Use this calculator to work out reconstitution volumes and per-injection draw amounts for BPC-157. Enter your vial size, the amount of bacteriostatic water you’ve added, and your target dose — the calculator returns the exact volume in mL, the syringe units to draw to, the concentration of your reconstituted solution, and the number of doses your vial contains.
For research and educational purposes only. This calculator performs volumetric maths on the values you enter; it does not recommend doses or provide medical advice.
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About BPC-157
BPC-157 — short for Body Protection Compound-157 — is a synthetic 15-amino-acid peptide derived from a sequence found in human gastric juice. The “157” refers to its position in the parent BPC molecule’s amino-acid sequence. It is sold internationally as a research-grade compound for laboratory study and is not licensed as a medicine in the UK or any other jurisdiction.
In research literature, BPC-157 has been examined across studies relating to tissue-repair signalling, angiogenesis, and gastrointestinal cell biology. A summary of the published research is collected in the references section at the bottom of this page, with links to PubMed where available. This page does not interpret those studies for human application — readers interested in the science should consult the primary literature.
BPC-157 is unscheduled under the UK Misuse of Drugs Act 1971. It is not approved for human consumption.
Typical reconstitution protocols
For a 5mg BPC-157 vial, the four most common bacteriostatic water volumes give the following concentrations:
| BAC water added | Concentration | Volume per 250mcg dose | Insulin syringe units (U-100) |
|---|---|---|---|
| 1 mL | 5 mg/mL | 0.05 mL | 5 units |
| 2 mL | 2.5 mg/mL | 0.10 mL | 10 units |
| 3 mL | 1.67 mg/mL | 0.15 mL | 15 units |
| 5 mL | 1 mg/mL | 0.25 mL | 25 units |
For a 10mg BPC-157 vial:
| BAC water added | Concentration | Volume per 250mcg dose | Insulin syringe units (U-100) |
|---|---|---|---|
| 1 mL | 10 mg/mL | 0.025 mL | 2.5 units |
| 2 mL | 5 mg/mL | 0.05 mL | 5 units |
| 3 mL | 3.33 mg/mL | 0.075 mL | 7.5 units |
| 5 mL | 2 mg/mL | 0.125 mL | 12.5 units |
A widely-used reconstitution choice is 5mg vial + 2mL BAC water = 2.5 mg/mL concentration, which gives a 10-unit draw for a 250mcg dose. This concentration leaves enough volume for accurate draws on a U-100 insulin syringe and means a single vial provides 20 doses at 250mcg each.
BPC-157 dosing observed in research literature
Reported research-literature dose ranges for BPC-157 in subcutaneous administration to laboratory animals fall predominantly in the 200–500 mcg range per administration. Higher doses up to 1mg per administration appear in some published studies; lower doses around 100mcg also appear.
These figures are reported here for completeness of the research-literature picture and do not constitute a dosage recommendation. Human dosing protocols for BPC-157 are not established and BPC-157 is not licensed for human use.
Half-life and frequency
The serum half-life of BPC-157 in subcutaneous administration is short — typically reported in single-digit hours in animal studies. Daily or twice-daily research administration patterns are most commonly described in the literature for this reason. Short half-life means more frequent administration than weekly compounds like semaglutide, tirzepatide, or retatrutide.
Storage and shelf life
- Lyophilised (powder) vial, unopened: stable refrigerated at 2–8°C for approximately 12–24 months. Long-term storage at -20°C is reported as suitable for periods exceeding 24 months.
- Reconstituted with bacteriostatic water: typically stable refrigerated (2–8°C) for approximately 28 days. The 0.9% benzyl alcohol in BAC water provides bacteriostatic action that gives reconstituted peptides their multi-week shelf life.
- Reconstituted with sterile water (not bacteriostatic water): stable refrigerated for only 24–48 hours. Use BAC water for any reconstitution intended to last more than a single day’s research.
- Freeze-thaw: single freeze-thaw cycles of reconstituted product are tolerated by most research peptides; repeated freeze-thaw cycles are not recommended.
Frequently asked questions
How much bacteriostatic water do I add to a 5mg BPC-157 vial?
Most research protocols use 2 mL or 3 mL of bacteriostatic water for a 5mg vial. 2 mL gives a concentration of 2.5 mg/mL; 3 mL gives 1.67 mg/mL. Either works — 2 mL is more commonly chosen because it gives a tidy 10-unit draw on a U-100 insulin syringe for a 250mcg target dose.
How do I reconstitute a 10mg BPC-157 vial?
