SYRINGE DRAW GUIDE
L-Carnitine Draw on Insulin Syringe
Quick answer: For the standard 1000 mg + 5 mL reconstitution (200 mg/mL), a 1000 mg L-Carnitine dose requires 5 mL, which is 500 IU on a 100-unit U-100 insulin syringe.
1000 mg draw on 30u, 50u, and 100u U-100 syringes
Dose ladder - does it fit?
How draw volume changes with dose strength, plus which insulin syringe sizes will accommodate it without overflow.
| Dose | Volume | IU (100u) | 30u | 50u | 100u |
|---|---|---|---|---|---|
| 500 mg | 2.5 mL | 250 IU | - | - | - |
| 1000 mg Std | 5 mL | 500 IU | - | - | - |
| 1500 mg | 7.5 mL | 750 IU | - | - | - |
| 2000 mg | 10 mL | 1000 IU | - | - | - |
| 3000 mg | 15 mL | 1500 IU | - | - | - |
How to read the draw
- Read the large numbered marks (10, 20, 30 ...) on the syringe barrel to find your IU target.
- Pull the plunger until the rubber stopper aligns with that mark, not the bevel.
- Flick the syringe to dislodge air bubbles, then push the plunger to expel any remaining air, ending at the target IU mark.
- Confirm the volume reads correctly under good light before injection.
Frequently asked
How many insulin syringe units is 1000 mg of L-Carnitine?
For the standard ASCEND reconstitution (1000 mg vial + 5 mL BAC water = 200 mg/mL), a 1000 mg dose of L-Carnitine requires 5 mL, which is 500 IU on a 100-unit U-100 insulin syringe.
Which insulin syringe size is best for L-Carnitine?
A 100-unit (1 mL) U-100 insulin syringe is required for a 500 IU L-Carnitine draw; smaller syringes will overflow.
What is the difference between U-100 and U-40 syringes for peptide use?
U-100 syringes are calibrated so that 100 units = 1 mL. Peptide reconstitution math universally assumes U-100. Never use U-40 syringes for research peptides; the scale will be wrong by a factor of 2.5x and could result in a serious dosing error.
Can I split a single L-Carnitine dose across multiple injection sites?
Some researchers split larger draw volumes across two injection sites to reduce local tissue reaction. Splitting does not change the total dose delivered or the math; it only changes site distribution. Rotate sites with each subsequent dose.
Why does the draw value matter for L-Carnitine?
L-Carnitine dosing is sensitive to precise draw volume. A 1-unit error on a 100-unit insulin syringe corresponds to 200 mg/mL times 0.01 mL of peptide; a small error in absolute volume can be a large percent error at microgram-scale doses. Use the ASCEND calculator for exact values.
Related
For research use only. Not medical advice. Always use U-100 (not U-40) insulin syringes for peptide reconstitution. ASCEND, ascendpeptide.org