Understand the source comparison
Best Peptides for Anxiety: Evidence and Mechanism Comparison
Selank GABA-A receptor upregulation Panic disorder, acute episodic anxiety 600mcg–2.4mg/day intranasal or subcutaneous 10–14 days Multiple RCTs, moderate-quality evidence Semax BDNF elevation, neuroprotection GAD, chronic stress-related anxiety 300mcg–1mg/day
No winner is assigned.
This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- Selank
- GABA-A receptor upregulation
- Panic disorder, acute episodic anxiety
- 600mcg–2.4mg/day intranasal or subcutaneous
- 10–14 days
- Multiple RCTs, moderate-quality evidence
- Semax
- BDNF elevation, neuroprotection
- GAD, chronic stress-related anxiety
- 300mcg–1mg/day subcutaneous
- 14–21 days
- Limited human trials, strong preclinical data
- Thymalin
- HPA axis normalisation, immune modulation
- Anxiety tied to autoimmune or chronic inflammation
- 5–10mg intramuscular 2–3x/week
- 21–28 days
- Observational studies, limited RCT data
- Cerebrolysin
- Neurotrophic factor delivery (NGF, BDNF mimicry)
- Post-stroke anxiety, neurodegenerative-related anxiety
- 10ml intramuscular 3x/week
- Multiple RCTs in neurological populations
- P21
- Neurogenesis promotion via CREB pathway activation
- Anxiety with cognitive impairment
- 1–5mg subcutaneous 2–3x/week
- 21–30 days
- Preclinical only, no human trials
- Bottom Line
- Selank and Semax have the strongest human evidence for GABAergic and neurotrophic anxiolysis. Thymalin addresses immune-endocrine drivers. Cerebrolysin suits neurological anxiety. P21 remains experimental.