The Bottom Line
BPC-157 reconstitution is the same process as any peptide: add bacteriostatic water to the vial, do the math, and draw your dose. The tricky part is that BPC-157 is dosed in micrograms (mcg), not milligrams, which makes accurate calculation critical. Use our free BPC-157 dose calculator (preset for common 5mg and 10mg vials) - or the general peptide reconstitution calculator for other vial sizes. Enter your vial size, BAC water volume, and target dose in mcg, and it tells you exactly how many units to draw.
BPC-157 is one of the most popular peptides for injury recovery, and reconstituting it is straightforward. The catch is that dosing happens in micrograms, not milligrams, which means one wrong decimal point is a 1,000x error. This guide walks you through the reconstitution process, the math, and the most common dosing protocols.
What Is BPC-157?
BPC-157 (Body Protection Compound-157) is a synthetic peptide derived from a protective protein found in human gastric juice. It consists of 15 amino acids and has been studied extensively in animal models for its effects on tissue repair, wound healing, tendon and ligament recovery, gut healing, and inflammation reduction.
It’s one of the most widely used peptides in the recovery and performance space. Unlike GLP-1 compounds that require slow titration, BPC-157 is run at a flat dose from day one, typically 250-500mcg injected once or twice daily, with most protocols running 4-8 weeks.
BPC-157 comes as a lyophilized (freeze-dried) powder in vials ranging from 5mg to 15mg. You reconstitute it with bacteriostatic water before injecting subcutaneously or intramuscularly near the site of injury.
Pro Tip
BPC-157 doses are measured in micrograms (mcg), not milligrams (mg). 1mg = 1,000mcg. A typical dose of 500mcg is 0.5mg. Getting this unit conversion wrong is the most common dosing mistake, and it’s a 1,000x error. Always double-check your units.
What You Need to Reconstitute
Before mixing, gather everything:
| Item | Purpose |
|---|---|
| BPC-157 vial (5mg, 10mg, or 15mg) | The lyophilized peptide powder |
| Bacteriostatic water (BAC water) | Solvent for reconstitution. Contains 0.9% benzyl alcohol as preservative |
| Insulin syringes (1mL / 100 unit) | For drawing BAC water and injecting doses |
| Alcohol swabs | To sterilize vial tops before each use |
Important
Never use sterile water or normal saline for multi-dose reconstitution. Only bacteriostatic water contains the benzyl alcohol preservative needed to prevent bacterial growth over multiple uses. Sterile water is for single-use reconstitution only. If you’re drawing multiple doses over days or weeks, BAC water is non-negotiable.
Step-by-Step Reconstitution Process
- Clean the tops of both vials (BPC-157 and BAC water) with alcohol swabs. Let dry for 10 seconds.
- Draw your chosen amount of BAC water into the syringe. Common amounts: 1mL or 2mL for 5mg vials, 2mL for 10mg vials, 3mL for 15mg vials.
- Insert the needle into the BPC-157 vial at a slight angle, aiming the stream at the glass wall. Never aim directly onto the powder cake. Peptides are fragile molecules and direct force can degrade them.
- Depress the plunger slowly, letting the water run down the side of the vial. Do NOT shake. Gently swirl the vial or roll it between your palms until the powder is fully dissolved. BPC-157 typically dissolves within 30-60 seconds.
- Check the solution. Once completely clear with no visible particles or cloudiness, your BPC-157 is reconstituted and ready to dose.
Pro Tip
BPC-157 dissolves faster than most peptides. If it’s taking more than 2-3 minutes or the solution remains cloudy, something may be wrong. The peptide could have been damaged by heat during shipping, or the powder may have already absorbed moisture before you opened it. A properly manufactured BPC-157 vial should reconstitute almost instantly with gentle swirling.
Dose Calculation: The Math Explained
BPC-157 is dosed in micrograms (mcg), but your vial is labeled in milligrams (mg) and your syringe is marked in units. Here’s how to connect them.
