Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| BPC-157 (Oral Stable Form) | Selank | |
|---|---|---|
| Category | Peptides | Peptides |
| Standard Dose | Research indicates 250-500 mcg twice daily via oral capsule on empty stomach. | Research indicates 250-500 mcg daily via intranasal administration (0.15% solution, 2-3 drops per nostril). |
| Timing | On empty stomach, 30 minutes before meals. Twice daily dosing (morning and evening) provides consistent levels. | Can be dosed morning through evening. Unlike Semax, Selank is calming and can be used at night. |
| Cycle Duration | 4-12 weeks. Oral form enables easier long-term use compared to injectable. | 14-21 day cycles with equal rest periods. |
| Evidence Level | animal_plus_anecdotal | moderate_human |
Oral-stable BPC-157, typically formulated as the arginate salt, retains the same mechanism as standard BPC-157 — promoting angiogenesis via VEGFR2/PI3K/Akt/eNOS and Src-Caveolin-1-eNOS pathways, enhancing nitric oxide production, and stimulating tendon fibroblast growth and collagen formation. The arginate salt provides a protective buffer against gastric acid degradation, maintaining peptide integrity across a wider pH range. BPC-157 demonstrates remarkable native stability in human gastric juice (24+ hours), and the arginate form reportedly achieves 7-fold greater oral bioavailability compared to the acetate salt in preclinical studies.
Research indicates 250-500 mcg twice daily via oral capsule on empty stomach.
On empty stomach, 30 minutes before meals. Twice daily dosing (morning and evening) provides consistent levels.
4-12 weeks. Oral form enables easier long-term use compared to injectable.
Selank (Thr-Lys-Pro-Arg-Pro-Gly-Pro) is a synthetic heptapeptide analog of the immunomodulatory peptide tuftsin (from IgG heavy chain) with a Pro-Gly-Pro extension for metabolic stability. It allosterically modulates GABA-A receptors, enhancing GABA binding and GABAergic neurotransmission. Selank modifies mRNA levels of 84 genes involved in GABAergic neurotransmission in the frontal cortex, enhances enkephalinase inhibition (increasing endogenous enkephalin levels), and modulates serotonergic and noradrenergic systems to produce anxiolytic and nootropic effects.
Research indicates 250-500 mcg daily via intranasal administration (0.15% solution, 2-3 drops per nostril).
Can be dosed morning through evening. Unlike Semax, Selank is calming and can be used at night.
14-21 day cycles with equal rest periods.
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