$67.79Original price was: $67.79.$49.79Current price is: $49.79.
Sale Ends In:
Loading...
LL 37 5mg is formulated for precise research applications. At Ultra Peps, we prioritize consistency, reliability, and research-focused handling standards.
Immune response and inflammation signaling
Antimicrobial and bacterial defense studies
Tissue repair and cellular regeneration research
Trusted research supplier
Fast order processing
Reconstitution Required: This product recommends Reconstitution solution Add Reconstitution Solution
LL-37 5mg is a human-derived antimicrobial peptide studied for its role in immune response, cellular repair, and host defense mechanisms. Additionally, researchers utilize LL-37 in controlled environments to examine how the body responds to microbial exposure, inflammatory signaling, and tissue-related biological processes.
Given its unique biological profile, LL-37 is currently the only known human cathelicidin peptide and participates in multiple pathways related to innate immunity and cellular communication. Furthermore, this peptide is expressed in several tissues and immune cell populations, including neutrophils, mast cells, and epithelial cells throughout the skin and respiratory tract. As a result, LL-37 remains a valuable research tool in studies involving immune signaling, barrier function, and tissue biology.
Mode of Action
LL-37 functions as a cationic host defense peptide that interacts with microbial membranes and immune signaling pathways. Like other cathelicidins, LL-37 displays broad-spectrum antimicrobial activity against bacteria, fungi, and some enveloped viruses.
In addition, this peptide can disrupt microbial cell membranes directly, which helps prevent pathogen survival. At the same time, LL-37 influences immune responses by modulating inflammatory signaling and recruiting immune cells to sites of tissue injury or infection.
Researchers have also observed that LL-37 can interact with DNA and RNA released from damaged cells, which may activate immune cells such as dendritic cells. In addition, this interaction plays a role in immune signaling and inflammatory responses observed in certain skin conditions.
Research Applications
This compound is commonly used in:
• Antimicrobial peptide investigations
• Immune signaling research
• Cellular communication studies
• Barrier function research
• Tissue biology investigations
• Peptide pharmacology research
• Advanced laboratory research applications
Related Research Compounds
Thymosin Alpha-1 (Tα1)
Thymosin Alpha-1 is one of the closest research compounds to LL-37 in terms of immune system signaling and host defense pathway investigations. Researchers frequently compare both peptides when studying immune-regulatory mechanisms.
BPC-157 is commonly studied in laboratory models involving cellular signaling, tissue biology, and molecular communication pathways. Researchers often investigate BPC-157 and LL-37 together to better understand complementary biological signaling mechanisms.
TB-500 is frequently examined in studies involving cellular migration, tissue organization, and peptide-mediated signaling pathways. It serves as a useful comparative compound in tissue biology research.
KPV
KPV is commonly investigated for its role in immune signaling, inflammatory pathway regulation, and cellular communication. Researchers often compare KPV and LL-37 when studying immune-related biological pathways.
GHK-Cu is commonly examined for its interaction with gene expression, cellular signaling, and tissue-associated molecular pathways, making it a useful comparative compound in peptide research.
This designation allows the use of research chemicals and peptides strictly for in vitro testing and research. It is to be handled by qualified and licensed professionals, in laboratory settings only.
Bodily introduction of any kind, into humans or animals, is strictly illegal by law.This product is NOT for human use and can be harmful if ingested. This product is not in a sterile solution. It is not a drug, food, or cosmetic.
This designation allows the use of research chemicals and peptides strictly for in vitro testing and research. It is to be handled by qualified and licensed professionals, in laboratory settings only.
Bodily introduction of any kind, into humans or animals, is strictly illegal by law.This product is NOT for human use and can be harmful if ingested. This product is not in a sterile solution. It is not a drug, food, or cosmetic.
Peptides should be stored properly to maintain their stability and effectiveness. Here are some general guidelines for storing peptides:
1. Lyophilized (Dry/Powder) Peptides:
Storage Temperature: Store at -20°C or -80°C. Lyophilized peptides are typically more stable at lower temperatures.