Remember: convert your vial from mg to mcg first (multiply by 1,000).
Worked Example
- You have a 5mg BPC-157 vial = 5,000mcg total
- You add 2mL of BAC water
- Concentration = 5,000mcg ÷ 2mL = 2,500mcg/mL
- You want a 500mcg dose
- Units to draw = (500 ÷ 2,500) × 100 = 20 units on your insulin syringe
That gives you 10 doses of 500mcg from one 5mg vial (with 2mL BAC water).
Or skip the math entirely. Use our Peptide Reconstitution Calculator to get the exact number of units for any vial size, BAC water volume, and target dose combination.
Common Vial Sizes and Dose Charts
5mg Vial + 2mL BAC Water (2,500 mcg/mL)
| Target Dose | Units to Draw | Doses Per Vial |
|---|---|---|
| 250 mcg | 10 units | 20 doses |
| 300 mcg | 12 units | ~16 doses |
| 500 mcg | 20 units | 10 doses |
| 750 mcg | 30 units | ~6 doses |
| 1,000 mcg | 40 units | 5 doses |
10mg Vial + 2mL BAC Water (5,000 mcg/mL)
| Target Dose | Units to Draw | Doses Per Vial |
|---|---|---|
| 250 mcg | 5 units | 40 doses |
| 300 mcg | 6 units | ~33 doses |
| 500 mcg | 10 units | 20 doses |
| 750 mcg | 15 units | ~13 doses |
| 1,000 mcg | 20 units | 10 doses |
15mg Vial + 3mL BAC Water (5,000 mcg/mL)
| Target Dose | Units to Draw | Doses Per Vial |
|---|---|---|
| 250 mcg | 5 units | 60 doses |
| 300 mcg | 6 units | 50 doses |
| 500 mcg | 10 units | 30 doses |
| 750 mcg | 15 units | 20 doses |
| 1,000 mcg | 20 units | 15 doses |
Pro Tip
With 10mg and 15mg vials at the common 250mcg dose, you’re drawing only 5 units, which is hard to read accurately on a standard insulin syringe. If you’re dosing at the lower end, consider adding more BAC water (e.g., 3mL to a 10mg vial) to get a less concentrated solution with larger draw volumes. Or use a 0.5mL (50-unit) syringe with finer graduation marks. See our insulin syringe reading guide for detailed instructions on accurate measurement.
Using the BPC-157 Reconstitution Calculator
Instead of doing the math manually, use our free Peptide Reconstitution Calculator:
- Select “BPC-157” as the compound
- Enter your vial size (5mg, 10mg, or 15mg)
- Enter the amount of BAC water you added (in mL)
- Enter your target dose in mcg (e.g., 250 or 500)
- The calculator shows exactly how many units to draw on your insulin syringe
- It also shows total doses per vial so you can plan your cycle supply
The calculator supports all common peptides, including TB-500, GHK-Cu, and more. You can save your calculations and track your doses over time in the Regimen app.
BPC-157 Dosing Protocols
Unlike GLP-1 compounds, BPC-157 does not require titration. You start at your target dose from day one. The dose you choose depends on what you’re targeting.
Targeted Injury Recovery (Tendon, Ligament, Muscle)
| Parameter | Protocol |
|---|---|
| Dose | 250-500mcg per injection |
| Frequency | 2x daily (AM and PM) |
| Total daily dose | 500-1,000mcg |
| Duration | 4-8 weeks |
| Injection site | SubQ as close to the injury as practical |
This is the most common BPC-157 protocol. The twice-daily dosing compensates for BPC-157’s short half-life (~4 hours) and maintains more consistent tissue-level exposure throughout the day.
General Healing / Gut Health
| Parameter | Protocol |
|---|---|
| Dose | 250-500mcg per injection |
| Frequency | 1-2x daily |
| Total daily dose | 250-500mcg |
| Duration | 4-6 weeks |
| Injection site | SubQ in the abdomen |
For gut-related applications (leaky gut, IBS symptom management, NSAID-related GI damage), abdominal subcutaneous injection is preferred. Some users report benefit from oral BPC-157 for gut-specific applications, though injectable remains the standard research route.
