PE-22-28 is a laboratory-made peptide, sold online and by private clinics for mood and brain function. It is designed to block one channel that keeps nerve cells quiet. Every claimed benefit — faster mood-related change, new brain cells, stroke recovery, protection of insulin-producing cells — rests on mice, rats and cultured cells, almost all from the patent-holding laboratory. No benefit or risk has been measured in people. Supply is unregulated. (Full Review)
| Marker | Target | Why |
|---|---|---|
| Fasting plasma glucose | 70–99 mg/dL | Safety check: a fall below range stops or reduces use |
| Fasting insulin | 2.6–24.9 µIU/mL | Safety check: a rise above range with falling glucose signals the insulin-release effect |
| Resting 12-lead electrocardiogram | No established target; tracked against the individual's own pre-exposure recording | Safety check: a new slow rate, pause or conduction change stops use |
| Intraocular pressure | 10–21 mmHg | Safety check: a rise above range stops use |
Cadence: Baseline, at four weeks, then every three to six months during exposure; fasting glucose and insulin sooner if low blood sugar symptoms appear. Intervals reflect common practice for an unstudied compound, not a trial.