How to Reconstitute MOTS-C: Step-by-Step Guide (2026)
MOTS-C reconstitution guide: 2mL BAC water into a 10mg vial = 20 units per 5mg dose. Dilution charts, storage, and mistakes to avoid.
How to Reconstitute MOTS-C
MOTS-C is a mitochondrial-derived peptide — a 16-amino-acid signaling molecule encoded in mitochondrial DNA that regulates metabolic homeostasis through the AMPK pathway. It arrives as a lyophilized powder and needs to be reconstituted before use.
The process is the same as any other peptide, but MOTS-C has a unique consideration: the doses are relatively large (5-10mg) compared to peptides like BPC-157 or semaglutide, which means your dilution choice matters more for injection volume.
What You Need
Before you start, gather everything:
- MOTS-C lyophilized vial (typically 5mg or 10mg)
- Bacteriostatic water (BAC water) — not sterile water, not saline
- Insulin syringes — 1mL (100 unit), 29-31 gauge
- Alcohol swabs — for cleaning vial tops
- A clean, flat workspace
Why bacteriostatic water? It contains 0.9% benzyl alcohol that prevents bacteria from growing in your solution. Regular sterile water has no preservative, so the vial must be used within 24 hours. If you're pulling multiple doses from a single 10mg vial, BAC water is essential — it gives you up to 28 days refrigerated.
Step-by-Step Reconstitution
Step 1: Clean Everything
Wipe the tops of both vials (MOTS-C and BAC water) with alcohol swabs. Let them air dry for 10 seconds. This prevents contamination — skip it at your own risk.
Step 2: Draw Your Bacteriostatic Water
Using a fresh insulin syringe, draw your desired amount of BAC water. The amount you add determines your concentration (see the dilution charts below).
For MOTS-C, the ideal water amount depends on your vial size and dose. Because doses are large (5-10mg), you want to balance between accurate measurement and reasonable injection volume. For a 10mg vial dosed at 5mg, 2mL of water gives you 5,000mcg/mL — meaning each 5mg dose is 100 units (1mL), and you get exactly 2 doses per vial.
Step 3: Add Water to the Peptide Vial
Insert the needle into the MOTS-C vial at an angle, aiming at the glass wall — not directly at the powder. Let the water trickle down the side of the vial gently.
Do not squirt water directly onto the powder. Peptides are fragile. Aggressive mixing can damage the molecular structure and reduce potency.
Step 4: Let It Dissolve
Gently swirl the vial with a slow rotating motion. Do not shake it. The powder should dissolve within 1-2 minutes into a perfectly clear, colorless solution.
If particles remain after 5 minutes of gentle swirling, the peptide may be degraded. A properly manufactured MOTS-C dissolves easily.
Step 5: Store Correctly
Refrigerate immediately at 36-46F (2-8C). The reconstituted solution is stable for up to 28 days with bacteriostatic water.
Dilution Charts
5mg Vial
| BAC Water Added | Concentration | 5mg Dose (full vial) | 2.5mg Dose |
|---|---|---|---|
| 0.5mL | 10,000mcg/mL | 50 units (0.5mL) | 25 units (0.25mL) |
| 1mLRecommended | 5,000mcg/mL | 100 units (1mL) | 50 units (0.5mL) |
| 2mL | 2,500mcg/mL | 200 units (2mL) | 100 units (1mL) |
10mg Vial
| BAC Water Added | Concentration | 5mg Dose | 10mg Dose |
|---|---|---|---|
| 1mL | 10,000mcg/mL | 50 units (0.5mL) | 100 units (1mL) |
| 2mLRecommended | 5,000mcg/mL | 100 units (1mL) | 200 units (2mL) |
| 3mL | 3,333mcg/mL | 150 units (1.5mL) | 300 units (3mL) |
Why 2mL for 10mg vials? It gives you exactly 2 doses at 5mg each, with each dose being a full 1mL (100 units) — easy to draw, no math mistakes. For 5mg vials used as single-dose, 1mL keeps the injection volume manageable.
The Math (So You Can Do It Yourself)
Here's the formula for any vial size and any amount of water:
Concentration = Peptide Amount (mcg) / Water Added (mL)
Then to find your injection volume:
Units to inject = Desired Dose (mcg) / Concentration (mcg/mL) x 100
Example: 10,000mcg vial + 2mL water = 5,000mcg/mL. For a 5mg (5,000mcg) dose: 5,000 / 5,000 x 100 = 100 units (1mL).
For a smaller dose: 10,000mcg vial + 2mL = 5,000mcg/mL. For a 10mg dose: 10,000 / 5,000 x 100 = 200 units — that exceeds a single syringe. Either use less water (1mL gives you 100 units for 10mg) or split into two injection sites.
