How to Reconstitute BPC-157: Step-by-Step Guide with Dose Chart

Preparation, bacteriostatic-water math, storage, and subcutaneous-injection technique for lyophilized BPC-157, plus a ready-reference dose chart in both mL and U-100 insulin-syringe IU.

Last updated: 2026-04-21 · Maintained by the VitaLog team

What you'll need

• BPC-157 lyophilized vial (usually 2 mg, 5 mg, or 10 mg)
• Bacteriostatic water (0.9% benzyl alcohol preserved, not sterile water; bacteriostatic contains the preservative that keeps the peptide stable for weeks)
• U-100 insulin syringes, 29-30 gauge × 8 mm, for subcutaneous injection
• A larger-capacity syringe (1 mL or 3 mL) for reconstitution transfer only
• Isopropyl 70% alcohol prep pads
• Clean flat work surface
• Sharps container

Step-by-step procedure

1. Sanitize

Wash hands with soap and water. Swab both the BPC-157 vial rubber stopper and the BAC water vial rubber stopper with a fresh isopropyl-alcohol prep pad. Allow both to air-dry for 10-15 seconds, wet alcohol on the septum can enter the vial when the needle pierces it, which is undesirable for preserving peptide stability.

2. Draw the bacteriostatic water

Using a graduated reconstitution syringe (1 mL or 3 mL size), draw the desired volume of bacteriostatic water. A 5 mg BPC-157 vial is most commonly reconstituted with 2 mL of BAC water, this gives a final concentration of 2.5 mg/mL = 2500 mcg/mL, which makes subsequent dose math simple on a U-100 insulin syringe.

If your vial is a different size, keep the same 2.5 mg/mL concentration as a starting point: 2 mg vial → 0.8 mL BAC water, 10 mg vial → 4 mL BAC water.

Tap the barrel to send air bubbles to the top, then expel them. Wipe the needle tip with a fresh alcohol pad if it touched anything non-sterile.

3. Inject the water down the vial wall

Insert the reconstitution-syringe needle through the rubber stopper at an angle. Direct the water stream down the inside glass wall of the BPC-157 vial, not onto the lyophilized powder itself. Rapid direct impact can denature peptide bonds and creates foam that wastes material.

Release the plunger slowly. The dry white BPC-157 powder will begin to dissolve on contact.

4. Swirl gently, do not shake

Remove the empty reconstitution syringe. Gently swirl or roll the vial between your palms for 15-30 seconds until the powder is fully dissolved. The solution should look clear or very slightly opalescent.

Do not shake vigorously. Shaking generates foam, which denatures peptide structure. If you see foam, let the vial sit upright in the fridge for 10 minutes, the foam will dissipate.

5. Label and store

Write the reconstitution date and final concentration on the vial label using a permanent marker. Example label: 2.5 mg/mL, 2026-04-21.

Store upright in the refrigerator at 2-8 °C. Reconstituted BPC-157 in bacteriostatic water retains practical potency for approximately 30-45 days at refrigeration temperature. Discard immediately if the solution becomes cloudy, develops a yellow or brown tint, or shows visible precipitate, regardless of age.

6. Calculate and draw the dose

Swab the freshly-labelled BPC-157 vial with a fresh alcohol pad. Pull back the plunger of a U-100 insulin syringe to match the target volume, insert through the stopper, push the plunger to inject air into the vial (equalizes pressure), invert the vial, and draw the dose slowly.

For a 5 mg vial + 2 mL BAC water + 250 mcg dose:

Concentration = 5 mg / 2 mL = 2.5 mg/mL = 2500 mcg/mL
Draw volume   = 250 mcg / 2500 mcg/mL = 0.1 mL
U-100 IU      = 0.1 mL × 100 = 10 IU

Use VitaLog's peptide dose calculator to convert any dose instantly.

Ready-reference dose chart

For a 5 mg vial reconstituted with 2 mL BAC water (concentration: 2500 mcg/mL):

For different vial sizes or water volumes, use the calculator.

Injection-site rotation

Subcutaneous injection into fatty tissue using a short 27-30 gauge needle. Rotate between sites to prevent local irritation:

• Left abdomen (≥5 cm lateral to the navel)
• Right abdomen (≥5 cm lateral to the navel)
• Left anterior thigh (middle third)
• Right anterior thigh (middle third)
• Left deltoid (upper outer)
• Right deltoid (upper outer)

Pinch the skin, insert at 45-90°, inject slowly, withdraw, apply brief pressure. VitaLog's in-app cycle tracker records the last-used site for each compound so you can rotate systematically without manual bookkeeping.

Storage & stability quick facts

BPC-157 half-life & dose frequency

No human pharmacokinetic studies of BPC-157 have been published. All reported kinetic parameters are extrapolated from animal studies (rat, mouse, canine). Reported terminal half-life after parenteral administration in animals is in the low-single-digit hours (approximately 1-2 h), which is why many research protocols split daily doses into morning + evening administrations or use a single daily injection. Treat all BPC-157 PK claims as extrapolations, not measurements.

VitaLog's compound database tags BPC-157 kinetic parameters as dataQuality: extrapolated, distinguishing them from compounds with published human pharmacokinetics (like testosterone cypionate or semaglutide). The PK simulator still plots an expected serum curve using the extrapolated parameters but flags the uncertainty.

Frequently asked questions

How much bacteriostatic water should I use for BPC-157?

Most researchers use 2 mL of bacteriostatic water per 5 mg vial, giving a concentration of 2.5 mg/mL (2500 mcg/mL). This makes a 250 mcg dose equal 10 IU on a U-100 insulin syringe, easy to measure. You can use more water (for lower concentration + larger draw volumes) or less (for higher concentration + smaller draws) depending on your preference. Concentration does not affect total dose delivered.

How long does reconstituted BPC-157 last in the fridge?

Approximately 30-45 days at 2-8 °C (standard refrigerator temperature) in bacteriostatic water. The 0.9% benzyl alcohol preservative suppresses bacterial growth. Visible cloudiness, colour change, or precipitate is a reason to discard immediately regardless of age.

Subcutaneous or intramuscular, which is used?

BPC-157 research protocols commonly use subcutaneous injection. Short 27-30 gauge insulin needles into abdominal, thigh, or deltoid subcutaneous tissue are typical. Rotation between sites prevents local irritation. Intramuscular injection has been used in some animal studies but is not typical in research-human protocols.

What sites should I rotate through?

Typical subcutaneous rotation sites: left abdomen, right abdomen (both ≥5 cm from the navel), left anterior thigh, right anterior thigh, left deltoid, right deltoid. VitaLog's cycle tracker records the last-used site so you can rotate systematically.

What is a typical research dose range?

Published research doses span a wide range, typically from 100 mcg to 500 mcg per day, sometimes split into two smaller doses (morning + evening). Systemic protocols often use 250 mcg/day. Localized-injury protocols sometimes use higher doses near the injury site. This is research-context information, not prescribing guidance, consult a qualified medical professional.

Can I freeze the reconstituted vial?

Freezing is generally not recommended for reconstituted peptides, ice-crystal formation can denature the peptide structure. Refrigerate at 2-8 °C. Some protocols freeze aliquots of the concentrated reconstituted solution in single-use vials, thawing one per week; this is more disruption than most casual users need and not required for 30-45 day fridge stability.

Related guides

• Peptide dose calculator, automate the reconstitution math for any compound
• TRT bloodwork monitoring, the complete panel + interpretation rules
• VitaLog app, cycle tracking, dose-adherence streaks, PK simulation, bloodwork trends