LL-37 calculator
LL-37 is the active fragment of human cathelicidin, an antimicrobial peptide your own cells make. The only human trial is topical: 0.5 to 1.6 mg/mL applied twice a week to leg ulcers sped healing, and 3.2 mg/mL did not.
LL-37 at a glance
LL-37 units chart
5 mg vial. Rows are doses; columns show the units to draw on a U-100 syringe at each water volume.
| Dose | mL | U-100 units | Doses per vial |
|---|---|---|---|
| 100 mcg | 0.1 | 10 | 50 |
| 200 mcg | 0.2 | 20 | 25 |
| 250 mcg | 0.25 | 25 | 20 |
| 500 mcg | 0.5 | 50 | 10 |
| 1 mg | 1 | 100 | 5 |
| 2 mg | 2 | 200 | 2 |
| 2.5 mg | 2.5 | 250 | 2 |
| 5 mg | 5 | 500 | 1 |
Other mixes: 5 mg + 1 mL · 5 mg + 2 mL · 5 mg + 3 mL
About the LL-37 math
LL-37 is a 37-amino-acid fragment of human cathelicidin. A smaller set of suppliers carries it, and the listing is almost always a 5 mg vial of lyophilized powder. The example draw here is 200 mcg, run at three solvent volumes. A 5 mg vial with 2 mL of bacteriostatic water is 2.5 mg/mL, or 2,500 mcg/mL. A 200 mcg draw is 0.08 mL, or 8 units on a U-100 syringe, and 5,000 divided by 200 is 25 draws per vial. With 2.5 mL the concentration is 2,000 mcg/mL and the same draw is 0.1 mL, or an even 10 units. With 1 mL it is 5,000 mcg/mL and 200 mcg shrinks to 0.04 mL, or 4 units. A 100 mcg draw halves each of those figures: 4 units, 5 units and 2 units, with 50 draws in the vial. For a draw this small, the 2.5 mL fill is the one that puts a round 100 mcg on every 5 units, which is the easiest spacing to read on a 0.3 mL or 0.5 mL barrel.
LL-37 questions
LL-37 peptide dosage?
No human injection dose exists. Community use is 100 to 200 mcg subcutaneously once a day, 5 days a week, for 2 to 4 weeks. The human trial used it on the skin at 0.5 to 1.6 mg/mL twice a week, and the higher 3.2 mg/mL dose did worse than the low ones.
How many units of LL-37 is 100 mcg?
With 5 mg in 5 mL (1 mg/mL) 100 mcg is 10 units. With 2 mL of water it is 4 units, which is hard to read, so use the full 5 mL.
How many units is 200 mcg of LL-37 at 5 mg in 2 mL?
5 mg divided by 2 mL is 2.5 mg/mL, or 2,500 mcg/mL. 200 mcg divided by 2,500 mcg/mL is 0.08 mL. On a U-100 syringe 0.08 mL is 8 units.
How much bacteriostatic water for a 5 mg vial of LL-37?
Any volume the vial holds. 1 mL gives 5 mg/mL, 2 mL gives 2.5 mg/mL and 3 mL gives 1.67 mg/mL (rounded). A 100 mcg draw is 2 units, 4 units or 6 units at those three concentrations.
How many 100 mcg draws are in a 5 mg vial of LL-37?
5 mg is 5,000 mcg, and 5,000 divided by 100 is 50 draws. The count does not depend on solvent volume; with 2.5 mL in the vial each 100 mcg draw is 0.05 mL, or 5 units.
- 1Licensed Peptides two accredited labs on every lot, certificates public, card and Apple Pay checkout
- 2Core Peptides long track record, public certificates, wide catalog
- 3Ascension Peptides public third-party testing, clear pricing