Selank, a Russian-made protein fragment given as nasal drops, is used to ease anxiety without the drowsiness of standard sedatives. In people with diagnosed anxiety, two-week courses calmed symptoms, with mild harms and relief that lasted after stopping. Claims for sharper thinking, immune support, and healthy aging rest mainly on animal and laboratory work. Evidence is thin and almost entirely from its developers; long-term use and product quality remain uncertain. (Full Review)
| Marker | Target | Why |
|---|---|---|
| GAD-7 score | Below 5 (minimal anxiety) | Tracks main intended effect |
| Platelet count (CBC) | 175–350 ×10⁹/L | Bleeding-risk baseline |
| PT/INR | 0.9–1.1 (off anticoagulants) | Clotting baseline |
| ALT | 10–25 U/L | Liver baseline |
| eGFR | 90 mL/min/1.73 m² or higher | Kidney baseline |
| hs-CRP | Below 1.0 mg/L | Inflammation baseline given immune claims |
| Fasting glucose | 75–90 mg/dL | Tracks rat-derived metabolic claims |
Cadence: Baseline before starting; GAD-7 at day 7 and day 14 of each course and 1–3 weeks after it ends; INR at 1–2 weeks for anticoagulant users; repeat labs after the first course (about 4–6 weeks), then every 6–12 months while courses continue