Sage is a culinary herb with drug-like activity. One dose of standardized leaf extract briefly sharpens memory and attention; daily extract improves blood sugar and blood fats, though almost all from one research group. Menopausal hot flush relief is plausible; combined results are unstable and the strongest trials were company-funded. Leaf preparations are well tolerated; concentrated oil can cause convulsions. (Full Review)
| Marker | Target | Why |
|---|---|---|
| Fasting glucose | 75–85 mg/dL | Primary target; also detects an excessive drop |
| Glycated hemoglobin | 4.8–5.2% | Confirms the glucose change is sustained, not a single reading |
| Fasting lipid panel | Triglycerides under 80 mg/dL; HDL above 55 mg/dL (men) or 65 (women); triglyceride-to-HDL ratio under 2 | Sage's most consistently replicated metabolic effect |
| Fasting insulin and HOMA-IR | Insulin under 5 µIU/mL; HOMA-IR under 1.5 | Detects the insulin-sensitivity effect before glucose moves |
| ALT and AST | 10–26 U/L each | Herb safety screen; sage trials showed no change, so any rise is unexpected |
| Creatinine with eGFR | eGFR above 90 mL/min/1.73 m² | Confirms unchanged kidney handling, as trials reported |
| Blood pressure, seated and standing | Under 120/80 mmHg seated, with no fall greater than 20/10 mmHg on standing | Both a fall and a rise have been reported, so direction is unpredictable |
| Thyroid-stimulating hormone | 1.0–2.0 mIU/L | Excludes a thyroid cause of the sweating and fatigue sage is taken for |
| Cognitive test score | No established target; track the change from the individual's own baseline instead | The only way to judge the cognitive claim personally rather than statistically |
Cadence: Baseline panel before starting; blood pressure and symptoms weekly for the first four weeks; metabolic and liver panel repeated at 8 to 12 weeks, then every 6 to 12 months while use continues; cognition retested at 12 weeks with an alternate test version.