Dosing Guide — 2026-10-28
IGF-1 LR3 is one of the more technical compounds in muscle and cell-proliferation research — it's potent at small doses, a little fragile once mixed, and carries a real hypoglycemia consideration that the GH-releasing peptides don't. None of that is complicated once it's laid out plainly, which is what this guide does: what it is, how to mix a 1mg vial, the daily dose, and the handful of precautions that actually matter. For laboratory research use only.
Pricing and the batch COA are on the IGF-1 LR3 1mg page, and the exact protocol is in the IGF-1 LR3 dosing guide. Both linked again below.
IGF-1 LR3 (Long R3 insulin-like growth factor) is a modified version of IGF-1 with a much longer half-life, studied for cell proliferation and muscle research. For the mechanism and how it differs from growth hormone itself, IGF-1 LR3 research overview and IGF-1 LR3 vs HGH are the two best starting points.
IGF-1 LR3 is a daily compound dosed in micrograms, not milligrams — small pulls are normal and expected here. After mixing the 1mg vial with 1 mL of bacteriostatic water:
| Dose | Units (U-100 syringe) |
| 20 mcg | 2 units |
| 30 mcg | 3 units |
| 50 mcg | 5 units |
The common research range is 20–50 mcg daily, injected subcutaneously post-workout, close to the muscle group worked that day.
Add exactly 1 mL of bacteriostatic water to the 1 mg vial:
Those 2–5 unit pulls are small, so measure carefully. Inject the water down the vial wall, swirl gently, and refrigerate immediately — IGF-1 LR3 is more fragile than most peptides. You'll need bacteriostatic water for reconstitution.
IGF-1 LR3 can lower blood glucose significantly. Watch for shakiness, dizziness, or other hypoglycemia symptoms, and eat fast-acting carbohydrates within about 30 minutes of injection to blunt the glucose drop. This is the single most important handling note for the compound — more so than anything about the dose itself.
Cycles of 4–6 weeks are common; 8 weeks is considered aggressive. Take at least 4 weeks off between cycles — many experienced researchers prefer 6–8 weeks off, and a 5-on/2-off weekly pattern is popular to manage receptor sensitivity. IGF-1 LR3 is frequently studied alongside GH-releasing peptides like CJC-1295 + Ipamorelin; the IGF-1 LR3 stacking guide covers how those combinations are structured.
This is the fragile one. Refrigerate immediately after reconstitution and use within about two weeks — a shorter window than the four weeks typical of sturdier peptides. Keep the dry powder cold before mixing and avoid freeze-thaw cycles entirely.
Because the doses are tiny, an inaccurately filled or impure vial throws your protocol off more here than with any milligram-dosed compound. Every IGF-1 LR3 1mg vial from Platinum Biolabs ships with a batch-matched COA at 99%+ HPLC purity, handled from a US facility. Code PLATINUM25 takes 25% off at checkout. For expected results over a cycle, see the IGF-1 LR3 results timeline.
Disclaimer: All information presented in this article is for educational and informational purposes only. Platinum Biolabs does not promote or endorse the use of peptides for human consumption. All products sold by Platinum Biolabs are intended strictly for laboratory and research use only. Consult a qualified healthcare professional before making any health-related decisions.