Key Takeaway
Learn how to reconstitute MOTS-c peptide step by step. We cover bacteriostatic water ratios, mixing technique, dosing calculations, and proper storage.
Reconstituting MOTS-c correctly is important for accurate dosing and preserving the peptide's integrity. MOTS-c typically arrives as a lyophilized (freeze-dried) powder in a sealed vial. Before you can inject it, you need to add bacteriostatic water to dissolve the powder into a solution. The process takes about 5 minutes and requires basic supplies you likely already have if you use injectable peptides .
What You Need
- MOTS-c lyophilized vial (commonly 5 mg or 10 mg)
- Bacteriostatic water (BAC water) with 0.9% benzyl alcohol preservative
- Insulin syringe (1 mL / 100 units) for drawing and injecting
- Alcohol swabs for sterilizing vial tops
- A clean, flat surface to work on
Important: Use bacteriostatic water, not sterile water or saline. Bacteriostatic water contains benzyl alcohol as a preservative, which keeps the reconstituted solution safe for multi-dose use over several weeks. Sterile water lacks this preservative and should only be used for single-dose preparations .
Step-by-Step Reconstitution
Step 1[1]: Gather and Inspect
Remove your MOTS-c vial from storage. Check the powder inside. It should appear as a white or off-white cake or powder at the bottom of the vial. If the powder appears discolored, wet, or has an unusual odor after opening, don't use it.
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| Category | Clinical Interest Score | Detail |
|---|---|---|
| BPC-157 | 88 | Tissue repair and gut healing |
| TB-500 | 82 | Injury recovery |
| Sermorelin | 78 | Growth hormone support |
| Ipamorelin | 75 | Anti-aging and recovery |
| GHK-Cu | 70 | Skin and tissue repair |
Step 2: Clean the Vial Tops
Swab the rubber stopper of both the MOTS-c vial and the bacteriostatic water vial with an alcohol pad. Let them air dry for 10 to 15 seconds. This prevents bacteria from entering when you insert the needle.
Step 3: Draw the Bacteriostatic Water
Using a clean insulin syringe, draw your desired amount of bacteriostatic water. Common reconstitution ratios:
- 10 mg vial + 2 mL BAC water = 5 mg per mL (most common, easiest math)
- 10 mg vial + 1 mL BAC water = 10 mg per mL (more concentrated, smaller injection volume)
- 5 mg vial + 1 mL BAC water = 5 mg per mL
For a 2 mL draw, you'll need to fill the 1 mL syringe twice, adding the water in two passes.
Step 4: Add Water to the Peptide Vial
Insert the syringe needle through the rubber stopper of the MOTS-c vial. Angle the needle so it points at the glass wall of the vial, not directly at the powder. Slowly depress the plunger, letting the water drip down the inside wall of the vial. This gentle approach prevents damage to the peptide's molecular structure.
Don't squirt water directly onto the powder. Don't shake the vial.
Step 5: Let It Dissolve
After adding the water, set the vial on a flat surface. The powder will begin dissolving on its own. You can gently roll the vial between your palms to help it along, but never shake it. Shaking can denature the peptide, reducing its effectiveness.
Complete dissolution typically takes 2 to 5 minutes. The resulting solution should be clear and colorless. If it appears cloudy or contains visible particles after 10 minutes, something may be wrong with the peptide. Don't use a solution that doesn't fully clear.
Step 6: Label and Store
Write the reconstitution date, contents, and concentration on the vial or on a small piece of tape attached to it. Store the reconstituted vial in the refrigerator at 36 to 46 degrees Fahrenheit (2 to 8 degrees Celsius). Keep it upright and away from light.
Dosing Math
Once reconstituted, you need to know how much solution to draw for your desired dose. Using the common 10 mg vial with 2 mL BAC water (5 mg/mL):
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Start Free Assessment →- 2.5 mg dose = 0.5 mL = 50 units on an insulin syringe
- 5 mg dose = 1.0 mL = 100 units on an insulin syringe
- 10 mg dose = 2.0 mL = full vial (you'll need two syringe draws)
Using the 10 mg vial with 1 mL BAC water (10 mg/mL):
- 2.5 mg dose = 0.25 mL = 25 units
- 5 mg dose = 0.5 mL = 50 units
- 10 mg dose = 1.0 mL = 100 units
Storage Guidelines
- Unreconstituted (lyophilized): Store in the freezer or refrigerator. Stable for months in the freezer, weeks to months in the refrigerator
- Reconstituted: Refrigerate immediately. Use within 28 days. Don't freeze reconstituted peptide, as this can damage the solution
- During travel: Use an insulated cooler bag with ice packs. Avoid leaving reconstituted peptide at room temperature for extended periods
Medical References
- Wilding JPH, Batterham RL, Calanna S, et al. Once-Weekly Semaglutide in Adults with Overweight or Obesity. N Engl J Med. 2021;384(11):989-1002. [PubMed | ClinicalTrials.gov | DOI]
- Davies M, Færch L, Jeppesen OK, et al. Semaglutide 2.4 mg once a week in adults with overweight or obesity, and type 2 diabetes (STEP 2). Lancet. 2021;397(10278):971-984. [PubMed | ClinicalTrials.gov | DOI]
- Wadden TA, Bailey TS, Billings LK, et al. Effect of Subcutaneous Semaglutide vs Placebo as an Adjunct to Intensive Behavioral Therapy on Body Weight in Adults With Overweight or Obesity (STEP 3). JAMA. 2021;325(14):1403-1413. [PubMed | ClinicalTrials.gov | DOI]
- Rubino D, Abrahamsson N, Davies M, et al. Effect of Continued Weekly Subcutaneous Semaglutide vs Placebo on Weight Loss Maintenance in Adults With Overweight or Obesity (STEP 4). JAMA. 2021;325(14):1414-1425. [PubMed | ClinicalTrials.gov | DOI]
- Garvey WT, Batterham RL, Bhatt DL, et al. Two-year effects of semaglutide in adults with overweight or obesity (STEP 5). Nat Med. 2022;28(10):2083-2091. [PubMed | ClinicalTrials.gov | DOI]
Frequently Asked Questions
How do you reconstitute MOTS-c?
Add bacteriostatic water to the lyophilized MOTS-c vial by slowly dripping it down the inside glass wall. Don't shake. A common ratio is 2 mL of bacteriostatic water per 10 mg vial, giving a concentration of 5 mg per mL. Let the powder dissolve fully (2 to 5 minutes), then refrigerate.
How long does reconstituted MOTS-c last?
Reconstituted MOTS-c should be used within 28 days when stored in the refrigerator at 36 to 46 degrees Fahrenheit. Using bacteriostatic water (not sterile water) is important for multi-dose use, as the benzyl alcohol preservative prevents bacterial growth.
Can I use sterile water instead of bacteriostatic water?
Sterile water can be used for single-dose reconstitution only. For multi-dose vials, bacteriostatic water is necessary because it contains a preservative that prevents bacterial contamination with repeated needle insertions.
What if I shake the vial accidentally?
A brief accidental shake is unlikely to destroy the peptide entirely, but vigorous or repeated shaking can cause denaturation. If the solution remains clear after settling, it's likely fine. If it appears foamy or doesn't clear, the peptide may be compromised.
Can I pre-load syringes with MOTS-c?
Some users pre-load insulin syringes for convenience. This is acceptable for short-term storage (a few days) if the syringes are capped, kept refrigerated, and handled with clean technique. For periods longer than a few days, draw from the vial fresh for each injection.
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