NA-Selank Amidate vs Substance P

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

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.

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Substance P

Substance P is an 11-amino acid neuropeptide involved in pain transmission, inflammation, and various neurological processes. While not used therapeutically itself, understanding it is crucial for pain research.

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Side-by-Side Comparison

Aspect	NA-Selank Amidate	Substance P
Dose Range	300 mcg–900 mcg	35 mcg–350 mcg
Frequency	2x daily	1x daily
Cycle Length	2–4 weeks	1 weeks
Route	intranasal	subcutaneous
Mechanism	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.	Binds primarily to NK1 receptors to transmit pain signals from peripheral nerves to the CNS. Also promotes inflammation, causes vasodilation, and stimulates immune cells.
Typical Dosage	Intranasal: 100-400mcg 1-3 times daily. Lower doses needed compared to standard Selank due to enhanced bioavailability.	Not used as a therapeutic agent. NK1 receptor antagonists (blocking Substance P) are used clinically for chemotherapy-induced nausea.
Administration	Primarily intranasal administration. Can be used sublingually. More stable in solution than standard Selank.	Research compound only. Therapeutic applications focus on blocking rather than administering Substance P.
Side Effects	Generally well-tolerated. Possible mild fatigue or nasal irritation. Less frequent dosing needed than standard Selank.	Administration would cause pain, inflammation, and neurogenic responses. Not given therapeutically.
Best For	Cognitive Performance Immune Support	Cognitive Performance