LL-37 Peptide For Sale

What LL-37 Costs Right Now

WPA currently tracks LL-37 at 10 verified vendors across 11 separate LL-37 listings. In-stock LL-37 vials run from $32.13 to $80.75 — a 2.5x spread for the same compound. Flawless Compounds holds the lowest sticker price at $32.13. Normalized to milligrams, LL-37 costs $4.45/mg to $14.25/mg on this page. The best per-milligram value is the 10mg vial from Ascension Peptides.

LL-37 is stocked in 2 sizes: 5mg and 10mg vials. Because vials of different strengths rarely scale linearly in price, the per-milligram column is the only fair way to rank them.

Ranked by true cost per milligram, the LL-37 listings WPA tracks are: Ascension Peptides — 10mg at $44.50 ($4.45/mg), COA purity 99.94%; Flawless Compounds — 5mg at $32.13 ($6.43/mg), COA purity 99.81%; Glow Aminos — 5mg at $32.13 ($6.43/mg), COA purity 99.81%; Peptira — 5mg at $33.15 ($6.63/mg), COA purity 99.93%; Ameano Peptides — 10mg at $72 ($7.20/mg), COA purity 99.50%.

LL-37 COA Coverage Across Tracked Vendors

8 of the 11 tracked LL-37 listings (73%) publish a third-party Certificate of Analysis. Assayed purity on those reports ranges from 99.00% to 99.94%. 6 listings report more LL-37 in the vial than the label claims, which lowers the real cost per milligram below the printed price. The most recent LL-37 COA on file is dated 6/26. The remaining 3 listings have no published report, so its purity is the vendor's own claim.

A COA is only worth what it proves: it has to name the independent lab, be dated within the last 12 months, and match the exact LL-37 batch and vial size on sale. Open the linked report before ordering rather than trusting the badge.

How Researchers Actually Dose LL-37

Across 43 LL-37 calculator runs logged by the WPA community, the most common dose entered is 200mcg, most often once weekly. The size researchers calculate against most often is the 5mg vial (34 runs). The most common bacteriostatic water volume is 2mL, which is what sets the draw marks on the syringe for that dose. At that dose a 10mg vial yields roughly 50 doses, so the vial size you buy decides how often you reorder as much as the price does.

LL-37 Discount Codes

11 of the 11 tracked LL-37 listings carry a WPA researcher discount code. The largest live discount is 50% off. Every price and per-milligram figure on this page is the post-discount number, so you are never comparing a discounted listing against an undiscounted one. Codes change and some exclude sale items or carry order minimums.

About LL-37

LL-37 is a 37-residue human cathelicidin peptide — the body's only cathelicidin — most often sourced for antimicrobial, wound-healing, and immune research. It works as both a broad-spectrum antimicrobial and an immune-signaling molecule. It ships as a lyophilized powder you reconstitute with bacteriostatic water before use.

Its reported half-life is ~30–60 min, which is the main reason the community cadence above looks the way it does. Not FDA-approved.

How to Read the LL-37 Comparison

• Price per milligram — Every LL-37 listing is normalized to $4.45/mg-style unit pricing, so a small cheap vial cannot hide a worse real cost than a larger one.
• COA status and purity — The 8 COA-backed LL-37 listings show assayed purity and test date so quality is a number, not a claim.
• Vials sizes — All 2 stocked LL-37 sizes (5mg and 10mg vials) sit in one table.
• Stock status — Live in-stock state for each LL-37 listing, refreshed on a recurring basis.

Frequently Asked Questions: LL-37

Is it legal and safe to buy LL-37 for research?

In the US, LL-37 is sold strictly as a research chemical — legal to buy for laboratory research but not approved for human use. It is a synthetic antimicrobial peptide with no approved human form, sold strictly for laboratory research. The real variable isn't legality, it's quality: unverified suppliers can ship underdosed, impure, or mislabeled material. Every LL-37 vendor in the table on this page is screened for a published third-party Certificate of Analysis (COA), which is your one objective quality check. Right now that screen covers 11 LL-37 listings from 10 vendors.

How do I verify a LL-37 COA so I'm not getting an underdosed vial?

A Certificate of Analysis (COA) is the third-party lab report for one specific LL-37 batch — your only proof the vial is real and full-strength. Check four things: identity (it's actually LL-37, the full 37-residue cathelicidin peptide, not a truncated fragment), assay/purity (ideally 98% or higher), a named independent lab (not the vendor's own in-house claim), and a recent test date. WPA flags COA status per listing, but a marketing screenshot isn't enough — open the actual COA on the vendor's site before paying. For LL-37 specifically, 8 of 11 tracked listings (73%) publish one, with assayed purity between 99.00% and 99.94%, the most recent dated 6/26. Every row in the table links straight to it.

Which LL-37 vendor should I pick?

There's no single "best" LL-37 vendor — it depends on what you weigh most. WPA ranks every verified vendor by a composite of assayed purity, COA recency, lifetime click popularity among researchers, final price, and in-stock plus discount availability. LL-37 is a long 37-residue peptide whose synthesis quality varies widely between sources, so weigh assayed purity and a recent COA heavily. 10 vendors currently carry LL-37, and Ascension Peptides holds the best true value at $4.45/mg on the 10mg vial. If you just want the strongest all-round value, the top-ranked LL-37 vendor on this page is a safe starting point — but confirm its purity and price fit your protocol first.

How much does LL-37 cost — and how do I know I'm not overpaying?

Judge LL-37 by true price per milligram, not the sticker price on one vial — a cheap small vial often costs more per mg than a larger one. It most often ships in 5 mg vials, so compare $/mg across those rather than the sticker price on one vial. Tracked LL-37 listings currently run $4.45/mg to $14.25/mg across 5mg, 10mg vials. WPA normalizes every verified listing to $/mg, and the live cost-per-month card estimates your real spend at the most common dose, so overpaying becomes obvious at a glance. The one catch: the lowest $/mg sometimes means buying a bigger vial than your cycle needs.

How much LL-37 do I need for one full cycle?

LL-37 is typically dosed about three times a week, and 0.5 mg is the most common dose in WPA data. At 0.5 mg per dose a single 5 mg vial covers a little over three weeks, so a standard run usually needs two of the popular 5 mg vials. Across 43 LL-37 calculator runs logged here the most common dose is 200mcg once weekly; a 10mg vial covers roughly 50 of them, and that is the figure the cost-per-month card on this page is built on. Protocols vary and this reflects the most common community setup, not medical advice — research use only. Use the cost-per-month card and the calculator on this page to size your exact run, then buy enough to finish a cycle without re-ordering mid-protocol.

Are discount codes available for LL-37?

Yes — many verified LL-37 vendors offer WPA researcher discount codes, and those savings are already baked into the $/mg ranking on this page, so you're never comparing a pre-discount price against a post-discount one. Codes do change, and some exclude sale items or carry order minimums. 11 of the 11 tracked LL-37 listings carry a code right now, the largest worth 50% off. Each listing shows the current code and the discounted price where one exists.

Lowest priced LL-37 peptide for sale?

To surface the lowest priced LL-37 for sale, WPA continuously compares 16 USA suppliers and 967 "for research" products, ranking every verified LL-37 listing by true cost so the cheapest vials rise to the top. The lowest priced single LL-37 vial currently starts at $32.13. We currently track 11 LL-37 products in our system. Pricing is generally refreshed weekly as vendors update stock, prices, and discount codes.