This Popular Supplement Could Be Hurting Your Liver: What to Know About Turmeric

Turmeric and curcumin supplements have been linked to rare cases of liver injury. The risk and appears to be uncommon and may be influenced by the supplement’s formulation, absorption, and individual factors. Turmeric used in food is a different exposure from concentrated supplements.

“Natural” often sounds like another word for “safe.” But that is not always true. Turmeric is a good example. The spice has been used in food and traditional medicine for centuries. Yet concentrated turmeric and curcumin supplements have been linked to cases of liver injury.

This does not mean that everyone who takes turmeric will develop liver problems. The reported risk appears to be rare and may depend on the formulation and the individual.  

So, what is behind the concern? This article looks at the evidence on turmeric supplements and liver damage, possible risk factors, warning signs, and practical ways to use supplements more safely. 

Can Turmeric Supplements Cause Liver Damage? 

Yes. Turmeric and curcumin supplements have been linked to liver injury in a small number of people. However, this appears to be uncommon.  

The evidence comes mainly from case reports and liver-injury registries rather than large clinical trials designed to measure liver toxicity. 

One important example is the U.S. Drug-Induced Liver Injury Network (DILIN). Researchers identified 10 cases of turmeric-associated liver injury between 2004 and 2022. Of those 10 people, 5 required hospitalization, and 1 developed acute liver failure and died. The cases were considered clinically significant, but they should not be interpreted as the risk for everyone who takes turmeric. 1 

LiverTox, a resource from the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), describes clinically apparent turmeric-related liver injury as very rare. Its estimated incidence is roughly 1 case per 10,000 to 100,000 people exposed, although the true rate is uncertain. 2 

Turmeric in Food vs. Turmeric Supplements 

Here is the key distinction: a spice and a concentrated supplement are not the same exposure. 

Turmeric used in cooking contains a relatively small amount of curcuminoids. Supplements can instead provide concentrated turmeric extracts or purified curcumin. 

Some supplements also contain ingredients designed to increase absorption. Piperine, a compound found in black pepper, is one example 

Therefore, the fact that turmeric is commonly eaten does not automatically mean every concentrated turmeric formulation has the same safety profile. 

What Does Supplement-Related Liver Injury Mean? 

Supplement-related liver injury is generally called drug-induced liver injury (DILI) when a medication, herbal product, or dietary supplement causes biochemical or clinical evidence of liver damage after other causes have been considered.  

Importantly, liver injury does not always cause obvious symptoms at first. Some people may only show abnormal liver enzymes on blood tests.

What Does the Evidence Show? 

Let's take a broader look at this through the table below 

The takeaway is simple: turmeric-related liver injury is documented, but it is not a routine outcome of turmeric use. The strongest concern is concentrated supplement exposure, particularly some formulations designed to increase absorption. 

Why Might Some Turmeric Supplements Affect the Liver? 

The exact reason is still being studied. However, three factors stand out: concentration, absorption, and individual susceptibility. 

Concentrated Curcumin Doses 

Supplements can deliver far more concentrated amounts of curcuminoids than normal culinary use. 

That matters because the body is not exposed to turmeric in exactly the same way when a concentrated extract is taken regularly. LiverTox notes that many reported cases involved turmeric products containing relatively high amounts of curcumin. 

In other words, more concentrated does not automatically mean more dangerous, but it does create a different exposure from adding turmeric to a meal. 

High-Bioavailability Formulations 

Curcumin although an antioxidant is naturally absorbed poorly. That is why some supplements are formulated to improve its bioavailability. Piperine is one common example.  

In a human pharmacokinetic study, adding piperine substantially increased curcumin bioavailability compared with curcumin alone. This creates an important distinction. 5 

Better absorption can change exposure. 

The concern is not that every absorption-enhanced product will cause liver injury. Rather, several reported liver-injury cases have involved highly bioavailable formulations.  

Individual Risk Factors 

Individual susceptibility may also matter. 

The DILIN case series found that 7 of 10 patients carried the genetic variant HLA-B*35:01. This was much more common than in population controls. The finding suggests that genetics may contribute to susceptibility in some people.  

However, this does not mean that carrying the variant guarantees liver injury. 

Existing liver disease and the use of multiple medicines or supplements can also complicate the assessment of liver injury. A healthcare professional may need to consider all exposures rather than blaming a single product automatically.

What Are the Warning Signs of Turmeric-Related Liver Injury? 

Turmeric-related liver injury can cause symptoms that look similar to other forms of liver inflammation or injury. 

Watch for: 

These symptoms can have many causes. They do not prove that turmeric is responsible. However, they should not be ignored, particularly if they appear after starting a new supplement.  

For example, dark urine and jaundice can occur when bilirubin builds up because of liver or bile-related problems. 

If you develop symptoms that could indicate liver injury, stop taking the turmeric or curcumin product and contact a healthcare professional promptly. NCCIH specifically advises stopping turmeric or curcumin products and speaking with a healthcare provider if symptoms such as fatigue, nausea, poor appetite, dark urine, or jaundice occur. 6 

How Can You Use Turmeric Supplements Safely? 

There is no single turmeric dose that can be declared universally safe for every person. Instead, focus on what you are taking, why you are taking it, and what else you take with it. 

1. Check the Label 

Look beyond the word “turmeric.” 