Avoid Moisture: Keep them in airtight containers to avoid moisture exposure, which can degrade peptides.
Expiration: Lyophilized peptides generally have a longer shelf life when stored properly (up to a year or more).
2. Reconstituted Peptides (in Solution):
Storage Temperature: If you’ve dissolved a peptide in a solvent (e.g., water, acetic acid, or another buffer), you should store it at 2–8°C (36–46°F)
Protect from Light: Peptides in solution can degrade when exposed to light, so store them in amber-colored vials or protect them from light using foil or opaque containers.
Stability: Once reconstituted, peptides are typically stable for a few days to a few weeks at 4°C, depending on the sequence and conditions, but freezing is often the safest option for long-term storage.
3. Special Considerations:
Buffer Choice: Ensure the peptide is dissolved in an appropriate buffer to maintain stability. Some peptides may degrade in certain solvents, so it’s essential to choose the right one.
Avoid Contamination: Always handle peptides with clean equipment (e.g., sterile vials, pipettes) to prevent contamination that could affect their stability.
Property
Value
Chemical Name
LL-37 / Cathelicidin Antimicrobial Peptide / hCAP18 C-Terminal Fragment
This designation allows the use of research chemicals and peptides strictly for in vitro testing and research. It is to be handled by qualified and licensed professionals, in laboratory settings only.
Bodily introduction of any kind, into humans or animals, is strictly illegal by law.This product is NOT for human use and can be harmful if ingested. This product is not in a sterile solution. It is not a drug, food, or cosmetic.
Each unit is prepared with attention to consistency. Packaging is sealed and reinforced to protect shipment integrity. In addition, we offer Protection Coverage at checkout as an additional option which covers lost or damaged packages ($3.99). We’ll re-ship or refund eligible orders once confirmed. For additional information please visit our Shipping Policy and tracking Info Page
We ship USPS Priority only
Ships same day M-F (before 4pm est cutoff)
Orders placed on a Federal holiday or weekend will be delivered on the next business day
Free shipping on orders over $150. This offer will be available based on post-discount order amount
Signature confirmation is offered at checkout for $19.99
Yes, we ship to PO Boxes
Tracking & Insurance (up to $100 via USPS) is included
Property
Value
Chemical Name
LL-37 / Cathelicidin Antimicrobial Peptide / hCAP18 C-Terminal Fragment
This designation allows the use of research chemicals and peptides strictly for in vitro testing and research. It is to be handled by qualified and licensed professionals, in laboratory settings only.
Bodily introduction of any kind, into humans or animals, is strictly illegal by law.This product is NOT for human use and can be harmful if ingested. This product is not in a sterile solution. It is not a drug, food, or cosmetic.
I. RESEARCH USE ONLY: Products are sold strictly for laboratory research and in-vitro testing, not for human or animal use. II. ASSUMPTION OF RISK: You assume all risk associated with these chemicals. III. LIABILITY: You agree to indemnify BCUltra LLC for any misuse, including human consumption. IV. COMPLIANCE: You certify you are 21+ & will handle these peptides & chems per all applicable law.
0 items
Order Before 4PM ET - Ships Same Day (Mon–Fri) Free Shipping on orders $150 +
New here? Take 10% off your first order with code WELCOME10 at checkout.
If you prefer to pay with credit card (Visa, Master Card, American Express, Discover) Apple Pay & Cash App, we now have that option available on our sister site: https://ultrapeptides.com/
We will be implementing this method of payment here shortly. Until then, Venmo and Crypto is still available. Thank you for your continued support and patience.
Order Before 4PM ET - Ships Same Day (Mon–Fri) 
Free Shipping on orders $150 +
LL 37 5mg
$67.79Original price was: $67.79.$49.79Current price is: $49.79.LL 37 5mg is formulated for precise research applications. At Ultra Peps, we prioritize consistency, reliability, and research-focused handling standards.
