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Calculate MOTS-c Dosage Reconstitution Math: Concentration Comparison
Different reconstitution volumes produce different concentrations from the same vial, changing the injection volume required for identical doses. The table below shows how reconstitution volume affects concentration, required injection volume for a 5mg dose, a
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- Different reconstitution volumes produce different concentrations from the same vial, changing the injection volume required for identical doses. The table below shows how reconstitution volume affects concentration, required injection volume for a 5mg dose, and total usable doses from a 10mg MOTS-c vial.
- 1mL
- 10mg/mL
- 0.5mL (50 units)
- 2 doses
- Standard insulin syringe adequate
- Highest concentration—smallest injection volume but requires precise measurement at 0.5mL
- 2mL
- 5mg/mL
- 1mL (100 units)
- Balanced option—full 1mL syringe capacity for 5mg dose, easy to measure accurately
- 3mL
- 3.33mg/mL
- 1.5mL (requires two draws or larger syringe)
- Requires 3mL syringe or two separate draws
- Lower concentration—exceeds 1mL insulin syringe capacity, complicates dosing
- 2.5mL
- 4mg/mL
- 1.25mL (requires larger syringe)
- Requires syringe larger than 1mL
- Non-standard concentration—awkward volume calculations, no practical benefit
- The 2mL reconstitution volume with a 10mg vial creates a 5mg/mL concentration that aligns perfectly with standard insulin syringe capacity—one full 1mL syringe delivers exactly 5mg, the most commonly referenced MOTS-c research dose. This is why 2mL is the default recommendation: it produces round numbers, minimizes measurement error, and uses equipment already present in most labs.
- Using 1mL of bacteriostatic water doubles the concentration to 10mg/mL, halving the injection volume for the same dose. This works well for researchers comfortable with sub-1mL measurements or those using larger doses (10mg requires a full 1mL draw at this concentration). The tradeoff: smaller volumes amplify measurement error—a 0.05mL error at 10mg/mL represents 0.5mg of dosing variance, versus 0.25mg at 5mg/mL.
- Reconstituting with more than 2mL lowers concentration but increases injection volume beyond what standard 1mL insulin syringes can accommodate. A 3mL reconstitution creates 3.33mg/mL—requiring 1.5mL for a 5mg dose, which means either using a 3mL syringe (less common in peptide research) or drawing twice from the vial, introducing additional contamination risk and procedural complexity.