Pre-mixed peptide blends contain 2-4 compounds in a single vial - a single syringe draw delivers multiple peptides simultaneously. Enter the milligrams of each peptide in your vial, the total BAC water, and the dose you want for any one component - and this calculator shows the exact syringe draw plus how much of every other peptide you receive. Not sure how much BAC water to add? Start with the BAC water calculator. For single-peptide vials, use the standard peptide reconstitution calculator.
Enter amounts for all peptides, BAC water volume, and target dose to see results.
A blended peptide vial contains multiple compounds pre-mixed at fixed milligram ratios. When you reconstitute the vial with bacteriostatic water and draw a volume, you get a proportional dose of every peptide in that draw - you cannot draw one compound without the others.
The calculator performs 4 operations. First, it calculates the concentration of each peptide by dividing its individual milligram amount by the total BAC water volume. Second, it determines the draw volume based on your target dose for the selected peptide. Third, it calculates the dose of every other peptide in that same draw. Fourth, it determines doses per vial - limited by whichever peptide runs out first.
With a single-peptide vial, you have 3 degrees of freedom: vial size, BAC water volume, and dose. With a blend, the vial's peptide ratios are fixed at manufacturing. You can only hit an exact target dose for one peptide per draw - the other doses are determined by the fixed ratio. If the ratio doesn't match your protocol, you need separate vials of the individual peptides, not a blend.
The most popular multi-peptide blend. Combines a copper peptide for skin and collagen remodelling with two tissue repair compounds (BPC-157 and TB-500). Standard vial: 10 mg GHK-Cu + 5 mg BPC-157 + 2 mg TB-500. See the BPC-157 + TB-500 stack guide.
GLOW plus KPV, an anti-inflammatory tripeptide. Adds immune modulation to the repair + remodelling stack. Standard: 10 mg GHK-Cu + 5 mg BPC-157 + 2 mg TB-500 + 5 mg KPV.
Growth hormone secretagogue stack. CJC-1295 (no DAC) provides sustained GHRH signalling while ipamorelin triggers a ghrelin-mimetic GH pulse. Standard: 2 mg + 2 mg or 5 mg + 5 mg. For a dedicated calculator, see the CJC-1295/Ipamorelin calculator.
The core tissue repair stack. BPC-157 acts locally at injury sites while TB-500 acts systemically. Standard: 5 mg + 5 mg. See the BPC-157 + TB-500 calculator and the full Wolverine stack guide.
Growth hormone stack targeting visceral fat and body composition. Tesamorelin is a GHRH analogue with specific evidence for visceral adipose reduction. Standard: 4 mg + 4 mg.
| Factor | Blend Vial | Separate Vials |
|---|---|---|
| Convenience | 1 reconstitution, 1 injection | Multiple reconstitutions, multiple injections |
| Dose flexibility | Fixed ratio - cannot adjust independently | Full control over each dose |
| Cost | Often cheaper than buying components separately | More expensive, but no waste from ratio mismatch |
| Quality verification | Harder to test - HPLC must distinguish multiple peaks | Each peptide testable individually |
| Best for | Established protocols with standard ratios | Custom protocols, dose titration, or when purity verification matters |
For quality verification of blended vials, HPLC testing must resolve multiple peptide peaks - which is more complex than single-peptide testing. Check lab test results on Peptigrity to see which vendors have independent test data for their blend products.
| Tool | What It Does |
|---|---|
| Peptide Reconstitution Calculator | Concentration, syringe draw, and doses per vial for single-peptide vials |
| Cost-per-Dose Calculator | Compare peptide costs across vendors and vial sizes |
| BAC Water Calculator | Determine optimal BAC water volume for your vial and dose |
| Purity Comparison Tool | Compare independent lab-tested purity across brands |
Divide each peptide's milligram amount by the total BAC water volume to get its concentration in mg/mL. Multiply the concentration by your draw volume (in mL) to get the dose in mg. Convert to mcg by multiplying by 1,000. Example: a GLOW vial (10 mg GHK-Cu + 5 mg BPC-157 + 2 mg TB-500) in 3 mL BAC water gives concentrations of 3.33, 1.67, and 0.67 mg/mL. A 0.15 mL draw delivers 500 mcg GHK-Cu, 250 mcg BPC-157, and 100 mcg TB-500 simultaneously.
No. The ratio is fixed by the milligram amounts in the vial. Once reconstituted, every draw delivers all compounds in proportion. If you need a different ratio - for example, more BPC-157 relative to TB-500 - you need separate single-peptide vials. Use the standard peptide reconstitution calculator for individual vial dosing.
The vial delivers useful doses only until the first peptide is exhausted. After that, remaining peptide content in the other compounds is effectively wasted - the blend ratio no longer matches the intended protocol. The calculator shows which peptide is the limiting factor and how many full doses the vial provides.
Use the same principle as single-peptide reconstitution: more water means lower concentration and easier measurement of small doses, but larger injection volumes. For most blends, 2-3 mL provides a practical balance. The BAC water calculator can help determine the optimal volume.
Not necessarily. Blends introduce manufacturing complexity - each compound must be weighed and combined accurately, and HPLC purity testing must resolve multiple peaks. Some vendors publish independent test data for blends; many do not. Check the individual lab test results on Peptigrity for each peptide in the blend to evaluate vendor quality, or use the purity comparison tool to compare tested purity across vendors.
Combining reconstituted peptides from separate vials into a single syringe is technically possible but introduces contamination risk and measurement complexity. Pre-mixed blends from a single vial avoid both issues - the compounds are combined under controlled manufacturing conditions and reconstituted once. For stacking protocols using separate vials, most users administer separate injections at different sites.
The same U-100 insulin syringes used for single-peptide injections: 30-unit (0.3 mL), 50-unit (0.5 mL), or 100-unit (1 mL). Because blend draws often involve larger volumes (due to multiple compounds sharing the BAC water), a 50-unit or 100-unit syringe is typical. If your calculated draw exceeds the syringe capacity, the calculator will flag it - add more BAC water or use a larger syringe.
This calculator is for educational and research purposes only and does not constitute medical advice. Peptides discussed may be investigational compounds not approved by the FDA for human use. Always consult a qualified healthcare provider before using any peptide or research compound. Peptigrity is an independent review platform and does not sell, endorse, or recommend specific products or vendors.