LL-37 Dosage Calculator & Research Doses

1Set Up Your Mix

1 mg/mL · 1000 mcg/mL

1. Pick your peptide

2. How much peptide is in the vial? It's printed on the label — usually something like 5 mg

3. How much water are you adding? More water makes each dose easier to measure

4. How much do you want per dose?

All answers assume a standard 1 mL U-100 syringe, where 1 unit = 0.01 mL. That is the usual insulin syringe and the one every number here is based on.

Your Answer — LL-37Your Answer

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25Draw To This Line

0.25That's This Many mL

20Doses In The Vial

5 mg ÷ 5 mL = 1 mg/mL → 250 mcg ÷ 1 mg/mL = 0.25 mL → × 100 = 25 units—

Looks good. Draw to 25 units on a 1 mL syringe. That is an easy amount to measure, and this vial gives you 20 doses.

2Week-By-Week Plan — LL-37

Start low, work up

When	Dose	How Often	How Many mL	Draw To	Number Of Doses
Low reported	100 mcg	1× daily	0.1 mL	10 u	50 doses
Mid reported	250 mcg	1× daily	0.25 mL	25 u	20 doses
Upper	500 mcg	1× daily	0.5 mL	50 u	10 doses

Weeks until the top dose

4 weeks

Peptide used getting there

4.9 mg

Vials you'll need

1 × 5 mg

Once you're at the top dose

14 mg / 4 wk · 2.8 vials

Where this plan came from

Built from this peptide's dose range

Where this came from: Built from the doses listed for this peptide below — start at the lowest and step up, using the studies cited on this page. Nobody publishes a week-by-week plan for this peptide, so we built one: the doses are the researched ones shown below, and we simply put them in order from lowest to highest. Treat it as a starting point, not an official schedule.

3Common Doses — LL-37

worked out for your mix

Level	Dose	How Often	How Many mL	Draw To	Doses In Vial
Weeks 1–2	100 mcg	daily	0.1 mL	10 u	14	1.4 mg
Weeks 3–4	250 mcg	daily	0.25 mL	25 u	14	3.5 mg
Week 5 onward per 4 weeks from here on	500 mcg	daily	0.5 mL	50 u	28	14 mg

Please read this. These numbers come from published research. They are here as reference, not as instructions. A lot of them come from lab studies rather than studies in people, and some of these peptides have never been given to a person at all.

About LL-37About This Peptide

Immune & Anti-microbial

Also known as

Cathelicidin antimicrobial peptide, hCAP-18 fragment

Class

Immune & Anti-microbial

Route

Subcutaneous

Half-life

Short

Evidence tier

Preclinical

The sole human cathelicidin-derived antimicrobial peptide. Well characterised in immunology literature for direct antimicrobial and immunomodulatory activity; also implicated in rosacea and psoriasis pathology, which cuts against naive "more is better" reasoning.

Buy LL-37this peptide

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Where These Numbers Come From

Preclinical — Preclinical and in-vitro data only — no human dosing trials

The human antimicrobial peptide LL-37 — structure and function Dürr UHN, Sudheendra US, Ramamoorthy A. Biochimica et Biophysica Acta, 2006

Standard structural and mechanistic reference.

Find on PubMed ↗

Cathelicidin LL-37 in rosacea and inflammatory skin disease Yamasaki K, Gallo RL. Journal of Dermatological Science, 2007

Documents the pathological side of elevated LL-37 — essential context.

Find on PubMed ↗

Newest Studies — —

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Not reviewed by us. This list is pulled straight from Europe PMC as papers are published. Nobody has checked whether these are any good, or whether they change anything above. The dose numbers on this page only ever change after a person reviews the evidence.

Research Use Only — Confirm to Continue

LL-37 Dosage & Reconstitution