Almost every turmeric supplement mentions black pepper, and many quote a 2000% boost. That number is real, but it comes with a lot of fine print.
Written by Vita Globe Editorial Team | Reviewed against the original 1998 pharmacokinetic study, peer-reviewed reviews, NIH LiverTox and the UK Committee on Toxicity
Does black pepper really make turmeric work better?
Black pepper's active compound, piperine, can increase how much curcumin reaches your blood. In a 1998 study, taking 20mg piperine with 2g curcumin raised curcumin bioavailability by about 2000% in human volunteers[1]. But curcumin levels without piperine were barely detectable to begin with, so a big percentage still meant small absolute amounts. A 2024 UK expert review called the claim questionable, with high uncertainty[2].
Caveat: Better absorption isn't automatically better. Piperine also affects enzymes that process many medications[3], and piperine-enhanced products feature in turmeric liver injury reports[4].
Sources: Shoba et al., 1998 · UK COT, 2024 · Bhardwaj et al., 2002 · Verified 2026-09-27
IN THIS ARTICLE
Why is turmeric hard to absorb?
Curcumin, the most-studied compound in turmeric, has a well-known bioavailability problem. Reviews attribute it to three things: poor absorption from the gut, rapid metabolism, and rapid elimination[5]. In practice, even large oral doses produce low levels of curcumin in the blood[6].
That's the problem black pepper is meant to solve. For a broader look at how supplements get absorbed, see how supplements actually work in your body.
Where does the 2000% number come from?
It comes from a 1998 study by Shoba and colleagues, published in Planta Medica[1]. Researchers gave curcumin to rats and to a small group of healthy human volunteers, with and without piperine.
In the human part, volunteers took 2g of curcumin alone, and serum curcumin was either undetectable or very low. When the same dose was taken with 20mg of piperine, curcumin levels were much higher in the first hour, and the researchers calculated a 2000% increase in bioavailability[1]. Reviews since then have repeated that figure widely[5][6].
Here's the fine print that rarely makes it onto labels:
- Tiny starting point. When the baseline is close to zero, a large percentage increase can still mean a small absolute amount.
- Small study. The human arm involved only a small group of volunteers and measured blood levels, not health outcomes.
- Big doses. 2g of curcumin and 20mg of piperine are far larger than what most daily supplements provide.
What do experts say about the black pepper claim today?
In 2024, the UK Committee on Toxicity (COT) reviewed the safety of turmeric and curcumin supplements. It found that 10 of the 15 supplements it surveyed contained piperine, and concluded that the claim that piperine improves curcuminoid bioavailability is questionable, with high uncertainty[2].
That doesn't mean piperine does nothing. It means one old, small study has been asked to carry a lot of marketing weight. Newer formulation approaches, such as lipid-based and nanoparticle forms, have also been developed to tackle curcumin's absorption problem[6].
Is it safe to take turmeric with black pepper extract?
For most healthy people, the amounts in typical supplements are well tolerated. But there are two real reasons for caution.
Medications. In lab studies, piperine inhibited CYP3A4 and P-glycoprotein, two major pathways your body uses to process and clear many drugs[3]. The same effect that may raise curcumin levels could, in theory, raise levels of some medications. If you take prescription drugs, ask your pharmacist (see what not to mix with turmeric and ginger).
Liver injury. NIH's LiverTox database lists turmeric as a well-documented cause of liver injury and notes that formulations designed for higher bioavailability, including those with piperine, were subsequently linked to several cases[4]. In a US series of ten turmeric-related liver injury cases, three of the products tested also contained piperine[7]. The injury appears to be rare and linked to individual susceptibility, including a specific immune gene variant (HLA-B*35:01)[4][7]. See turmeric side effects for warning signs.
How much black pepper is in our gummies?
Our Turmeric, Ginger & Black Pepper Gummies contain 100mcg of black pepper extract (95% piperine) per two-gummy serving. That's a very different amount from the 20mg of piperine used in the 1998 study, so we don't claim a 2000% boost. We include black pepper as turmeric's traditional companion, not as a promise about blood levels.