Description
LL-37 5mg is a human-derived antimicrobial peptide studied for its role in immune response, cellular repair, and host defense mechanisms. Additionally, researchers utilize LL-37 in controlled environments to examine how the body responds to microbial exposure, inflammatory signaling, and tissue-related biological processes.
Given its unique biological profile, LL-37 is currently the only known human cathelicidin peptide and participates in multiple pathways related to innate immunity and cellular communication. Furthermore, this peptide is expressed in several tissues and immune cell populations, including neutrophils, mast cells, and epithelial cells throughout the skin and respiratory tract. As a result, LL-37 remains a valuable research tool in studies involving immune signaling, barrier function, and tissue biology.
Mode of Action
LL-37 functions as a cationic host defense peptide that interacts with microbial membranes and immune signaling pathways. Like other cathelicidins, LL-37 displays broad-spectrum antimicrobial activity against bacteria, fungi, and some enveloped viruses.
In addition, this peptide can disrupt microbial cell membranes directly, which helps prevent pathogen survival. At the same time, LL-37 influences immune responses by modulating inflammatory signaling and recruiting immune cells to sites of tissue injury or infection.
Researchers have also observed that LL-37 can interact with DNA and RNA released from damaged cells, which may activate immune cells such as dendritic cells. In addition, this interaction plays a role in immune signaling and inflammatory responses observed in certain skin conditions.
Research Applications
This compound is commonly used in:
• Antimicrobial peptide investigations
• Immune signaling research
• Cellular communication studies
• Barrier function research
• Tissue biology investigations
• Peptide pharmacology research
• Advanced laboratory research applications
Related Research Compounds
Thymosin Alpha-1 (Tα1)
Thymosin Alpha-1 is one of the closest research compounds to LL-37 in terms of immune system signaling and host defense pathway investigations. Researchers frequently compare both peptides when studying immune-regulatory mechanisms.
BPC-157
BPC-157 is commonly studied in laboratory models involving cellular signaling, tissue biology, and molecular communication pathways. Researchers often investigate BPC-157 and LL-37 together to better understand complementary biological signaling mechanisms.
TB-500
TB-500 is frequently examined in studies involving cellular migration, tissue organization, and peptide-mediated signaling pathways. It serves as a useful comparative compound in tissue biology research.
KPV
KPV is commonly investigated for its role in immune signaling, inflammatory pathway regulation, and cellular communication. Researchers often compare KPV and LL-37 when studying immune-related biological pathways.
ARA-290
ARA-290 is frequently studied in laboratory investigations involving cellular communication, and tissue-related biological pathways.
GHK-Cu
GHK-Cu is commonly examined for its interaction with gene expression, cellular signaling, and tissue-associated molecular pathways, making it a useful comparative compound in peptide research.
Selected Literature
Read our Blog: What are Research Peptides?
Read our Blog: What Peptides Do in the Body: Understanding Their Role in Biological Research
Read our Blog: Understanding Peptide Half-Life in Research: Stability, Signaling, and Duration
Additional background on cathelicidin peptides: https://en.wikipedia.org/wiki/Cathelicidin
Chemical Details
THIS PRODUCT IS FOR RESEARCH ONLY
This designation allows the use of research chemicals and peptides strictly for in vitro testing and research. It is to be handled by qualified and licensed professionals, in laboratory settings only.
Bodily introduction of any kind, into humans or animals, is strictly illegal by law.This product is NOT for human use and can be harmful if ingested. This product is not in a sterile solution. It is not a drug, food, or cosmetic.
Please read our Terms and Conditions prior to ordering.
THIS PRODUCT IS FOR RESEARCH ONLY
This designation allows the use of research chemicals and peptides strictly for in vitro testing and research. It is to be handled by qualified and licensed professionals, in laboratory settings only.
Bodily introduction of any kind, into humans or animals, is strictly illegal by law.This product is NOT for human use and can be harmful if ingested. This product is not in a sterile solution. It is not a drug, food, or cosmetic.
