Piperine, the active compound in black pepper, is best proven as an absorption booster that greatly increases uptake of substances taken with it, most notably curcumin. Paired with curcumin it modestly improves cholesterol and inflammation. Its standalone health claims remain unproven. Its main hazard: slowing drug breakdown can raise medications to harmful levels. (Full Review)

Protocol

Standard Dose

~5 mg

Standardized piperine (e.g., BioPerine) per dose, as an add-on

Dose Range

5–20 mg

Per intake; up to ~15 mg/day in divided doses

How to Take

With food

Paired with the target compound (curcumin, resveratrol, CoQ10)

Time to effect

Absorption Boost

Acute

Applies to whatever is co-ingested; over the hours after dosing

Lipid & Inflammation Markers

8–12 weeks

Reassess markers when paired with curcumin

Benefits

High: Enhanced bioavailability of co-administered nutrients and drugs

Medium: Improved blood lipid profile; antioxidant and anti-inflammatory support

Low: Glycemic control; digestive enzyme stimulation and nutrient absorption; metabolic rate and weight management

Speculative: Neuroprotection and cognitive support; longevity and healthspan modulation; anticancer and chemopreventive activity

Contraindications

Narrow-therapeutic-index drugs (phenytoin, warfarin, digoxin, immunosuppressants)

Significant liver impairment (Child-Pugh Class B or C)

Active peptic ulcers or bleeding disorders

Within 1–2 weeks of scheduled surgery

Pregnancy or trying to conceive

Key Interactions

Prescription drugs (phenytoin, carbamazepine, propranolol, theophylline, rifampicin, cyclosporine, tacrolimus, digoxin)

Over-the-counter drugs (ibuprofen, aspirin, fexofenadine)

Supplements (curcumin, resveratrol, CoQ10, beta-carotene, selenium, vitamin B6)

Antiplatelet/anticoagulant supplements (fish oil, ginkgo, garlic extract, high-dose vitamin E)

Caffeine and alcohol

Risk & Side Effects

High: Drug interactions via enzyme and transporter inhibition

Medium: Gastrointestinal irritation

Low: Increased bleeding tendency; reproductive and hormonal effects

Speculative: Genotoxicity and high-dose toxicity concerns; pregnancy-related risk

Monitoring

Marker	Target	Why
ALT	Men <25 U/L; Women <20 U/L	Liver metabolic reserve; governs interaction risk
hs-CRP	<1.0 mg/L	Anti-inflammatory benefit when paired with curcumin
LDL-C	<100 mg/dL	Lipid benefit of curcumin–piperine
HbA1c	<5.4%	Monitors the conflicted glycemic signal
Platelet count & coagulation (PT/INR)	Platelets 150–400 ×10⁹/L; INR per drug target	Detects additive bleeding risk
Therapeutic drug level (e.g., phenytoin, theophylline)	Within each drug's therapeutic window	Directly detects piperine-driven rises in interacting drugs

Cadence: Reassess markers at ~8–12 weeks, then every 6–12 months; for an interacting prescription drug, check the drug level within 1–2 weeks of starting and after any dose change.

Qualitative Assessment

Enhanced-compound response: the target compound's intended effect (e.g., joint comfort with curcumin) is more noticeable than before
Digestive comfort: absence of burning, reflux, or stomach upset
Energy and well-being: stable energy without jitteriness
No signs of drug over-effect: no new dizziness, excessive drug effects, or unusual bruising or bleeding

Piperine for Health & Longevity

Protocol

Benefits

Risk & Side Effects

Monitoring

Qualitative Assessment