures when glucose cannot be monitored.
Beginner escalation
Begin very conservatively due to glucose implications and receptor potency.
Side-effect mitigation
Monitor hypoglycemia-like symptoms, fatigue, edema, numbness/tingling, and glucose response.
Stack compatibility
Avoid combining aggressively with insulin-sensitizing or GH/IGF-heavy stacks without monitoring.
Storage & stability
Use solvent appropriate to formulation. Refrigerate after reconstitution, protect from heat/light, and avoid repeated temperature cycling.
Protocol duration & reassessment
Use short, glucose-aware blocks with frequent reassessment. Avoid prolonged or stacked IGF-axis exposure without marker review and clear objective.
Frequently asked questions
What is IGF-1 LR3 and how does it work?
IGF-1 LR3 is a long-acting IGF-1 analog researched for IGF-1 receptor signaling, amino-acid uptake, nutrient partitioning, and tissue-growth pathway activity. Glucose monitoring and conservative exposure are central.
What is the half-life of IGF-1 LR3?
IGF-1 LR3: Extended vs native IGF-1; context dependent. LR3 modification extends functional exposure compared with native IGF-1. Human research-use PK depends on formulation and route; glucose-aware interpretation is required.
How is IGF-1 LR3 reconstituted for research?
Preferred reconstitution for the 1 mg vial is 1 mL AA water preferred for stability; dilute only if protocol requires, giving 0.010 mg/unit. Always confirm concentration math before any use. Research use only.
Is IGF-1 LR3 FDA approved?
No. IGF-1 LR3 is an investigational research-use-only compound - not for human or animal consumption and not FDA approved.
IGF-1 LR3 product overview · IGF-1 LR3 cost · All research reference · Research guides
External references: Peptide (Wikipedia) · U.S. Food and Drug Administration