How do I reconstitute a peptide?

To reconstitute a peptide: 1) Use bacteriostatic water (BAC water) for reconstitution. 2) Draw the desired amount of water into a syringe. 3) Slowly inject the water into the vial, aiming at the side wall to avoid damaging the peptide. 4) Gently swirl (don

How much bacteriostatic water should I add?

The amount of water you add determines your concentration. More water = lower concentration = larger injection volume. For peptides like BPC-157 (5mg vial), adding 2mL of water gives you 2.5mg/mL (or 250mcg per 0.1mL). This calculator automatically computes the optimal water amount for your desired dose.

What is the difference between mcg and mg?

1 mg (milligram) = 1,000 mcg (micrograms). Most peptide doses are measured in micrograms (mcg) because effective doses are very small. For example, a typical BPC-157 dose is 250 mcg, which equals 0.25 mg.

How long does reconstituted peptide last?

Reconstituted peptides typically last 3-4 weeks when stored properly in a refrigerator at 2-8°C (35-46°F). Never freeze reconstituted peptides. Protect from light and avoid repeated freeze-thaw cycles. Some peptides like Semaglutide can last up to 8 weeks refrigerated.

What syringe size should I use?

For most peptide injections, a 0.5mL or 1mL insulin syringe works well. Use smaller syringes (0.3mL) for very small doses as they allow more precise measurements. 29-31 gauge needles are standard for subcutaneous peptide injections.

What's the difference between prescription and research peptides?

Prescription peptides (like Semaglutide/Ozempic) are FDA-approved, manufactured to pharmaceutical standards, and obtained through a doctor with a prescription. Research peptides are not FDA-approved for human use, sold

Can I mix multiple peptides in one syringe?

Some peptides can be mixed in the same syringe for injection (not storage), such as CJC-1295 + Ipamorelin. However, never mix peptides with different reconstitution requirements or those that may interact. When in doubt, inject separately.

PeptideKey

Peptide Calculator: BPC-157 250mcg Dosing? Calculate It

Calculate precise peptide measurements for your research with our interactive tool. Ensure accuracy and efficiency in your experimental protocols.

This page is part of PeptideKey's evidence-based peptide research library covering 100+ compounds with lab-verified purity data.