How many units of LL-37 should I draw?

It depends on your vial size, BAC water, and dose. For a 5mg vial with 2mL BAC water, a beginner dose of 50mcg is typically 2 units on a U-100 syringe. Use the calculator above for your exact numbers.

How much BAC water should I add to LL-37?

The standard amount is 2mL of bacteriostatic water for a 5mg vial. More water gives a more dilute solution — easier to measure small doses. Less water means fewer injections per vial. Adjust the BAC water slider in the calculator to see how it changes your syringe units.

How long does a LL-37 vial last?

At a beginner dose of 50mcg 2x/week, a 5mg vial lasts about 100 doses. The calculator shows exact doses per vial for your selected tier.

What syringe should I use for LL-37?

Most people use a U-100 insulin syringe (1mL / 100 units). For very small doses, a U-50 or U-30 syringe gives better precision. The calculator adjusts units automatically for whichever syringe you pick.

LL-37 Dosage Calculator

ImmuneInjectionPreclinical~4-6 hours half-life

LL-37 is the only human cathelicidin antimicrobial peptide, naturally produced by immune cells, epithelial cells, and barrier tissues.

Broad-spectrum antimicrobial: bacteria, viruses, fungiBreaks down bacterial biofilmsEnhances innate immune defensePromotes wound healing

Vial Size

BAC Water (mL)

Dosing Level

50mcg · 2x/week

Custom Dose (mcg) — optional

Syringe Type

2.0 units

100 units (1mL)

Concentration

2,500

mcg/mL

Draw Volume

0.020

Syringe Units

2.0

units

Doses / Vial

100

doses

Very small draw (2.0 units) — difficult to measure accurately. Consider using less BAC water for a more concentrated solution.

Try 1mL BAC water for an easier-to-measure draw.

Summary: Add 2mL BAC water to your 5mg vial. Draw to 2.0 units on a U-100 syringe for a 50mcg dose. This vial will last 100 doses.

Cycle Planner

Cycle Length (weeks)

Price Per Vial ($) — optional

Subcutaneous. Typical beginner frequency: 2x/week.

LL-37 Pharmacokinetics

Pharmacokinetics — Active Dose Over Time

t½ = ~4-6 hours

After 1 half-life (5h): 50% remainsAfter 2 half-lives (10h): 25% remainsAfter 3 half-lives (15h): 12.5% remains

At a 100mcg dose: 50% = 50mcg remaining after 5h. Recommended frequency: 2x/week.

Disclaimer: This curve is a simplified first-order exponential decay model. Actual pharmacokinetics vary based on injection site, individual metabolism, body composition, and other factors. Half-life values are approximate and based on available preclinical and clinical literature. Many research peptides lack formal human pharmacokinetic studies. This is for educational purposes only — not medical advice.

LL-37 Dosing Protocol

Level	Dose / Injection	Frequency
Beginner	50mcg	2x/week
Moderate	100mcg	2x/week
Aggressive	200mcg	3x/week

Note: Human cathelicidin antimicrobial peptide. Very potent — use low doses. Broad-spectrum antimicrobial activity against bacteria, viruses, fungi, and biofilms. Cycle 4-6 weeks. Monitor for injection site reactions.

About LL-37

LL-37 is the only human cathelicidin antimicrobial peptide, naturally produced by immune cells, epithelial cells, and barrier tissues. It's a 37-amino-acid peptide that forms the body's first line of innate immune defense. It directly kills bacteria, viruses, and fungi by disrupting their membranes, and is uniquely effective at breaking down biofilms — the protective structures bacteria form in chronic infections. It also modulates the immune response and promotes wound healing.

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