Black pepper's active compound, piperine, is less a standalone remedy than a tool that sharply boosts the body's uptake of other compounds — most reliably turmeric's active ingredient. Its own effects on cholesterol, inflammation, and blood sugar are modest and unsettled. Its main hazard is raising prescription-drug levels, especially in older adults taking several medications. (Full Review)
| Marker | Target | Why |
|---|---|---|
| ALT (alanine aminotransferase) | ~10–26 U/L | Detects liver stress from long-term high-dose use |
| AST (aspartate aminotransferase) | ~10–26 U/L | Complements ALT for liver-cell health |
| Lipid panel (total, LDL, HDL, triglycerides) | LDL <100 mg/dL; triglycerides <90 mg/dL | Tracks the modest cardiometabolic effect when piperine is paired with curcumin |
| hs-CRP (high-sensitivity C-reactive protein) | <1.0 mg/L | Gauges the anti-inflammatory signal |
| Fasting glucose | 70–90 mg/dL | Monitors any glycemic effect in at-risk users |
| Interacting drug levels (e.g., phenytoin) | Drug-specific therapeutic range | Guards against piperine-driven over-exposure |
Cadence: Baseline before regular high-dose use; recheck liver enzymes at ~3 months, then every 6–12 months; more frequent checks if an interacting drug is involved