LL-37 (Cathelicidin) vs NA-Semax Amidate
A detailed comparison to help you understand the differences and choose the right peptide for your research goals.
LL-37 (Cathelicidin)
LL-37 is the only human cathelicidin antimicrobial peptide. It plays crucial roles in innate immunity and has shown diverse biological activities including antimicrobial, immunomodulatory, and wound healing properties.
Full details →NA-Semax Amidate
NA-Semax Amidate (N-Acetyl Semax Amidate) is a modified version of Semax with enhanced stability and potency. Also known as NASA, it provides stronger and longer-lasting nootropic effects than standard Semax.
Full details →Side-by-Side Comparison
| Aspect | LL-37 (Cathelicidin) | NA-Semax Amidate |
|---|---|---|
| Dose Range | 500 mcg–1.6 mg | 300 mcg–600 mcg |
| Frequency | 1x daily | 2x daily |
| Cycle Length | 2–4 weeks | 2–4 weeks |
| Route | topical | intranasal |
| Mechanism | Disrupts bacterial membranes, neutralizes endotoxins, modulates immune cell function, and promotes wound healing. Has both direct antimicrobial and immunomodulatory effects. | Maintains Semax's core actions on BDNF, NGF, and monoamine systems with improved pharmacokinetics. The modifications enhance CNS penetration and extend duration of action. |
| Typical Dosage | Research protocols vary widely. Typical ranges: 50-200mcg administered subcutaneously 2-3 times weekly. Some protocols use higher doses for acute infections. | Intranasal: 100-600mcg 1-2 times daily. Start with lower doses as it's more potent than standard Semax. |
| Administration | Subcutaneous injection. Can cause significant injection site reactions. Often used in conjunction with other immune-supporting protocols. | Intranasal spray is most common. Can be used sublingually. More stable than standard Semax in solution. |
| Side Effects | Injection site pain and reactions are common. May cause flu-like symptoms, temporary fatigue, or immune activation responses. | May cause irritability, hair shedding (rare), or overstimulation at high doses. Generally well-tolerated. |
| Best For |
Key Differences
Unique to LL-37 (Cathelicidin):
Unique to NA-Semax Amidate:
Key Studies
LL-37 (Cathelicidin)
- Cathelicidin LL-37 Expression in Human Breast Implant Capsules.
Plastic and reconstructive surgery, 2024
- Salivary Cathelicidin (LL-37) in Children and Adolescents Living with HIV.
Biomedicine hub, 2024
- Antifungal properties of cathelicidin LL-37: current knowledge and future research directions.
World journal of microbiology & biotechnology, 2023
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