Add 2–5 mL of bacteriostatic water depending on your preferred concentration. 2 mL gives 5 mg/mL (small draws), 5 mL gives 2 mg/mL (larger, more accurate draws). For target doses in the 200–500mcg range, 3 mL BAC water on a 10mg vial gives 3.33 mg/mL — a 7.5-unit draw for 250mcg.
How long does BPC-157 last after reconstitution?
Approximately 28 days refrigerated when reconstituted with bacteriostatic water. With sterile water (no preservative), only 24–48 hours.
What syringe should I use for BPC-157?
U-100 insulin syringes (1 mL marked to 100 units) are standard for the small volumes involved in BPC-157 research. A 30-gauge × 8mm needle is typical for subcutaneous research administration in animal studies.
How do I convert mg to mcg for BPC-157 dosing?
1 mg = 1,000 mcg. So a 250mcg dose is 0.25 mg, and a 500mcg dose is 0.5 mg.
Is BPC-157 legal in the UK?
BPC-157 is not a controlled substance under the UK Misuse of Drugs Act 1971. It is sold as a research-grade compound for laboratory use only. It is not licensed by the MHRA as a medicine and is not approved for human consumption.
Can BPC-157 be taken orally?
Oral administration of BPC-157 has been described in published animal-research literature, alongside subcutaneous administration. Some published animal studies report that the compound retains stability through the gastrointestinal tract, attributed to its derivation from a gastric-juice sequence. Subcutaneous administration in animal research remains the more commonly described route. No human administration route is established or licensed.
Does BPC-157 need to be refrigerated?
Yes. Both unopened lyophilised vials and reconstituted solution should be stored refrigerated at 2–8°C. Long-term unopened storage at -20°C is also suitable.
What is the difference between BPC-157 and TB-500?
Both are research peptides studied in tissue-repair contexts. BPC-157 is a 15-amino-acid synthetic peptide derived from a gastric-juice sequence. TB-500 is a synthetic fragment of Thymosin Beta-4, a 43-amino-acid protein. They are commonly stacked together in research protocols.
Can I mix BPC-157 with other peptides in the same vial?
Whether two peptides can share a vial depends on the chemistry — not all pairs are stable together. The Wolverine, GLOW, and KLOW stacks pre-mix BPC-157 with specific other peptides that are reported to be compatible in research literature.
What is the best concentration for BPC-157 reconstitution?
There is no universally “best” concentration — the right choice depends on your target dose and which syringe you’re using. For 250mcg target doses with a U-100 insulin syringe, 2.5 mg/mL (5mg vial + 2mL BAC water) is the most commonly chosen because the 10-unit draw line is easy to read accurately.
Where can I find research-grade BPC-157 in the UK?
This site does not sell peptides. We maintain a partner arrangement with one UK supplier — see the “Where to source” section further down this page. We are not responsible for any third-party supplier’s product quality, regulatory compliance, or customer service. Conduct your own due diligence before any purchase.
Research literature references
The following peer-reviewed publications are commonly cited in BPC-157 research and provide entry points into the published literature. Stackcalc.co.uk does not interpret these studies for human application — they are listed for readers conducting their own research.
- Sikiric P et al., “Stable gastric pentadecapeptide BPC 157: novel therapy in gastrointestinal tract”, Current Pharmaceutical Design — PubMed
- Chang CH et al., “The promoting effect of pentadecapeptide BPC 157 on tendon healing”, Journal of Applied Physiology — PubMed
- Sikiric P et al., “Pentadecapeptide BPC 157 and the central nervous system”, Neural Regeneration Research — PubMed
Related compounds and stacks
- TB-500 — the second compound in the Wolverine recovery stack
- GHK-Cu — adds matrix-research category coverage; the third leg of the GLOW stack
- Wolverine Stack — BPC-157 + TB-500 multi-compound calculator
- GLOW Stack — Wolverine + GHK-Cu
Where to source research-grade BPC-157
For UK readers researching BPC-157, our partner supplier stocks research-grade BPC-157 vials. (Partner link to be added after the affiliate arrangement is signed — held back deliberately pending the partner agreement.)
We do not sell peptides ourselves. The partner link is provided as a convenience to readers who have asked where to source research-grade compounds. Stackcalc.co.uk is not responsible for any third-party supplier’s product quality, regulatory compliance, or customer service — verify the supplier’s terms and conduct your own due diligence before any purchase.
Compliance: Stackcalc.co.uk provides calculator tools and information for research and educational purposes only. We do not sell, supply, or recommend peptides, nootropics, or any other compounds. Content on this site does not constitute medical advice. BPC-157 is not licensed as a medicine in the United Kingdom. Always consult a qualified healthcare professional. Not for human consumption.