Piper nigrum extract · Black pepper extract · Bioperine
5–20 mg piperine · vegan · gluten-free · 60 caps
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Piperine is the standardized extract of black pepper (Piper nigrum) containing the alkaloid piperine. It is one of the most studied natural bioavailability enhancers, increasing the absorption of curcumin, resveratrol, and certain medications by inhibiting intestinal and hepatic glucuronidation.
Piperine inhibits UDP-glucuronosyltransferase enzymes in the liver and intestine, slowing the metabolism and excretion of compounds that undergo glucuronidation. It also inhibits P-glycoprotein and CYP3A4, increasing intestinal permeability and reducing first-pass metabolism. In humans, co-administration with curcumin increased bioavailability by approximately 2000%.
People taking curcumin, resveratrol, or other poorly absorbed supplements who want to enhance efficacy. Also used in some traditional digestive formulations.
Avoid if taking medications with narrow therapeutic windows metabolized by CYP3A4 or P-glycoprotein (phenytoin, propranolol, theophylline, cyclosporine, certain statins). Discontinue 2 weeks before surgery due to potential interaction with anesthesia and anticoagulants.
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✓ Timing follows the supplement being enhanced; typically morning or midday with curcumin.
✓ Timing follows the supplement being enhanced; typically morning or midday with curcumin.
✓ Timing follows the supplement being enhanced; typically morning or midday with curcumin.
✓ Fat-containing meals improve absorption of both piperine and lipophilic compounds like curcumin.
Piperine inhibits UDP-glucuronosyltransferase enzymes in the liver and intestine, slowing the metabolism and excretion of compounds that undergo glucuronidation.
Each bar = one cited trial. Effect varies by methodology, dose, and population.
Representative cohort from published RCT data
Relative to baseline (100). Data from published clinical literature.
see study
→ Co-administration of 20 mg piperine with 2 g curcumin increased human bioavailability by 2000% with no adverse effects observed.
see study
→ In rats, piperine increased serum curcumin concentration, lengthened time to peak, and decreased clearance and elimination half-life.
see study
→ Piperine co-administration significantly increased resveratrol bioavailability and delayed its elimination in a rat model.
B · Strong clinical and preclinical evidence for bioavailability enhancement of curcumin and certain other compounds. Drug interaction risk is real and clinically significant.
A plain-English read of the literature behind this supplement. Not a clinical recommendation.
Key citations: PMID 9619120, PMID 12064344, PMID 21535732
How to use Piperine specifically for poor nutrient absorption — the right dose, timing, blood markers to track, and how to know if it is working.
A clinical evidence review of Piperine — RCT data, effect sizes, evidence grade, and what the numbers mean for your specific situation.
Everything you need to know about Piperine — mechanism, dose, safety, buying guide for India, and what the research actually says.
SacredBod's longer take on Piperine — context the structured blocks above don't capture.
Piperine is the rare supplement ingredient that has been studied in humans with pharmacokinetic rigor usually reserved for pharmaceutical drugs. The alkaloid from black pepper — typically standardized as Bioperine or similar extracts — is not itself a therapeutic agent for most conditions, but a bioavailability enhancer that fundamentally changes how the body processes other compounds. Its primary value is making poorly absorbed supplements like curcumin clinically relevant.
The landmark study was published in 1998 in Planta Medica. Researchers gave healthy human volunteers 2 grams of curcumin alone, which produced undetectable or very low serum levels. When the same dose was combined with 20 mg of piperine, serum curcumin concentrations rose dramatically — the calculated increase in bioavailability was 2000%. Piperine achieved this by inhibiting hepatic and intestinal glucuronidation, the primary metabolic pathway that clears curcumin from the body. Subsequent studies confirmed this effect in rats and extended it to resveratrol, showing that piperine is a broad-spectrum absorption enhancer for polyphenols.
This pharmacological activity is a double-edged sword. The same enzyme inhibition that increases curcumin absorption also affects pharmaceutical drugs. Piperine inhibits CYP3A4 and P-glycoprotein, two of the most important drug-metabolizing and transport systems in the body. This means it can increase blood levels of phenytoin, propranolol, theophylline, cyclosporine, and certain statins — sometimes to toxic ranges. The interaction is not theoretical: multiple clinical pharmacokinetic studies have documented meaningful increases in drug exposure when co-administered with piperine.
For supplement users, this creates a clear decision framework. If you are not on interacting medications, piperine is a safe and effective way to increase the value of your curcumin or resveratrol supplement. If you are on any prescription drug with a narrow therapeutic window, or any drug metabolized by CYP3A4, piperine should be approached with caution and ideally discussed with a pharmacist or physician. The supplement industry often presents piperine as a harmless add-on; the pharmacology says otherwise.
Practical use is straightforward: 5–20 mg of a standardized piperine extract, taken concurrently with the target supplement and a meal containing some fat. Higher doses do not appear to increase enhancement further and may raise interaction risk. For curcumin specifically, the piperine combination has become the de facto standard formulation, offering a cost-effective alternative to liposomal or nanoparticle delivery systems.
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