Informational only. Not medical advice.INFORMATIONAL PLATFORM ONLY — NOT MEDICAL ADVICE, DIAGNOSIS, OR TREATMENT
Informational only. Not medical advice.INFORMATIONAL PLATFORM ONLY — NOT MEDICAL ADVICE, DIAGNOSIS, OR TREATMENT
The only human cathelicidin antimicrobial peptide (37 aa, starting with two leucines) — a dual-role molecule: broad-spectrum antimicrobial and immunomodulator, but also an autoantigen implicated in psoriasis, rosacea, and lupus. Research-use only; not FDA-approved.
Lowest Price
$37.99
Highest Price
$693.00
Average Price
$98.52
Potential Savings
93%
across 27 options
3 of 27 vendors are lab-verified for LL-37
We cross-check each vendor's Certificate of Analysis against the issuing lab's own verification portal — so “cheapest” isn't the only signal.
Best price trend
Lowest $/mg for LL-37 · last 46 days
$1.96/mg
▼ 61% vs 46d ago
Trust grade first, cheapest within grade
vial · 5mgpeptidology.co· price updated today
Lot 1669· tested 2026-02-04
$10.00/mg
80% more per mg
vial · 5mgskyepeptides.com· price updated today
Lot LL25-04-002· tested 2025-10-14
$14.80/mg
87% more per mg
vial · 5mgverifiedpeptides.com· price updated today
Lot LL05260305C· tested 2026-05-12
$13.14/mg
85% more per mg
vial · 10mgsimplepeptide.com· price updated today
Lot L1-05-01162026-J· tested 2026-01-19
$5.40/mg
64% more per mg
vial · 10mgascensionpeptides.com· price updated today
$119.99−8%
$110.00$11.00/mg
82% more per mg
vial · 50mgzztai-tech.com· price updated today
$1.96/mg
vial · 5mgtexpeptide.com· price updated today
$8.00/mg
76% more per mg
vial · 5mgcertified-pep.com· price updated today
Lot 250819LL5· tested 2026-02-16
$17.80/mg
89% more per mg
vial · 5mgmedgepeptides.com· price updated today
Lot LL375LT12· tested 2026-01-12
$15.00/mg
87% more per mg
vial · 10mgezpeptides.com· price updated today
$7.80/mg
75% more per mg
vial · 5mgreta-peptide.com· price updated today
$29.00/mg
93% more per mg
vial · 10mgalphaomegapeptide.com· price updated today
$5.40/mg
64% more per mg
vial · 10mgplatinumlionpeptides.com· price updated today
$75.00−20%
$59.99$6.00/mg
67% more per mg
vial · 10mgmyoasislabs.com· price updated today
$6.50/mg
70% more per mg
vial · 5mgmodernresearchpeptides.net· price updated today
$7.60/mg
74% more per mg
vial · 5mgpeptira.com· price updated today
$7.80/mg
75% more per mg
vial · 5mgtruepeptidelabs.com· price updated today
$8.00/mg
76% more per mg
vial · 5mgamc-essentials.com· price updated today
$8.60/mg
77% more per mg
vial · 5mgpeptidecrafters.com· price updated 2d ago
$10.00/mg
80% more per mg
vial · 5mgsouthernaminos.com· price updated today
$79.00−25%
$59.25$11.85/mg
83% more per mg
vial · 10mgpolarispeptides.com· price updated today
$12.50/mg
84% more per mg
vial · 50mgatomiklabz.com· price updated today
$13.86/mg
86% more per mg
vial · 5mgsolutionpeptides.net· price updated today
$15.40/mg
87% more per mg
vial · 5mgyoursoma.com· price updated today
$16.60/mg
88% more per mg
vial · 5mgbiotechpeptides.com· price updated today
$17.20/mg
89% more per mg
vial · 5mgcorepeptides.com· price updated today
$17.80/mg
89% more per mg
vial · 10mggeneticpeptide.com· price updated today
$200.00−10%
$180.00$18.00/mg
89% more per mg
vial · 5mgionpeptide.com· price updated today
Lot LL375-03232026· tested 2026-03-26
$9.00/mg
78% more per mg
vial · 5mgbiolongevitylabs.com· price updated today
Lot 16-3-45954· tested 2025-11-19
$18.99/mg
90% more per mg
vial · 10mgpeptidetech.co· price updated 2d ago
$5.00/mg
61% more per mg
Check formulation: Lyophilized powder requires reconstitution before use. Pre-mixed solutions are more convenient but may have a shorter shelf life and higher prices.
Compare per-mg cost: Different strengths and quantities make direct price comparison difficult. Calculate the per-milligram cost to find the true best value.
Verify COAs: Look for vendors that publish per-batch Certificates of Analysis from named, accredited labs. Every vendor on this page is verified for endotoxin testing — not just HPLC purity.
LL-37 was characterized in the mid-1990s as the processed antimicrobial product of hCAP-18 (Gudmundsson et al., 1996). Dürr et al. (2006, Biochim Biophys Acta, PMID 16716248) provided a foundational review of its structure and activity as the sole human cathelicidin. Overhage et al. (2008, Infection and Immunity, PMID 18591225) showed LL-37 prevents Pseudomonas aeruginosa biofilm formation at 0.5 µg/mL — far below its MIC. A randomized, placebo-controlled Phase 1/2 trial (Grönberg et al., 2014, Wound Repair and Regeneration, PMID 25041740) found topical LL-37 safely accelerated healing of hard-to-heal venous leg ulcers at low doses. Its dual role in autoimmunity is well established: Lande et al. (2014, Nature Communications, PMID 25470744) identified LL-37 as a T-cell autoantigen in two-thirds of moderate-to-severe plaque psoriasis patients. No FDA approval exists for any indication. Injectable grey-market protocols for Lyme, biofilm, or mold illness lack controlled clinical evidence and carry theoretical autoimmune risk given LL-37's role in psoriasis, lupus, and rosacea pathogenesis.
This platform provides informational tools only, not medical advice.
LL-37, the only human member of the cathelicidin family of antimicrobial peptides (Dürr et al., 2006)
2006
Human host defense peptide LL-37 prevents bacterial biofilm formation (Overhage et al., 2008, Infect Immun)
2008
Treatment with LL-37 is safe and effective in enhancing healing of hard-to-heal venous leg ulcers: a randomized, placebo-controlled clinical trial (Grönberg et al., 2014)
Prices verified as of June 2026. Actual prices may vary. For research use only.
Prices are estimates and may vary. For research use only. We may earn a commission on purchases through affiliate links. Not medical advice.
2014
Disclosed Labs