Don't want to do math? Use our Reconstitution Calculator — plug in your vial size, water amount, and desired dose, and it does the rest.
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Common Mistakes
Shaking the Vial
Peptides are proteins. Shaking creates foam, which means air bubbles trapped against peptide molecules. This can denature (destroy) the peptide at the air-liquid interface. Always swirl gently.
Adding Too Much Water
This is the opposite problem from most peptides. Because MOTS-C doses are large (5-10mg), adding too much water means huge injection volumes. Adding 3mL to a 5mg vial means a 5mg dose requires the entire 3mL — far too much for a single subcutaneous injection. Keep it at 1-2mL.
Not Accounting for Injection Volume
A 1mL subcutaneous injection is already on the larger side. If your dose calculation comes out above 1mL, split it into two injection sites or use less reconstitution water. Injecting more than 1mL in a single subcutaneous site can cause discomfort and poor absorption.
Leaving It at Room Temperature
Reconstituted MOTS-C degrades rapidly above refrigerator temperature. Every hour at room temperature reduces potency. Pull the vial out, draw your dose, put it back. Don't leave it on the counter while you prep.
Reusing Needles
Each puncture through the rubber stopper dulls the needle and increases contamination risk. Fresh syringe every time — they cost pennies.
Freezing Reconstituted Peptide
Freezing a liquid peptide solution creates ice crystals that can shear the peptide bonds apart. Only freeze lyophilized (powder) peptides. Once reconstituted, refrigerate — never freeze.
How Many Doses Per Vial?
This depends on your dose and frequency:
5mg vial:
- At 5mg 3x/week = less than 1 week (single dose per vial)
- At 5mg 2x/week = less than 1 week
10mg vial:
- At 5mg 3x/week = ~2.3 days (2 doses per vial)
- At 5mg 2x/week = 3.5 days (2 doses per vial)
- At 10mg 2x/week = 1 dose per vial
MOTS-C is consumed faster than most peptides due to the higher per-dose amounts. Budget accordingly — a 4-week protocol at 5mg three times weekly requires 12 vials of 5mg or 6 vials of 10mg.
Storage Quick Reference
| State | Temperature | Shelf Life |
|---|---|---|
| Lyophilized (powder) | Room temp | 6-12 months |
| Lyophilized (powder) | Refrigerated | 2+ years |
| Lyophilized (powder) | Frozen (-20C) | 3+ years |
| Reconstituted (BAC water) | Refrigerated | Up to 28 days |
| Reconstituted (sterile water) | Refrigerated | Use within 24 hours |
Pro tip: If you buy multiple vials, keep unopened ones in the freezer and only reconstitute what you'll use within 3-4 weeks. With MOTS-C's higher dosing, you'll go through vials quickly — consider reconstituting 2-3 at a time if running a multi-dose weekly protocol.
Related Reading
-
MOTS-c Dosing Guide — protocols, cycles, and administration
-
MOTS-C Bloodwork Guide — what labs to track and optimal ranges
-
BPC-157 Reconstitution Guide — the standard reconstitution reference
-
Semaglutide Reconstitution Guide — mixing guide for GLP-1 agonist
-
Retatrutide Reconstitution Guide — mixing guide for the triple-receptor agonist
-
SS-31 Dosing Guide — another mitochondrial peptide often paired with MOTS-C
References
- Lee, C., et al. (2015). The mitochondrial-derived peptide MOTS-c promotes metabolic homeostasis and reduces obesity and insulin resistance. Cell Metabolism, 21(3), 443-454. PMID:25738459
- Kim, K.H., et al. (2023). Mitochondria-derived peptide MOTS-c: effects and mechanisms related to stress, metabolism and aging. Molecules, 28(3), 1229. PMC9854231
- Reynolds, J.C., et al. (2021). MOTS-c is an exercise-induced mitochondrial-encoded regulator of age-dependent physical decline and muscle homeostasis. Nature Communications, 12, 470. PMC9905433
- USP General Chapter 797: Pharmaceutical Compounding — Sterile Preparations. Storage and beyond-use dating guidelines for reconstituted peptides.
This guide is for educational and informational purposes only. It is not medical advice. MOTS-C is sold as a research compound and is not FDA-approved for human use. Reconstituting and self-administering peptides carries inherent risks including infection, contamination, and dosing errors. Always use proper sterile technique. Consult a qualified healthcare provider before starting any peptide protocol. The Peptide Catalog is not responsible for any adverse effects resulting from the use or misuse of information presented here.