Dosing
How muchdo I take?
Timing
Best time to take
Post-workout is ideal for training days—your muscles are like sponges ready to absorb nutrients. On rest days, morning with breakfast works well. Some users split doses between pre and post-workout.
With food?
Always have food available! IGF-1 LR3 can cause significant blood sugar drops. Eat a meal with protein and carbs within 30 minutes of injection. Never inject fasted unless you're very experienced.
If stacking
If stacking with growth hormone (HGH), inject IGF-1 LR3 at least 2-3 hours apart to avoid competition for receptors. Can be combined with MGF for potentially synergistic muscle-building effects.
Adjusting Your Dose
Increase if
+You've tolerated starting dose for 2+ weeks with no hypoglycemia issues
+Results have plateaued at current dose after 3-4 weeks
+Your training intensity has increased and you need more recovery support
+Blood sugar remains stable and you're eating consistently
Decrease if
-You experience shakiness, dizziness, or hypoglycemia symptoms
-Headaches persist beyond the first week
-Joint pain or water retention becomes uncomfortable
-Any side effect that concerns you—trust your body
Signs of right dose
✓Steady improvements in muscle fullness and recovery
✓Stable blood sugar with no hypoglycemic episodes
✓Improved workout performance and reduced soreness
✓No significant water retention or joint discomfort
Dosing Calculator
Calculate Your Exact Dose
Step 1: Peptide Weight
Find the weight printed on your peptide vial label
Look here!
The peptide weight is printed on the label
The weight is on the label
Select Weight
Look for a number followed by 'mg' on the vial label (e.g., 5mg, 10mg)
Administration
How do Iuse it?
Reconstitution
What you need
•Bacteriostatic water (BAC water)—the benzyl alcohol preservative keeps it sterile for multiple uses
•Insulin syringes (29-31 gauge)—1mL syringes with 100 unit markings work best
•Alcohol swabs for cleaning vial tops and injection sites
•Your IGF-1 LR3 powder vial (typically 1mg/1000mcg)
Example
If you have a 1mg (1000mcg) vial and add 2mL of BAC water, you get a concentration of 500mcg/mL. So every 0.1mL (10 units on an insulin syringe) equals 50mcg of IGF-1 LR3.
For a 50mcg dose at 500mcg/mL: draw 0.1mL (10 units). For 100mcg: draw 0.2mL (20 units). Always double-check your math—this peptide is potent!
Injection
Route
Subcutaneous injection (under the skin) is most common; intramuscular injection into specific muscles is also used for localized effects
Best sites
•Abdomen (2 inches from belly button)—most common for subcutaneous
•Target muscle (bicep, quad, etc.)—for site-specific enhancement
•Front or outer thigh—alternative subcutaneous site
•Upper arm fat pad—another subcutaneous option
Technique
1.Wash your hands thoroughly with soap and water
2.Clean the injection site with an alcohol swab, let it air dry completely
3.For subcutaneous: pinch about an inch of skin and insert at 45-90 degrees
4.For intramuscular: insert straight into the muscle belly at 90 degrees
5.Inject slowly and steadily—rushing can cause more discomfort
6.Wait 5-10 seconds before withdrawing the needle
7.Apply light pressure if needed, but don't rub the site
Storage
Before reconstitution
Keep your IGF-1 LR3 powder refrigerated at 36-46°F (2-8°C) for storage up to 1 month. For longer storage, freeze at -4°F (-20°C) or below. The powder is quite stable when kept cold and away from light.
After reconstitution
Once mixed with bacteriostatic water, refrigerate at 36-46°F (2-8°C). Never freeze the mixed solution—ice crystals will destroy the peptide structure. Keep away from light and use within 28-30 days.
Signs of degradation
Cloudy or hazy solution (should be crystal clear)
Visible particles floating or settled at bottom
Any color change—fresh solution is colorless
Unusual smell—properly reconstituted peptide has minimal odor
Sample Daily Schedule
Post-workout (within 30 minutes of finishing)
40-80 mcg depending on experience level injection
Site: Subcutaneous near abdomen or intramuscular into trained muscle
Training days: inject immediately after workout when muscles are primed for nutrient uptake. Have a protein and carb meal ready within 30 minutes to prevent hypoglycemia and maximize anabolic effect.
