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Immunity

LL-37 dosing guide

The body's broad spectrum antimicrobial peptide.. Everything below is the arithmetic of this vial — what to mix, what to draw, how often, and for how long.

Also sold as: ll37, cathelicidin

The protocol at a glance

Vial size
10 mg
Bacteriostatic water
4 mL
Concentration
2.50 mg/mL
Dose
125 mcg
Draw on a 1 mL syringe
5 units
Timing
AM
Frequency
Every day
Cycle length
50 days straight, 4 weeks off
Doses per vial
about 80

Most vendors ship 10mg vials.

Draw to here
00.0100.1200.2300.3400.4500.5600.6700.7800.8900.91001.0DRAW TO 5u100-UNIT · 1 mL SYRINGELL-37
Change the vial or water volume in the calculator →

Mixing it, step by step

Step by step

Reconstitution steps

Every step below uses the numbers you entered above.

  1. 1
    Wipe both stoppers

    Swab the rubber tops of the 10 mg LL-37 vial and the bacteriostatic water vial with fresh alcohol pads. Let them air dry for a few seconds.

  2. 2
    Draw 4 mL of BAC water

    Pull 4 mL of bacteriostatic water into a reconstitution syringe (usually a 3 mL syringe with a 21g needle).

  3. 3
    Add water slowly, down the side

    Inject the water against the inside wall of the vial, don't blast it directly onto the powder. This protects the peptide from shear damage.

  4. 4
    Swirl, don't shake

    Gently swirl until the powder is fully dissolved and the liquid is clear. Never shake, foaming denatures the peptide.

  5. 5
    Draw 5 units on a 1 mL syringe

    On your 100-unit (1 mL) insulin syringe, pull the plunger back until the rubber tip lines up with 5, that's your 125 mcg dose. Tap out any air bubbles, then inject as directed.

  6. 6
    Store refrigerated

    Cap the vial and store at 2–8 °C (36–46 °F). Most reconstituted peptides remain stable for 3–4 weeks refrigerated.

What to expect, week by week

Week 1

Subtle. Sleep may improve as inflammation drops.

Weeks 2–4

Fewer minor infections, better recovery from training or travel stress.

Post-cycle

Benefits carry for weeks. Bioregulator-style cycles (20–30 days on, then off) are typical.

Side effects to watch

  • Die off symptoms early on
  • Headache and fatigue
  • Mild injection site irritation

Why people run it

  • Broad antimicrobial effect
  • Biofilm disruption
  • Modulates innate immunity

What to stack it with

Ready to run LL-37?

Read the full compound page, or check current pricing.

Educational reference only. Doses shown reflect commonly reported research protocols and are not medical advice.

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