PEG-IGF-1 Reconstitution Calculator
Enter the amount you want to measure. The vial buttons will highlight which vial strengths create cleaner syringe-unit measurements.
⚠ Use acetic acid — not bacteriostatic water
PEG-IGF-1 is insoluble or unstable in standard BAC water. Manufacturer protocols require reconstitution in dilute acetic acid (0.1%) — or, for IGF-1 variants, 50 mM acetic acid. Volumes shown below refer to acetic acid, not water.
What amount do you need?
Type the target amount, then choose mg or mcg. Example: 2mg or 500mcg.
Syringe size:
Possible vial strengths:
Best Match
Good Match
Usable
Harder to Measure
Example PEG-IGF-1 Titration Schedule
| Parameter | Details |
|---|---|
| Typical Dosage (SC injection) | 0.3 – 8 mg (research up to 200-400 mcg) |
| Route | Subcutaneous (SC) or Intramuscular (IM) into targeted muscle |
| Frequency | Once every 3–8 days, ideally once weekly |
| Cycle Length | Usually 4–6 weeks on, followed by 4–6 weeks off |
| Half‑life | Greatly extended to 140–200 hours (6–8 days) |
| Reconstitution | Use sterile bacteriostatic water or 0.6% acetic acid (AA) |
| Reconstitution Storage | Refrigerate (2-8°C) and use within 2–7 days |
Possible vial strengths:
What Is It?
PEG-IGF-1
Pegylated IGF-1 with extended half-life.
Acetic Acid (0.1%)
A dilute solution of acetic acid (typically 0.1% for most peptides, or 50 mM for IGF-1 variants) used to reconstitute peptides that are insoluble or unstable in standard bacteriostatic water. PEG-IGF-1 requires an acidic carrier to dissolve fully and remain stable — plain BAC water will not work and may damage the peptide.
How To Mix PEG-IGF-1
1
CleanUse alcohol swabs to clean the tops of both vials.
2
Draw Acetic AcidDraw the selected amount of 0.1% acetic acid.
3
Inject SlowlyAdd the liquid slowly down the side of the vial.
4
Swirl GentlyDo not shake. Swirl gently until dissolved.
5
Store ProperlyStore as directed and protect from heat and light.
Best Practices & Common Mistakes
Best Practices
- Use sterile technique.
- Protect from light and heat.
- Store refrigerated when appropriate.
- Use clean syringe-unit math before measuring.
Common Mistakes
- Confusing milligrams with milliliters.
- Choosing an option with awkward decimal units.
- Using too little liquid for very small measurements.
- Shaking the vial aggressively.
PEG-IGF-1 Storage & Handling
Lyophilized Powder: −20°C (−4°F) for long-term storage (up to 24 months). Refrigeration 2–8°C (36–46°F) for short-term use (up to ~3 months). Original sealed vial in the freezer is safest.
Reconstituted Solution: 2–8°C (36–46°F), use within ~7–14 days. Keep sealed, avoid light, and do not repeat freeze-thaw cycles.
Reconstituted Solution: 2–8°C (36–46°F), use within ~7–14 days. Keep sealed, avoid light, and do not repeat freeze-thaw cycles.
Frequently Asked Questions
Natural IGF‑1 has a plasma half‑life of less than 12 hours, but PEGylation extends this to 140–200 hours — approximately 6–8 days. Your calculator's daily‑dosing logic will mislead you; for PEG‑IGF‑1 you must reduce the injection frequency dramatically, for example, by switching to once‑a‑week or even less frequent intervals.
Because of the PEG chain, PEG‑IGF‑1 is poorly soluble in plain BAC water. According to data for similar PEGylated growth factors, the recommended in vivo vehicle is a complex mix, such as 30% PEG400 + 0.5% Tween‑80 + 5% propylene glycol. If your calculator suggests a very high concentration with a low volume of BAC water, the peptide will likely remain cloudy or precipitate, leading to inaccurate dosing.
Reconstituted PEG‑IGF‑1 should be stored at 4°C for only 2–7 days. For longer‑term preservation you must freeze the solution in single‑use aliquots (preferably with a carrier protein, e.g. 0.1 % HSA or BSA). Your calculator’s generic 28‑day refrigerator assumption will cause premature degradation.
The lyophilised powder is stable for up to 3 years at –20 °C. However, once reconstituted, the PEG chain significantly reduces water solubility, so sterile water or BAC water alone will not be sufficient. Always use the validated vehicle for complete dissolution.
Unlike native IGF‑1, PEG‑IGF‑1 causes only a modest decrease in GH, and no hypoglycaemia has been observed. On the other hand, the most frequent adverse event is injection‑site erythema (redness and swelling). Your calculator cannot warn you about this, but it is an important safety parameter when planning long‑term weekly dosing.
Practical takeaway: If your real goal is weight or metabolic health, the most useful next step is discussing approved treatment options with a clinician rather than relying on an unapproved compound.
Important: This tool is for informational and research-reference purposes only. Not intended for human or veterinary use.