P21 5 mg vial price
P21 5 mg vials are listed by 9 vendors. Prices run from $48.00 to $120.00, with a median of $116.00, across the 6 showing an exact in-stock price. Last read Oct 31, 2026. This page also shows how much to draw for the commonly cited doses.
What a 5 mg vial costs
Every vendor we track that lists this exact size, cheapest first. Sort order is price only; affiliate status never changes it.
Median $116.00 a vial, or $23.20 per mg, across the 6 vendors with an exact, in-stock price.
Median unchanged from Oct 31, 2026.Testing checks: outside lab · HPLC purity · mass spec identity · batch COA · lab named
- Ruo BioP-21 5mg$38.00
- $48.00$96.00Sale price, list price not shown
- GenX BioP21 (P021) 5mg$50.00
- Liberty PeptidesP21 5mg$99.00
- Swiss ChemsP21$114.95$120.00
- Swiss ChemsP21 5mg$114.95$120.00
- $116.00
- Core Peptides ResearchP21 (5mg)$116.00
- $120.00
- USA Peptide SciencesP21 (P021) 5mg$120.00
| Vendor | Size | Price | Per mg | Availability | Checked | Link |
|---|---|---|---|---|---|---|
| Ruo Bio P-21 5mg | 5 mg | $38.00 | $7.60 | out of stock | Oct 31, 2026 | View |
| Real Peptides P21 | 5 mg | $48.00$96.00Sale price, list price not shown | $9.60 | in stock | Oct 31, 2026 | View° |
| GenX Bio P21 (P021) 5mg | 5 mg | $50.00 | $10.00 | out of stock | Oct 21, 2026 | View |
| Liberty Peptides P21 5mg | 5 mg | $99.00 | $19.80 | in stock | Oct 31, 2026 | View |
| Swiss Chems P21 | 5 mg | $114.95$120.00 | $22.99 | out of stock | Oct 31, 2026 | View |
| Swiss Chems P21 5mg | 5 mg | $114.95$120.00 | $22.99 | out of stock | Oct 31, 2026 | View |
| Core Peptides P21 | 5 mg | $116.00 | $23.20 | in stock | Oct 31, 2026 | View |
| Core Peptides Research P21 (5mg) | 5 mg | $116.00 | $23.20 | in stock | Oct 24, 2026 | View |
| American Peptides P-21 | 5 mg | $120.00 | $24.00 | in stock | Oct 31, 2026 | View°code PEPTIDEDECODING saves 15% |
| USA Peptide Sciences P21 (P021) 5mg | 5 mg | $120.00 | $24.00 | in stock | Oct 31, 2026 | View |
We earn from these links. It never changes a price or a position here.
- Ruo Bio: Stock not shown, left out of the range
- GenX Bio: Stock not shown, left out of the range
- Swiss Chems: Stock not shown, left out of the range
- Swiss Chems: Stock not shown, left out of the range
Where the price has been
Market median at 5 mg: $22.99 per mg on Sep 1, 2026, $23.20 on Nov 5, 2026, 6 stores comparable today.
| Date | Median per mg | Low per mg | Stores |
|---|---|---|---|
| Nov 5, 2026 | $23.20 | $9.60 | 6 |
| Oct 31, 2026 | $23.20 | $9.60 | 6 |
| Oct 24, 2026 | $23.20 | $9.60 | 6 |
| Oct 22, 2026 | $23.10 | $9.60 | 6 |
| Oct 21, 2026 | $23.10 | $9.60 | 6 |
| Oct 20, 2026 | $23.10 | $9.60 | 6 |
| Oct 19, 2026 | $23.10 | $9.60 | 6 |
| Oct 18, 2026 | $22.99 | $9.60 | 5 |
How to mix a 5 mg vial
Find the column for the amount of water you added to the vial. The number is how far to draw on a U-100 insulin syringe, where 100 units is 1 mL. This is arithmetic on the label, not a recommended dose.
How to read an insulin syringe · How much water to add
| Dose | 1 mL water | 2 mL water | 3 mL water |
|---|---|---|---|
| 250 mcg | 5.0 units 20 doses/vial | 10.0 units 20 doses/vial | 15.0 units 20 doses/vial |
| 750 mcg | 15.0 units 6 doses/vial · 0.50 mg left over | 30.0 units 6 doses/vial · 0.50 mg left over | 45.0 units 6 doses/vial · 0.50 mg left over |
Calculating for
P21
Printed on the vial.
iPeptide Decoding does not recommend a dose. Enter the amount your clinician gave you, or pick a value from the reference range to model.
Same dose, different draw. Pick whichever is easiest to measure.
Multi-vendor comparison is a Pro feature.
Daily is 7. Twice weekly is 2.
Your plan for P21
Nothing left over