Yohimbine, a stimulant tree-bark compound sold as a supplement for fat loss and male sexual performance, removes a natural brake on fight-or-flight signals. In men with erection problems, studies show real but modest improvement; it also raises standing blood pressure when automatic blood-pressure nerves fail. Fat-loss evidence is thin. Anxiety, panic, blood-pressure and heart-rate rises are well documented. For longevity-minded adults, value rests on narrow uses, not general health benefit. (Full Review)
| Marker | Target | Why |
|---|---|---|
| Resting blood pressure | Below 120/80 mmHg | Detects pressure rise |
| Standing blood pressure | Drop under 20/10 mmHg | Detects postural drop; tracks benefit |
| Resting heart rate | 50–70 beats/min | Detects stimulant excess |
| ECG | Normal sinus rhythm; QTc under 440 ms (men), 460 ms (women) | Baseline rhythm check |
| Fasting glucose | 75–90 mg/dL | Yohimbine alters insulin release |
| ALT | Below 25 U/L | Liver clears yohimbine |
| eGFR | Above 90 mL/min/1.73 m² | Kidney injury case reports |
| CYP2D6 genotype | Normal metabolizer | Predicts blood levels |
| Body composition (DEXA) | No established target; track change from own baseline | Measures fat-loss effect |
| Erectile function (IIEF-5) | 22–25 points | Tracks sexual benefit |
| Anxiety (GAD-7) | 0–4 points | Detects anxiety side effects |
Cadence: Home blood pressure and heart rate before and 60 minutes after the first doses, then weekly for 4 weeks, then monthly; questionnaires at 4 and 8 weeks; body composition at 8–12 weeks; liver and kidney tests every 6–12 months during long-term use