Olive leaf extract is a concentrated preparation from olive-tree leaves with a long traditional history. Its best-supported benefit is a modest lowering of blood pressure, clearest in people who already have raised pressure and at higher doses. Benefits for blood sugar, inflammation, weight, and brain aging remain unproven. It is inexpensive, widely available, and generally well tolerated. (Full Review)
| Marker | Target | Why |
|---|---|---|
| Blood pressure (systolic/diastolic) | ~110–120 / 70–80 mmHg | Tracks the primary, best-supported effect |
| Fasting glucose | 75–90 mg/dL | Detects any glycemic effect and additive hypoglycemia risk |
| Glycated hemoglobin (HbA1c) | <5.3% | Captures longer-term average blood sugar |
| LDL cholesterol | <80–100 mg/dL | Monitors the extract's variable lipid effect |
| Triglycerides | <80 mg/dL | Most responsive lipid to olive leaf extract |
| High-sensitivity C-reactive protein (hs-CRP) | <1.0 mg/L | Gauges the uncertain anti-inflammatory effect |
| Liver enzymes (ALT/AST) | ALT <25 U/L | Confirms hepatic safety |
| Kidney function (eGFR) | >90 mL/min/1.73m² | Confirms renal safety |
Cadence: Recheck blood pressure at home over the first 1–8 weeks, then repeat the blood panel at about 3 months and thereafter every 6–12 months if use continues.