Alpha-Defensin vs NA-Selank Amidate

A detailed comparison to help you understand the differences and choose the right peptide for your research goals.

Alpha-Defensin

Alpha-defensins are small cationic peptides that are key components of the innate immune system. They have broad-spectrum antimicrobial activity against bacteria, fungi, and some viruses.

Full details →

NA-Selank Amidate

NA-Selank Amidate (N-Acetyl Selank Amidate) is an enhanced version of Selank with improved stability and blood-brain barrier penetration. The modifications increase bioavailability and duration of cognitive and anxiolytic effects.

Full details →

Side-by-Side Comparison

Aspect	Alpha-Defensin	NA-Selank Amidate
Dose Range	100 mcg–500 mcg	300 mcg–900 mcg
Frequency	1x daily	2x daily
Cycle Length	2–4 weeks	2–4 weeks
Route	subcutaneous	intranasal
Mechanism	Insert into microbial membranes to form pores, leading to cell death. Also have immunomodulatory effects including chemotaxis of immune cells and cytokine modulation.	Same core mechanism as Selank - modulates BDNF, serotonin, and norepinephrine systems. The N-acetyl group improves membrane permeability while the amidate modification increases enzymatic stability.
Typical Dosage	Research compound - dosing varies by application. Typically studied in laboratory and early clinical research settings rather than for general use.	Intranasal: 100-400mcg 1-3 times daily. Lower doses needed compared to standard Selank due to enhanced bioavailability.
Administration	Various routes studied including topical, local injection, and systemic administration depending on application.	Primarily intranasal administration. Can be used sublingually. More stable in solution than standard Selank.
Side Effects	Limited human use data. May cause local inflammation. Potential for immune activation effects.	Generally well-tolerated. Possible mild fatigue or nasal irritation. Less frequent dosing needed than standard Selank.
Best For	Recovery & Healing Immune Support	Cognitive Performance Immune Support