Morning with breakfast (rest days)
Same dose as training days injection
Site: Subcutaneous near abdomen
Rest days: inject with your morning meal. Continue cycles for 4-6 weeks, then take at least 4 weeks off to allow receptor sensitivity to reset. Some users do 5 days on, 2 days off.
Safety
Is itsafe?
Safety Profile
IGF-1 LR3 has been extensively studied in research settings and shows a predictable side effect profile when used responsibly. The primary concern is hypoglycemia, which is manageable with proper nutrition timing. Long-term safety data in humans is limited since it's used as a research compound. Joint discomfort and water retention are generally mild and resolve when cycling off.
Most safety data comes from animal studies and limited human research contexts. While these suggest a favorable profile at moderate doses, large-scale human clinical trials haven't been conducted. Always work with a healthcare provider familiar with peptide research when using any research compound.
Common Side Effects
Experienced by some users
Hypoglycemia (low blood sugar)
This is the most important side effect to understand. IGF-1 LR3 acts like insulin and drives glucose into cells, which can leave you feeling shaky, dizzy, or weak.
Management: Always eat within 30 minutes of injection. Keep fast-acting carbs (juice, glucose tablets) nearby. Learn your body's warning signs: shakiness, sweating, hunger, confusion.
Injection site reactions
Redness, slight swelling, or itching at the injection site is normal and usually fades within a day.
Management: Rotate injection sites regularly. Use proper sterile technique. A cool compress can help if irritation occurs.
Water retention
Some puffiness or bloating, especially in hands and face, as IGF-1 causes cells to hold more water.
Management: Usually mild and temporary. Moderate sodium intake, stay well-hydrated, and it typically resolves as your body adjusts or when you cycle off.
Headaches
Particularly common in the first week as your body adjusts to the peptide.
Management: Stay hydrated, don't skip meals, and the headaches usually subside after the first week. If persistent, consider reducing dose.
Less Common
•Joint pain or stiffness
•Numbness or tingling
These typically resolve with continued use or dose adjustment.
Stop and Seek Help If
×Any severe hypoglycemic episode that doesn't resolve quickly with food
×Persistent numbness, tingling, or carpal tunnel symptoms
×Joint pain that interferes with training or daily activities
×Signs of allergic reaction (rash, swelling, difficulty breathing)
×Any concerning or unusual symptoms that worry you
×Completion of your planned cycle (typically 4-6 weeks)
IGF-1 LR3 is a research compound, not approved for human therapeutic use by the FDA. This information is for educational purposes only and not medical advice. Always consult with a healthcare provider before starting, stopping, or modifying any research protocol.
Interactions
With other peptides
✓Potentially synergistic for muscle growth. MGF works locally while IGF-1 LR3 works systemically. Can be used together with careful timing.
✓Can be stacked for complementary effects—CJC increases natural GH release while IGF-1 LR3 provides direct IGF effects. Space injections apart.
✓Safe to combine. GHRP-6 stimulates hunger which can actually help prevent hypoglycemia from IGF-1 LR3.
!DANGEROUS combination. Both lower blood sugar dramatically. Severe hypoglycemia risk. Do NOT combine unless under strict medical supervision.
With medications
!Diabetes medications (Metformin, Sulfonylureas) - Increased hypoglycemia risk. Blood sugar-lowering effects compound dangerously. Requires medical supervision and dose adjustments.
!Insulin (medical) - Extremely dangerous combination. Both dramatically lower blood sugar. Can cause severe, life-threatening hypoglycemia.
✓Blood thinners (Warfarin, etc.) - May increase bruising at injection sites. Not dangerous but worth monitoring.
!Beta-blockers - Can mask hypoglycemia symptoms (shakiness, rapid heartbeat), making low blood sugar harder to detect. Use with caution.
With supplements
✓Creatine - Safe and potentially complementary. Both support muscle cell function and recovery.
✓Protein supplements - Highly recommended! Adequate protein maximizes IGF-1 LR3 benefits. Take protein with or shortly after injection.
✓Chromium - May enhance insulin sensitivity, potentially increasing hypoglycemia risk. Monitor blood sugar more carefully.
✓Alpha-Lipoic Acid (ALA) - Can increase glucose uptake, compounding hypoglycemia risk. Use lower doses of both if combining.
Want the Full Picture?
View the complete IGF-1 LR3 research profile including mechanism of action, clinical studies, effectiveness timeline, and FAQ.