The Peptide Guide
Growth Factor (IGF/MGF)

IGF-1 LR3: dose range, storage & handling reference

Also known as: Long R3 IGF-1, Long Arg3 IGF-1

Quick answer

What is IGF-1 LR3?

A long-acting version of IGF-1 (the growth factor GH works through), studied for muscle growth and recovery.

IGF-1 LR3 at a glance

Dose range referencedCommonly referenced in literature around 20–50 mcg per day (research reference only)
Studied forStudied as a long-acting IGF-1 analog in cell-growth and anabolic-signaling research
Route referenced in researchSubcutaneous or intramuscular (research)
Half-life~20–30 hours (extended relative to native IGF-1)
StorageLyophilized powder stored frozen or refrigerated away from light; reconstituted solution refrigerated (2–8 °C) and used within a few weeks

The dose range above describes figures referenced in research literature. It is not a recommendation.

What IGF-1 LR3 is stacked with in research

Sometimes discussed alongside growth-hormone secretagogues in research contexts

Side effects observed in research

  • Hypoglycemia-type symptoms cited in studies
  • Injection-site reaction
  • Lightheadedness reported anecdotally

Reconstituting IGF-1 LR3

Concentration is vial contents divided by water added, whatever the compound: a 5 mg vial with 2 mL of bacteriostatic water gives 2.5 mg/mL. The step-by-step reconstitution guide works through the arithmetic, and the free calculator below returns exact syringe units.

This is a reference entry. An expanded profile — mechanism, cited literature, protocol tables and reconstitution math — is being added across the library.

Skip the IGF-1 LR3 math

Enter vial size, water volume, and target dose — the free calculator returns concentration, injection volume, and exact U-100 syringe units.

Calculate

Convert vial, water, and dose into syringe units.

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Source in Canada

COA-documented research compounds, sourced from Canada.

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Related research peptides

Browse all Growth Factor (IGF/MGF) peptides or start with the beginner’s guide to research peptides.