QSC LL-37 5mg | 20-Vial Kit | 100mg total | Antimicrobial Peptide Kit

Recent PubMed Research on LL-37

• LL-37 antimicrobial peptide: Molecular characterisation and its role in oral health and disease-A narrative review. (2026)
• Low-dose lipopolysaccharide pretreatment enhanced the proliferation and antibacterial activity of human adipose-derived mesenchymal stem cells. (2026)
• The dysregulation of innate immunity by Porphyromonas gingivalis in the etiology of Alzheimer's disease. (2026)

Disclaimer & Storage Guide

All QSC (Qingdao Sigma Chemical) products are strictly for laboratory, scientific, and research use only. They are not for human consumption, medical treatment, diagnosis, or disease prevention.

By purchasing or using QSC peptides, you acknowledge and agree that:

• You are a qualified researcher or acting under supervision of one.
• Products will only be used for legitimate research purposes.
• Products are not evaluated by the FDA or any regulatory authority for human use.
• You assume all responsibility for legal compliance, proper handling, and storage.
• You meet the legal age requirement in your jurisdiction.

No Warranty: Products are sold “as is,” with no express or implied warranties regarding efficacy, safety, or suitability. Results in research may vary, and QSC is not responsible for outcomes, interpretations, or conclusions drawn from studies.

General Safety & Handling

• Not for Human Use: Peptides are for research only. Off-label or personal use is at your own risk.
• PPE Required: Always use appropriate personal protective equipment when handling peptides.
• Storage Compliance: Follow recommended storage conditions to maintain integrity and prevent degradation.
• Disposal: Dispose of all materials according to institutional biosafety and hazardous waste protocols.
• Verify Quality: COAs are available on each product page for identity, purity (>99%), and batch consistency.

Peptide Storage Guidelines

General Rules for All Peptides

• Protect from light: Store in opaque containers or dark environments.
• Minimize moisture: Use airtight containers with desiccant when needed.
• Maintain stable temperature: Avoid freeze-thaw cycles.
• Handle carefully with sterile equipment to prevent contamination.

Lyophilized Peptides (Freeze-Dried Powder)

Unopened:

• Long-term: -20°C (-4°F); Short-term: 2–8°C (36–46°F) up to 6 months
• Store sealed with desiccant and protected from light

Reconstituted:

• Refrigerate at 2–8°C (36–46°F), use within 2–4 weeks
• For longer storage, aliquot and freeze at -20°C, thaw only what you need
• Avoid shaking or vigorous mixing

Liquid Peptides (Non-Lyophilized)

• Refrigerate at 2–8°C unless otherwise specified
• Use within 1–6 months; do not freeze unless indicated
• Keep in sealed, sterile, opaque container

Peptide Blends

• Store unopened: 2–8°C short-term; -20°C long-term
• Reconstituted: 2–8°C for 2–4 weeks; freeze aliquots for longer storage
• Stability may vary; follow product-specific instructions

Peptide Tablets

• Room temperature (15–25°C / 59–77°F) in cool, dry place
• Keep sealed and away from light
• Follow expiration dates; do not refrigerate or freeze unless instructed

Transport Tips: Use insulated packaging with ice packs for lyophilized or liquid peptides.

Legal & Regulatory Compliance

• Peptides are sold for research purposes only.
• Purchasers are responsible for compliance with all local, state, and federal laws.
• Some peptides may be controlled substances in certain jurisdictions.
• Institutional approvals (IRB, IACUC, biosafety) may be required.
• Export/import regulations vary; purchaser assumes all responsibility.

Research Applications Disclaimer

• Listed applications are based on scientific literature and are for informational purposes only.
• QSC does not provide protocol guidance or endorse specific research studies.
• Outcomes may vary by experimental conditions and may not translate to in vivo or human systems.

For Technical Support, COA Requests, or Product Information:
Email: support@qsc-usa.com
Response time: 24–48 hours