Maintenance / Preventive
| Parameter | Protocol |
|---|---|
| Dose | 250mcg |
| Frequency | 1x daily |
| Duration | 4 weeks on / 2 weeks off |
| Injection site | SubQ in the abdomen or deltoid area |
Lower-dose maintenance protocols are used between intensive cycles or for general tissue support. This is not a well-established protocol in the literature. It comes from community practice.
Community Insight
The twice-daily protocol for injury recovery is widely regarded as more effective than once-daily dosing at a higher amount. BPC-157’s half-life is roughly 4 hours, so splitting your daily dose into two injections 8-12 hours apart keeps levels more stable. Most experienced users report noticeable differences in healing speed with the 2x/day approach.
Stacking BPC-157 with TB-500
BPC-157 is frequently stacked with TB-500 (Thymosin Beta-4) for synergistic recovery effects. The two peptides work through different mechanisms. BPC-157 primarily promotes angiogenesis and tendon/ligament repair, while TB-500 supports broader tissue repair and reduces inflammation through different pathways.
| Peptide | Dose | Frequency | Mechanism Focus |
|---|---|---|---|
| BPC-157 | 250-500mcg | 2x daily | Tendon/ligament repair, angiogenesis, GI protection |
| TB-500 | 2-5mg | 2x/week (loading) → 1x/week (maintenance) | Cell migration, inflammation reduction, tissue remodeling |
TB-500 has a much longer half-life than BPC-157, so it only needs to be injected 1-2 times per week. They can be injected at the same time but should be drawn into separate syringes unless you’re using a pre-blended product.
For the full breakdown of how these two peptides complement each other, dosing timelines, and cycle structures, see our BPC-157 + TB-500 Recovery Stack Guide.
If you’re using a pre-mixed BPC-157/TB-500 blend, use our Peptide Blend Calculator to calculate per-peptide dosing from a single vial.
Pro Tip
When stacking, keep each peptide in its own vial and draw them separately. Mixing two reconstituted peptides into one syringe is generally fine for immediate injection, but storing mixed peptides in the same vial long-term can affect stability. Pre-blended products from compounding sources are formulated for co-storage. DIY mixing is not the same thing.
Storage After Reconstitution
| State | Temperature | Shelf Life |
|---|---|---|
| Unreconstituted (powder) | Room temperature or refrigerated | Per manufacturer expiration (typically 12-24 months) |
| Unreconstituted (powder) | Frozen (-20°C) | Extended stability (years) |
| Reconstituted (with BAC water) | Refrigerated (36-46°F / 2-8°C) | Up to 28 days |
| Reconstituted | Room temperature | Not recommended. Significant degradation within hours |
Never freeze reconstituted BPC-157. Keep the vial upright in the refrigerator, away from direct light. If the solution develops cloudiness, particles, or discoloration after storage, discard it.
For a full breakdown of peptide storage best practices, temperature ranges, and travel tips, see our Peptide Storage Guide.
Important
BPC-157 is more temperature-sensitive than many peptides. If your vial arrives warm or was sitting on a hot porch for hours, the peptide may already be partially degraded before you even reconstitute it. Always check that vendors ship with cold packs and that the powder cake inside the vial looks intact, not melted, discolored, or stuck to the sides.
Cycling: How Long to Run BPC-157
BPC-157 is typically run in defined cycles rather than continuously. Standard practice:
| Phase | Duration | Notes |
|---|---|---|
| Active cycle | 4-8 weeks | At full dose for targeted recovery |
| Off period | 2-4 weeks minimum | Allow the body to normalize |
| Extended use | Up to 12 weeks reported | For severe or chronic injuries. Less common |
Most users run one or two 4-8 week cycles for a specific injury and then stop. There’s no established long-term safety data for continuous BPC-157 use in humans, so cycling off is the consensus approach in the community.
