MOTS-c Reconstitution: BAC Water, Mixing and Storage
MOTS-c is investigational and not FDA-approved. This article summarizes community practice, not medical advice. Nothing here is a dose recommendation.
There's no official mixing ratio for MOTS-c, it's investigational. These are the community-standard volumes, not medical instructions. None of this is a dose recommendation, it's how people prepare the vial so the dosing math is clean.
How much BAC water for a MOTS-c vial?
The common move for a 10mg vial is 1mL of bacteriostatic water. It's the conventional peptide format and it makes the math clean.
Here's why 1mL is the easy one. Put 1mL into a 10mg vial and you've got 10mg spread across 100 units on a standard U-100 insulin syringe. So 10 units = 1mg. Two milligrams is 20 units. No calculator gymnastics.
Some people use 0.5mL instead. Same 10mg, half the water, so the physical shot is smaller. The tradeoff: your dosing lines get tighter (now 5 units = 1mg), and a more concentrated shot can irritate the skin a little more. If you're getting welts, more water helps, not less.
Whatever volume you pick, run it through a reconstitution calculator once so you're not eyeballing it. Our reconstitution calculator saves the recipe so you do the math one time per vial.
How to mix it without wrecking the peptide
Peptides are fragile. You're rehydrating something delicate, not shaking up a protein shake.
Draw your BAC water, put the needle into the MOTS-c vial at an angle, and aim the stream at the glass wall, not straight down onto the powder. Let it run down the side.
Then swirl, don't shake. Gentle swirl until it's clear. Shaking foams it and can beat up the peptide. Give it a minute and it usually dissolves on its own.
Why is my MOTS-c crystallizing?
This one has a specific community answer, usually one of two things.
Fridge too cold. MOTS-c can crystallize near freezing. The good news: it often re-liquefies once it warms back up, or after a little more BAC water goes in.
Not enough water. Under-diluting is the other common cause. If you went minimal on the water and it's crystallizing, adding a bit more usually fixes it.
So crystals in the vial aren't a reason to toss it. Let it come to room temp, and add a touch more BAC water if it doesn't clear.
How to store MOTS-c and how long it lasts
Reconstituted MOTS-c goes in the fridge, not the freezer, and not shoved to the back where it sits near freezing (see: crystallizing).
Honest note on shelf life: the community doesn't agree on an exact number of days reconstituted MOTS-c stays good, and anyone giving you a confident "it lasts exactly X days" is guessing. What people do agree on is the practical stuff: keep it cold, don't let the fridge get too cold, don't under-dilute. The dry powder is stable cold for a long time. It's the mixed vial where potency slowly ticks down, so mix what you'll actually use rather than a giant batch you'll nurse for months.
| Vial size | BAC water | Concentration | On a U-100 syringe |
|---|---|---|---|
| 10 mg | 1 mL (standard) | 10 mg/mL | 10 units = 1 mg |
| 10 mg | 0.5 mL (low-volume) | 20 mg/mL | 5 units = 1 mg |
| 5 mg | 1 mL | 5 mg/mL | 20 units = 1 mg |
Skip the mental math
- Reconstitution calculator gives you exact units
- Save the recipe per vial
- Log doses and welt notes in one place
Frequently Asked Questions
How much BAC water for 10mg MOTS-c?
1mL is the standard, giving a clean 10 units = 1mg on an insulin syringe. Some use 0.5mL for a smaller shot.
Do you refrigerate MOTS-c?
Yes, once reconstituted it lives in the fridge. Not the freezer, and not so cold it crystallizes.
How long does reconstituted MOTS-c last in the fridge?
The community doesn't agree on an exact number. Keep it cold, don't sit on a mixed vial for months, and mix what you'll use.
Why is my MOTS-c crystallizing?
Usually the fridge is too cold or there's not enough BAC water. Let it warm up and add a little more water if needed. It often re-dissolves.
Can you shake MOTS-c to mix it?
No, swirl it. Shaking foams it and can damage the peptide. Aim the water at the glass wall and swirl gently.
Related reading
- MOTS-c Guide: What It Does and How People Run It
- MOTS-c Injection Sites: Where to Inject and Avoiding Bumps
- Peptide Reconstitution Calculator Guide
- Peptide Storage Guide
- MOTS-c Tracker
This article summarizes community practice, not medical advice. MOTS-c is investigational and not FDA-approved. Talk to a licensed provider before starting, changing, or stopping any medication.
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