Frequently Asked Questions
What is bacteriostatic water?
Bacteriostatic water is sterile water containing 0.9% benzyl alcohol, which helps prevent bacterial growth. It's used for reconstituting peptides and allows multi-use access to a vial.
Can I shake the vial to mix the peptide?
No. Shaking can damage delicate peptides. Always inject BAC water gently down the vial wall and swirl gently if needed.
How long is a peptide good for after mixing?
Most reconstituted peptides are stable for 30 days when refrigerated, but this varies by compound. Always refer to manufacturer guidance.
How should I store reconstituted peptides?
Store in a refrigerator between 36–46°F (2–8°C). Avoid freezing or exposing to direct sunlight.
What if I only want to reconstitute with 80 units instead of 1 mL?
That’s why PeptiCalc lets you calculate based on either mL or insulin syringe units. Enter your BAC water volume using units or mL — the calculator will adjust accordingly.
Are these peptides legal to use?
Many peptides are research chemicals or require a prescription depending on jurisdiction. You should consult a medical provider and follow applicable laws before using any peptide therapy.
What’s the difference between mg and mcg?
1 milligram (mg) = 1,000 micrograms (mcg). PeptiCalc supports both units for flexibility depending on your peptide strength.
What is a GLP-1 peptide?
GLP-1 peptides mimic the glucagon-like peptide hormone. Examples include semaglutide (Ozempic/Wegovy) and tirzepatide (Mounjaro/Zepbound). They're often used for blood sugar control and weight loss.