IGF-1 LR3
Also known as: Long R3 IGF-1, IGF-1 Long R3
limited human dataWADA bannedNot FDA approvedResearch only
Published Dose Range
Low20 mcg/day
Typical40-80 mcg/day
High100 mcg/day
Beginners 20-40 mcg. Female athletes 20-40 mcg. 5 days on / 2 off common.
Published Cycle Range
Short4 wks
Typical5 wks
Long8 wks
4-6 weeks standard, max 8 weeks. Desensitization with prolonged use.
Off-cycle: 4 weeks
Administration
Routessubcutaneous, intramuscular
Frequency5 days on / 2 days off
Preferred timingPost-workout
Always pair with carbs post-workout (hypoglycemia risk)
Safety Profile
Contraindications
- • Cancer history (cell proliferation)
- • Diabetes (glucose)
- • Under 18
Common side effects
- • Injection site inflammation
- • Water retention
Serious risks
- • Hypoglycemia (primary risk)
- • Receptor desensitization
- • Gut growth at high doses
- • Insulin resistance with chronic use
Requires monitoring
- • Blood glucose
- • IGF-1 levels
Pregnancy / breastfeeding
No data — consult clinician
Sex-Specific Notes
Male
Standard dose 40-100 mcg/day
Female
Lower dose 20-40 mcg/day. No virilization. No androgenic/estrogenic effects.
Common Misconceptions
- Promotes hyperplasia (new muscle fibers), not just hypertrophy
Commonly Stacked With
MK-677CJC-1295BPC-157GHRP-2Ipamorelin
- Monitor blood glucose closely when stacking with other GH-elevating compounds
Next Steps
Sign in to calculate your dose, add this compound to your stack, and check for interactions with your current cabinet.