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IGF-1 LR3
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IGF-1 LR3
Muscle / GH
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Long-acting IGF-1 analog studied for muscle growth.
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Class
IGF-1, muscle
Forms
Injectable
Typical dose
20 to 50 mcg/day
Cycle
4 to 6 weeks
Onset
Fullness over weeks
Tolerance
Low blood sugar risk
Educational summary. See Sources & research below for the underlying studies.
What it is
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IGF-1 LR3 is a long-acting IGF-1 for muscle growth, an advanced compound.
• Best for: experienced users chasing muscle growth
• Caution: can drop blood sugar (hypoglycemia)
• Long-acting, so once daily
How it works
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It activates IGF-1 receptors to grow muscle cells.
• Drives muscle-cell growth and nutrient uptake
• The LR3 form resists breakdown, so it lasts
• Can lower blood sugar as a side effect
Dosing and mixing
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Reference tiers only. Track the dose you are already taking.
Low
20 mcg/day
FOR Easing in, watching blood sugar
BENEFIT Often picked as the lower-exposure tier by people monitoring blood sugar
Standard
30 to 50 mcg/day
FOR Muscle growth, experienced users
BENEFIT The range most often cited in fullness and growth discussions
High
50 to 100 mcg/day
FOR Aggressive growth, advanced only
BENEFIT A higher-exposure tier with greater hypoglycemia risk
Schedule: Once daily, often post-workout. 4 to 6 week blocks.
Beginner ramp: Start low, eat carbs nearby to manage blood sugar.
Mixing (reconstitution)
BAC water is bacteriostatic water, the sterile water you mix in.
A 1 mg vial with 1 mL BAC water is a common starting point.
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Ranges are reference only, not a recommendation. See Sources & research below.
How to take it
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Inject under the skin once a day, often post-workout.
• Have carbs handy in case blood sugar dips
• Rotate the spot to avoid irritation
• Refrigerate the mixed vial between doses
What to expect
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Week 1
Fuller-looking muscles, possible light-headedness if undereating.
Weeks 2 to 4
Better pumps and recovery.
Weeks 4 to 6
Main growth window, then take a break.
Keep in mind
Manage blood sugar, this is an advanced compound.
Side effects
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Commonly reported
• Low blood sugar (shaky, sweaty)
• Injection-site reaction
See a clinician if
• Severe hypoglycemia (confusion, fainting)
Storage
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Keep it cold, before and after mixing.
• Powder: refrigerate
• After mixing: fridge, use within about 4 weeks
• Do not freeze, keep out of light
Common stacks
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• IGF-1 LR3 + a GH peptide: an advanced pairing for people researching IGF-1 and GH pathways
Sources & research
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Growth-factor studies
Drives muscle-cell growth via IGF-1 receptors.
Practical note
Blood-sugar management is the key safety point.
Sources are provided for education and are not exhaustive. Where a source names a specific trial or journal it is shown above; always confirm with a licensed clinician.
Educational and research information only. Not medical advice. Always confirm dosing and safety with a licensed clinician.
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