
- Formula
- C187H291N45O59
- Half-life
- ≈ 7 days

IGF-1 LR3 · Lyophilized powder (vial)
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IGF-1 LR3 is a long-acting analogue of insulin-like growth factor 1, with 13 extra amino acids and one substitution that stop it binding IGF binding proteins.
It activates the IGF-1 receptor for much longer than natural IGF-1, driving cell growth and glucose uptake.
There is no approved human dose. The approved IGF-1 medicine (mecasermin) is a different molecule used for rare growth disorders.
Label and guideline amounts are shown for reference only. They are not a recommendation, and we never give cycle or performance amounts. Any use belongs under a doctor’s care, with bloodwork.
Converts an amount you enter into what to measure. It does not suggest an amount.
Strength used: 1 mg per vial
IGF-1 LR3 1mg is a freeze-dried powder. After mixing with bacteriostatic water, compounds like this are usually injected subcutaneously (subQ): into the fat just under the skin with a short insulin needle.
Finding it. Anywhere on the belly at least 5 cm from the navel, avoiding scars and the belt line. Pinch a fold of skin and inject into it.
Why it is used. The most-used subcutaneous site: easy to see, plenty of fat and steady absorption. Weekly GLP-1 pens list it first.
Watch out. Move each injection 2 to 3 cm from the last to avoid hard lumps.
Finding it. The middle of the front of the thigh, a hand-width below the hip and a hand-width above the knee.
Why it is used. Easy to reach seated and a good second site to rotate with the belly.
Watch out. Absorption can be a little slower than the belly.
Finding it. The fleshy back of the upper arm, halfway between shoulder and elbow.
Why it is used. A third site to rotate through so each spot rests longer.
Watch out. Hard to pinch and reach on yourself; a helper makes it easier.
Every time: wash your hands, wipe the vial stopper and skin with alcohol, use a new sterile needle and syringe, and never share. See a doctor for spreading redness, heat, swelling, pus, fever or numbness. This is general guidance from standard nursing practice, not medical advice; a pharmacist or nurse can show you in person.
IGF-1 lowers glucose like insulin.
A theoretical concern for anyone with a history of cancer.
No human trials.
Prohibited by WADA.
People under 18, anyone pregnant or breastfeeding, anyone with active cancer or a history of cancer, and anyone with diabetes unless a doctor is involved.
Health Canada has not approved this compound for human use. It is sold for research purposes, and most sports bodies prohibit it. This is general information, not legal advice.
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Long R3: the extra sequence and arginine substitution that make it long-acting.
No, but it can lower blood sugar.
1 mg.
Orders ship from Vancouver by Canada Post Xpresspost. You get a tracking number within 72 hours of payment; delivery then takes 1 to 2 business days in BC, 3 to 4 in Ontario and 3 to 5 in Quebec.
We reship it free. Contact us with your order number.
Adults 18+. This page is general information, not medical advice. Talk to a licensed healthcare provider before using any compound.




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