IGF-1 LR3
Long acting IGF-1 analog
Long acting IGF-1 that keeps the anabolic signal open for hours.
Also sold as
Research chemical vendors can't legally label products with the real name, so IGF-1 LR3 often appears under coded SKUs. If you're shopping and see any of these, it's the same compound:
- LR3
- IGF LR3
- Long R3 IGF
Codes shown are for identification only.
Your draw
What it actually is
IGF-1 LR3 is an IGF-1 analog with an Arg3 substitution and a 13 amino acid extension that resists binding proteins, extending its half life dramatically over native IGF-1. It drives hyperplasia and nutrient partitioning systemically.
40mcg post workout is typical; sensitive users start at 20mcg. Watch blood glucose closely, hypoglycemia is the main acute risk. 4 weeks on, 4 off.
Why people use it
- Growth signal that GH secretagogues alone cannot reach
- Nutrient partitioning and glycogen loading in muscle
- Short, aggressive growth blocks
Educational only · Not a vendor claim
How it works
An IGF-1 analog engineered to resist binding proteins, extending systemic IGF-1 receptor activation for hours.
Health benefits
- Strong anabolic signal
- Nutrient partitioning into muscle
- Glycogen loading
- Supports hyperplasia
What you'll feel
- Pronounced muscle fullness
- Increased hunger
- Occasional low blood sugar sensations
Pros
- Reaches growth signaling GH secretagogues cannot
- Very effective in short blocks
- Low volume dosing
Cons
- Hypoglycemia risk
- Long term safety concerns around tissue growth
- Requires careful glucose monitoring
Side effects to know
- Hypoglycemia (shakiness, sweating)
- Injection site irritation
- Joint aches
- Headache
Best suited for
Educational summary · Not medical advice · Discuss with a qualified clinician
Typical timeline
General pattern for the Muscle category. Individual response varies.
- Week 1Deeper sleep, vivid dreams, possible morning hand tingling — normal GH-axis signals.
- Weeks 2–4Recovery between sessions improves. Modest fullness in muscles from mild water retention.
- Weeks 4–8Body comp changes become visible. Fat drops slightly, muscle looks fuller. Bloodwork check recommended.
- Weeks 8+Cycle off for at least equal time to restore natural pulsatility. Track IGF-1 if running longer.
The reconstitution math
- 1Reconstitute the 1 mg vial with 1 mL of bacteriostatic water. Tilt — don't shake.
- 2Concentration becomes 1,000 mcg/mL (1 mg/mL).
- 3For a 40 mcg dose, draw 0.040 mL — that's 4 units on a 1 mL insulin syringe.
- 4One vial gives you approximately 25 doses.
Reminder: 100 units on an insulin syringe = 1 mL. Always start at half the listed dose for the first week and rotate injection sites between arms, legs, abdomen, and glutes.
Dose logging is available for signed in users. Track today's dose and notes for IGF-1 LR3.
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Prefilled with 1 mg, 1 mL BAC water, and a 40 mcg dose.
Printable units-to-micrograms lookup for every common vial and water volume.
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