For more on peptide cycling structures, on/off ratios, and how to plan multi-peptide cycles, see our Peptide Cycling Guide.
Community Insight
A common community approach for stubborn injuries: run BPC-157 at 500mcg 2x/day for 4 weeks, take 2 weeks off, then assess. If the injury has improved but isn’t fully resolved, run a second 4-week cycle. Many users report that the first cycle does the heavy lifting. The second cycle is for finishing the job.
Side Effects
BPC-157 has a relatively mild side-effect profile compared to many other peptides. Reported side effects are uncommon but include:
| Side Effect | Frequency | Notes |
|---|---|---|
| Injection site redness/irritation | Occasional | Mild; resolves within hours. Rotate sites. |
| Nausea | Rare | More common at higher doses (>750mcg) |
| Dizziness / lightheadedness | Rare | Usually transient; first few days of use |
| Headache | Rare | May relate to increased blood flow / angiogenesis |
| Fatigue | Rare | Typically first week only |
| Changes in blood pressure | Very rare | Monitor if you have existing BP issues |
Important
BPC-157 promotes angiogenesis, the growth of new blood vessels. This is beneficial for injury healing, but there is a theoretical concern that it could support the growth of existing tumors that depend on blood supply. If you have a history of cancer or active tumors, consult an oncologist before using BPC-157. This is not a proven risk in humans, but the mechanism warrants caution.
Track your side effects alongside your doses in the Regimen app to identify patterns and adjust your protocol accordingly.
Common BPC-157 Reconstitution Mistakes to Avoid
| Mistake | Why It Matters |
|---|---|
| Shaking the vial vigorously | BPC-157 is a fragile peptide. Shaking can denature it and reduce healing benefits |
| Using sterile water instead of BAC water | BAC water contains a preservative that prevents bacterial growth across multiple uses |
| Drawing from the vial with the same needle you injected with | Introduces bacteria into the vial. Always use a fresh needle to draw |
| Not swabbing the vial top before each draw | Even refrigerated vials can develop surface contamination |
| Forgetting to note the reconstitution date | BPC-157 potency degrades. Most protocols recommend use within 21-28 days |
Frequently Asked Questions
How much BAC water should I add to my BPC-157 vial?
For a 5mg vial, 1-2mL is standard. For 10mg, 2mL works well. For 15mg, 2-3mL. The amount doesn’t change the total peptide, only the concentration.
Can I inject BPC-157 anywhere, or does it need to be near the injury?
Both systemic and local injections are used. For targeted injuries, injecting near the site is most common. For gut healing, abdominal subcutaneous injection is standard.
Should I take BPC-157 once or twice a day?
For active injury recovery, twice daily is preferred due to BPC-157’s short ~4-hour half-life. For maintenance or gut health, once daily is often sufficient.
Do I need to cycle off BPC-157?
Yes. Standard practice is 4-8 weeks on, then 2-4 weeks off. There’s no established long-term safety data for continuous use.
Can I mix BPC-157 and TB-500 in the same syringe?
You can draw both into the same syringe for immediate injection. Do not store them mixed in the same vial long-term.
How do I know if my BPC-157 has gone bad?
Look for cloudiness, floating particles, or color changes. A properly reconstituted solution should be completely clear and colorless.
Is BPC-157 taken orally or injected?
Injectable is the standard research route. Some users take it orally for gut-specific applications, though bioavailability is significantly lower orally for systemic effects.
Disclaimer: This article is for educational purposes only and is not medical advice. BPC-157 is a research peptide and is not FDA-approved for human use. Always consult with a healthcare provider before starting any peptide protocol. Individual responses vary.
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What’s the difference between 5mg, 10mg, and 15mg vials?
Only the total amount of peptide in the vial. A 10mg vial has twice as much BPC-157 as a 5mg vial, which means more doses per vial. The peptide itself is identical. Larger vials are more cost-effective per dose but require the solution to last longer after reconstitution. Make sure you’ll use it within 28 days.
