Source comparison
Semax Amidate BDNF Protocol: Method Comparison
Intranasal (1mg/mL) 15–30 minutes 18–24 hours post-dose 100% (baseline reference) No injection required; rotate nostrils daily; requires head-tilt positioning Most efficient CNS delivery. Preferred for BDNF-focused protocols Subcutaneous injection 45–90 minute
This comparison does not assign a generated winner or score.
- Intranasal (1mg/mL)
- 15–30 minutes
- 18–24 hours post-dose
- 100% (baseline reference)
- No injection required; rotate nostrils daily; requires head-tilt positioning
- Most efficient CNS delivery. Preferred for BDNF-focused protocols
- Subcutaneous injection
- 45–90 minutes
- 20–26 hours post-dose
- 70–80% CNS bioavailability vs intranasal
- Standard insulin syringe technique; rotate abdominal sites; slower onset
- Viable alternative if nasal mucosa is compromised; requires 20–30% higher dose
- Oral administration (experimental)
- 90–180 minutes (inconsistent)
- Minimal. Hepatic first-pass degradation
- <10% reaches CNS intact
- Convenient but pharmacologically ineffective
- Not recommended. Peptide bond cleavage in GI tract eliminates BDNF activity