The honest summary
- The 2000% figure comes from one small 1998 study using large doses of curcumin and piperine[1].
- Curcumin levels without piperine were barely detectable, so the absolute increase was small.
- A 2024 UK expert review called the bioavailability claim questionable[2].
- Piperine can affect drug metabolism[3] and appears in some turmeric liver injury reports[4][7]. Talk to your provider if you take medication or have liver concerns.
Want the difference between turmeric and curcumin? Read turmeric vs. curcumin.
Our option
Vita Globe Turmeric, Ginger & Black Pepper Gummies – 60ct
Each two-gummy serving provides 250mg turmeric extract (standardized to 95% curcuminoids), 12mg ginger root extract and 100mcg black pepper extract (95% piperine). Peach-flavored, vegan, non-GMO and gluten-free. We're upfront about the black pepper amount: it's included as turmeric's traditional partner, not as a 2000% promise.
Frequently asked questions
How much black pepper do you need with turmeric?
There's no established amount. The famous study used 20mg of piperine with 2g of curcumin[1], far more than most supplements contain.
Does turmeric work without black pepper?
Curcumin is poorly absorbed either way[5]. Black pepper may raise blood levels, but how much that matters for real-world results is uncertain[2].
Does adding black pepper to turmeric in food help?
Possibly a little, but the research used concentrated piperine doses, not a pinch of pepper. Cooking turmeric into meals is still a fine way to enjoy it.
Is piperine bad for your liver?
Piperine itself isn't established as a liver toxin, but high-bioavailability turmeric products, including those with piperine, feature in liver injury reports[4].
What is piperine?
Piperine is the main pungent compound in black pepper. It's the ingredient studied for its effect on curcumin absorption[1].
Sources
- Shoba G, Joy D, Joseph T, Majeed M, Rajendran R, Srinivas PS. Influence of piperine on the pharmacokinetics of curcumin in animals and human volunteers. Planta Med. 1998;64(4):353-356. doi:10.1055/s-2006-957450
- Committee on Toxicity of Chemicals in Food, Consumer Products and the Environment (COT). Statement on the potential risk to human health of turmeric and curcumin supplements. COT Statement 2024/07. December 2024. cot.food.gov.uk
- Bhardwaj RK, Glaeser H, Becquemont L, Klotz U, Gupta SK, Fromm MF. Piperine, a major constituent of black pepper, inhibits human P-glycoprotein and CYP3A4. J Pharmacol Exp Ther. 2002;302(2):645-650. doi:10.1124/jpet.102.034728
- LiverTox: Clinical and Research Information on Drug-Induced Liver Injury. Turmeric. Bethesda (MD): National Institute of Diabetes and Digestive and Kidney Diseases; updated June 16, 2025. ncbi.nlm.nih.gov/books/NBK548561
- Hewlings SJ, Kalman DS. Curcumin: a review of its effects on human health. Foods. 2017;6(10):92. doi:10.3390/foods6100092
- Anand P, Kunnumakkara AB, Newman RA, Aggarwal BB. Bioavailability of curcumin: problems and promises. Mol Pharm. 2007;4(6):807-818. doi:10.1021/mp700113r
- Halegoua-DeMarzio D, Navarro V, Ahmad J, et al. Liver injury associated with turmeric—a growing problem: ten cases from the Drug-Induced Liver Injury Network [DILIN]. Am J Med. 2023;136:200-206. doi:10.1016/j.amjmed.2022.09.026
About the Vita Globe Editorial Team
The Vita Globe Editorial Team researches and writes our wellness content, working from peer-reviewed research, systematic reviews and guidance from bodies such as the NIH and the FDA. We cite our sources inline and update articles when the evidence changes.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for informational purposes only and is not a substitute for medical advice. Talk to your healthcare provider before starting any new supplement, particularly if you are pregnant, nursing, taking medication, or caring for a child.