Please read our Terms and Conditions prior to ordering.
Additional information
Solid (Powder)
White
5mg
Cathelicidins
Research Peptide
Ultra Peps
Peptides should be stored properly to maintain their stability and effectiveness. Here are some general guidelines for storing peptides:
1. Lyophilized (Dry/Powder) Peptides:
Storage Temperature: Store at -20°C or -80°C. Lyophilized peptides are typically more stable at lower temperatures.
Avoid Moisture: Keep them in airtight containers to avoid moisture exposure, which can degrade peptides.
Expiration: Lyophilized peptides generally have a longer shelf life when stored properly (up to a year or more).
2. Reconstituted Peptides (in Solution):
Storage Temperature: If you’ve dissolved a peptide in a solvent (e.g., water, acetic acid, or another buffer), you should store it at 2–8°C (36–46°F)
Protect from Light: Peptides in solution can degrade when exposed to light, so store them in amber-colored vials or protect them from light using foil or opaque containers.
Stability: Once reconstituted, peptides are typically stable for a few days to a few weeks at 4°C, depending on the sequence and conditions, but freezing is often the safest option for long-term storage.
3. Special Considerations:
Buffer Choice: Ensure the peptide is dissolved in an appropriate buffer to maintain stability. Some peptides may degrade in certain solvents, so it’s essential to choose the right one.
Avoid Contamination: Always handle peptides with clean equipment (e.g., sterile vials, pipettes) to prevent contamination that could affect their stability.
THIS PRODUCT IS FOR RESEARCH ONLY
This designation allows the use of research chemicals and peptides strictly for in vitro testing and research. It is to be handled by qualified and licensed professionals, in laboratory settings only.
Bodily introduction of any kind, into humans or animals, is strictly illegal by law.This product is NOT for human use and can be harmful if ingested. This product is not in a sterile solution. It is not a drug, food, or cosmetic.
Please read our Terms and Conditions prior to ordering.
Each unit is prepared with attention to consistency. Packaging is sealed and reinforced to protect shipment integrity. In addition, we offer Protection Coverage at checkout as an additional option which covers lost or damaged packages ($3.99). We’ll re-ship or refund eligible orders once confirmed. For additional information please visit our Shipping Policy and tracking Info Page
THIS PRODUCT IS FOR RESEARCH ONLY
This designation allows the use of research chemicals and peptides strictly for in vitro testing and research. It is to be handled by qualified and licensed professionals, in laboratory settings only.
Bodily introduction of any kind, into humans or animals, is strictly illegal by law.This product is NOT for human use and can be harmful if ingested. This product is not in a sterile solution. It is not a drug, food, or cosmetic.
Please read our Terms and Conditions prior to ordering.
Certificate of Analysis
View the Certificate of Analysis for this batch, provided by our testing lab.
Download COA (PDF)
You may also like…
Thymosin Beta 4 (TB 500) 5mg
$31.99 – $134.99Price range: $31.99 through $134.99 Select options This product has multiple variants. The options may be chosen on the product pageBPC 157 5mg
$34.99 – $145.99Price range: $34.99 through $145.99 Select options This product has multiple variants. The options may be chosen on the product pageEpithalon 10mg
$31.99 – $123.99Price range: $31.99 through $123.99 Select options This product has multiple variants. The options may be chosen on the product pageARA 290 5mg
$33.59 Add to cartGHK-Cu 100mg
$145.59 Add to cartRelated products
Melanotan 1 (MT-1) 10mg
$33.59Original price was: $33.59.$24.59Current price is: $24.59.AICAR 50mg
$55.99 Add to cartCJC 1295 NO DAC 5mg
$38.99 – $145.99Price range: $38.99 through $145.99 Select options This product has multiple variants. The options may be chosen on the product pageP21 50mg
$111.99Original price was: $111.99.$89.79Current price is: $89.79.