MOTS-c Reconstitution: 5mg, 10mg & 40mg Charts

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 the dilution choice matters more for injection volume.

Research-context information only. MOTS-c is a research peptide. Protocols, doses, and reactions reported below come from published research and self-reported community sources. This article reports what has been documented, not what should be done. Consult a licensed physician for personal medical decisions.

New to bacteriostatic water? Start with what it is, how much to use per vial, and how long it lasts — or see the full Bacteriostatic Water Guide.

What You Need

Documented protocols call for the following:

• MOTS-C lyophilized vial (typically 5mg, 10mg, or 40mg)
• 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 the solution. Regular sterile water has no preservative, so the vial must be used within 24 hours. For pulling multiple doses from a single 10mg vial, BAC water is essential — it allows up to 28 days refrigerated.

Step-by-Step Reconstitution

Step 1: Clean Everything

Protocols describe wiping the tops of both vials (MOTS-C and BAC water) with alcohol swabs, then letting them air dry for 10 seconds. This prevents contamination — a step community resources flag as essential.

Step 2: Drawing the Bacteriostatic Water

Protocols describe using a fresh insulin syringe to draw the desired amount of BAC water. The amount added determines the concentration (see the dilution charts below).

For MOTS-C, the commonly described water amount depends on vial size and dose. Because doses are large (5-10mg), the balance is between accurate measurement and reasonable injection volume. For a 10mg vial dosed at 5mg, 2mL of water gives 5,000mcg/mL — meaning each 5mg dose is 100 units (1mL), and the vial yields exactly 2 doses.

Step 3: Add Water to the Peptide Vial

Protocols describe inserting the needle into the MOTS-C vial at an angle, aiming at the glass wall — not directly at the powder — and letting the water trickle down the side of the vial gently.

Protocols describe avoiding a direct stream onto the powder. Peptides are fragile. Aggressive mixing can damage the molecular structure and reduce potency.

Step 4: Let It Dissolve

Protocols describe swirling the vial gently with a slow rotating motion rather than shaking it. The powder should dissolve within 1-2 minutes into a perfectly clear, colorless solution.

Community resources describe persistent particles after several minutes of gentle swirling as a sign of degraded product. A properly manufactured MOTS-C dissolves easily.

Step 5: Store Correctly

Protocols describe refrigerating reconstituted vials immediately at 36-46F (2-8C). The reconstituted solution is stable for up to 28 days with bacteriostatic water.

Dilution Charts

The charts below show dilution arithmetic as documented in community reconstitution resources; concentrations and volumes are illustrative, not a recommendation.

Why 2mL for 10mg vials? Community resources commonly describe 2mL because it yields exactly 2 doses at 5mg each, with each dose being a full 1mL (100 units) — easy to draw, with little room for math mistakes. For 5mg vials used as single-dose, 1mL keeps the injection volume manageable.

Why 2mL for 40mg vials? Community resources commonly describe 2mL because at 20mg/mL, a 5mg dose is a small 0.25mL (25 units) draw, and the vial yields 8 doses at 5mg — a full 4 weeks at twice weekly, which lines up with the 28-day refrigerated shelf life of BAC-water reconstitution. With only 1mL, each draw becomes very small (12.5 units for 5mg), where a half-unit reading error becomes a meaningful dose error.

The Math (How Dilution Is Calculated)

Community calculators use the following formula for any vial size and any amount of water:

Concentration = Peptide Amount (mcg) / Water Added (mL)

Then to find the 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).

40mg vial example: 40,000mcg + 2mL water = 20,000mcg/mL. For a 5mg dose: 5,000 / 20,000 x 100 = 25 units (0.25mL). For a 10mg dose: 10,000 / 20,000 x 100 = 50 units (0.5mL).

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. Protocols describe either using less water (1mL gives 100 units for 10mg) or splitting into two injection sites.

A Reconstitution Calculator is available for those who prefer to input vial size and water amount to retrieve the unit count directly.

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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. Protocols describe swirling gently rather than shaking.

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. Documented protocols keep it at 1-2mL.

Not Accounting for Injection Volume

A 1mL subcutaneous injection is already on the larger side. When a dose calculation comes out above 1mL, protocols describe splitting it into two injection sites or using 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. Community sources describe potency loss with time at room temperature. Protocols describe pulling the vial out, drawing the dose, and returning it to the refrigerator rather than leaving it on the counter during prep.

Reusing Needles

Each puncture through the rubber stopper dulls the needle and increases contamination risk. Protocols describe a 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. Protocols describe freezing only lyophilized (powder) peptides. Once reconstituted, the solution is refrigerated — never frozen.

How Many Doses Per Vial?

This depends on the 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

40mg vial:

• At 5mg 3x/week = ~2.7 weeks (8 doses per vial)
• At 5mg 2x/week = 4 weeks (8 doses per vial)
• At 10mg 2x/week = 2 weeks (4 doses per vial)

MOTS-C is consumed faster than most peptides due to the higher per-dose amounts. A community-described 4-week protocol at 5mg three times weekly requires 12 vials of 5mg, 6 vials of 10mg, or 2 vials of 40mg — one reason 40mg vials have become a common format for multi-week protocols.

Storage Quick Reference

Estimates based on community-reported and manufacturer-stated figures; actual shelf life varies with peptide purity, packaging integrity, and storage conditions.

Community protocols for multi-vial storage describe keeping unopened vials frozen and reconstituting only what will be used within 3-4 weeks. With MOTS-C's higher per-dose amounts, some community sources describe reconstituting 2-3 vials at a time when running a multi-dose weekly protocol.

Related Reading

• MOTS-c Side Effects: Trials and User Reports — adverse event profile from clinical trials and community reports

• 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

• Calculate Your MOTS-c Cycle Cost — estimate vials needed and total cost for your protocol

References

1. 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
2. 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
3. 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
4. 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.