How to Reconstitute MOTS-c: Step-by-Step Visual Guide

Materials Needed

Gather the following before beginning: lyophilized MOTS-c vial (commonly 5 mg), bacteriostatic water vial (30 mL), U-100 insulin syringes (1 mL, 29-31 gauge), alcohol prep pads, exam gloves, and a sharps container. MOTS-c (Mitochondrial Open Reading Frame of the 12S rRNA-c) is a 16-amino acid peptide encoded in mitochondrial DNA. Preclinical research has investigated its role in metabolic regulation, insulin sensitivity, and exercise mimicry. It is not FDA-approved for therapeutic use.

Calculating BAC Water Volume

MOTS-c research doses are higher per unit mass than smaller peptides. For a 5 mg vial targeting 5 mg/mL (a high concentration appropriate for small injection volumes): 5 mg ÷ 5 mg/mL = 1 mL BAC water. This yields 5 mg per mL = 5,000 mcg per 100 units on a U-100 syringe.

For a more dilute option of 1 mg/mL: 5 mg ÷ 1 mg/mL = 5 mL BAC water. At 1 mg/mL, a 5 mg dose requires 5 mL (5 full 1 mL syringe fills).

Practical recommendation for typical research: use 2.5 mL BAC water for 5 mg vial, yielding 2 mg/mL. At 2 mg/mL: 5 mg dose = 2.5 mL = 250 units across 2 syringe fills + 50 additional units.

Reconstitution Steps

Step 1 — Swab both vial stoppers with alcohol prep pads. Allow 30 seconds to air-dry before proceeding.

Step 2 — Draw the calculated BAC water volume into the syringe. For 2.5 mL, fill the 1 mL syringe twice (2 x 1 mL) plus one 0.5 mL fill.

Step 3 — Insert the needle into the MOTS-c vial and inject BAC water slowly along the inner glass wall, not directly onto the powder. MOTS-c is a short peptide (16 amino acids) and dissolves readily; do not use excessive pressure.

Step 4 — Gently swirl the vial in slow circles. MOTS-c is a small, soluble peptide and should dissolve quickly — typically within 30–60 seconds. Do not shake. The solution should be clear and colorless.

Step 5 — Inspect the solution: clear, colorless, free of visible particles. Because MOTS-c is a short peptide it is very soluble and rapid dissolution is expected.

Calculating Units on Syringe per Dose

Using 5 mg in 2.5 mL (2 mg/mL):

5 mg dose: 5 mg ÷ 2 mg/mL = 2.5 mL = 250 units across 2 full syringe fills (200 units) + 50 additional units.

10 mg dose (from a 10 mg vial at 2 mg/mL): 10 mg ÷ 2 mg/mL = 5 mL = 5 full 1 mL syringe draws.

Storage After Reconstitution

Store reconstituted MOTS-c at 2–8°C. When reconstituted in bacteriostatic water, the solution is generally stable for 4–6 weeks under refrigeration. Because MOTS-c is a short peptide it is relatively stable, but freeze-thaw cycles should still be avoided. Label the vial with reconstitution date and concentration. Lyophilized powder is stable for 12–24 months when stored at -20°C.

Safety Notes and Research Framing

MOTS-c is a naturally occurring mitochondria-derived peptide first identified in 2015. Preclinical research has explored its roles in glucose homeostasis, age-related metabolic decline, and exercise physiology. It is not FDA-approved for human therapeutic use and has not completed clinical trials. This guide is for research reference only. Sterile technique and appropriate institutional protocols must be followed.