Check whether the product contains: 

Formulations can differ substantially. So, two products marketed as “curcumin” may not create the same exposure.  

2. Do Not Assume “Natural” Means Risk-Free 

Natural products can have biological effects. 

In fact, the American Association for the Study of Liver Diseases recognizes herbal and dietary supplements as potential causes of drug-induced liver injury. Establishing the cause can be difficult because people may take several products at once. 7 

Therefore, treat supplements with the same basic caution you would use with other active products. 

3. Be Careful With Supplement Stacking 

Taking several supplements at once makes it harder to identify the cause if a problem develops. 

It can also increase the number of ingredients your liver has to process. 

Keep a record of the supplements you take. Include the brand, formulation, dose on the label, and when you started using it. 

4. Talk to a Healthcare Professional When Appropriate 

If you take prescription medicines, have liver disease, or use several supplements, discuss turmeric supplementation with a healthcare professional. 

This is especially useful before starting a concentrated or absorption-enhanced formulation. 

5. Know the Warning Signs 

Finally, know what to watch for. Fatigue alone is not enough to diagnose liver injury. But symptoms such as dark urine, pale stools, jaundice, persistent nausea, poor appetite, or itching deserve medical attention when they occur after starting a supplement.  

Bottomline 

Turmeric is not something everyone needs to fear. The important point is context. 

Turmeric used as a culinary spice is different from a concentrated curcumin supplement. Some supplements are also designed to increase absorption. In rare cases, these products have been associated with clinically significant liver injury.  

The evidence is still evolving. However, the signal is strong enough that turmeric supplements should not be treated as automatically risk-free simply because they are natural. 

Before taking one, check the formulation. Consider what other medicines and supplements you use. If you have liver disease, discuss it with a healthcare professional. 

Most importantly, know the warning signs. Dark urine, pale stools, jaundice, unusual fatigue, nausea, poor appetite, or itching after starting a turmeric supplement should not be brushed aside. A little label-checking can go a long way when it comes to supplement safety. 

Frequently Asked Questions 

1. Can turmeric hurt your liver? 

Yes. Turmeric and curcumin supplements have been linked to rare cases of clinically apparent liver injury. The concern is mainly associated with concentrated supplement use, and some reported cases involved formulations designed to increase curcumin absorption.

That does not mean turmeric routinely damages the liver. Most people who use turmeric will not develop liver injury. 

2. Is turmeric bad for your liver and kidneys? 

The strongest established concern with turmeric supplements is liver injury, not a general claim that turmeric damages both organs. 

Kidney problems can occur for many different reasons. Some forms of supplement toxicity may also affect kidney function, but that should not be confused with the specific evidence linking certain turmeric products to liver injury.  

If you have kidney or liver disease, discuss supplementation with a healthcare professional. 

3. How much turmeric is too much for the liver? 

There is no single universal amount that can be called “too much” for every person. 

Risk may depend on the product, concentration, formulation, duration of use, other ingredients, medications, and individual susceptibility. Some reported cases involved high-bioavailability products, but liver injury has also been reported with other turmeric preparations. So, a simple gram-based toxicity threshold would give a false sense of certainty. 

4. Are there other supplements that can hurt your liver? 

Yes. Turmeric is not the only supplement associated with liver injury. 

The American Association for the Study of Liver Diseases notes that numerous herbal and dietary supplements have been implicated in drug-induced liver injury. Examples reported in the medical literature include certain green tea extracts, Garcinia cambogia, kratom, and other herbal products.  

The risk varies substantially between ingredients and formulations. 

5. Can vitamin B12 or vitamin D supplements damage the liver? 

For vitamin B12, there is no evidence that normal or high physiologic doses cause liver injury. LiverTox classifies vitamin B12 and most other B vitamins as unlikely causes of clinically apparent liver injury, although high-dose niacin is a separate exception within the B-vitamin group. 8 

For vitamin D, even excessive intake is not generally associated with liver injury or jaundice. Vitamin D toxicity instead mainly causes problems related to excessive calcium levels, which can affect the kidneys and other organs. 9 

So, vitamin B12 and vitamin D should not be treated as equivalent to the turmeric-related liver concern discussed in this article. 

References 

1. Halegoua-DeMarzio, D., Navarro, V., Ahmad, J., Avula, B., Barnhart, H., Barritt, A. S., Bonkovsky, H. L., Fontana, R. J., Ghabril, M., Hoofnagle, J. H., Khan, I. A., Kleiner, D. E., Phillips, E., Stolz, A., & Vuppalanchi, R. (2023). Liver injury associated with turmeric—A growing problem: Ten cases from the Drug-Induced Liver Injury Network (DILIN). The American Journal of Medicine, 136(2), 200–206. https://doi.org/10.1016/j.amjmed.2022.09.026 

2. National Institute of Diabetes and Digestive and Kidney Diseases. (2025, June 16). Turmeric. LiverTox: Clinical and Research Information on Drug-Induced Liver Injury. National Library of Medicine. https://www.ncbi.nlm.nih.gov/books/NBK548561/ 

3. Papke, D. J., Jr., Viveiros, K., Zota, V., Gill, R. M., González, I. A., Misdraji, J., & Patil, D. T. (2025). Turmeric supplement-associated hepatitis: A clinicopathological series of 11 cases highlighting pan-lobular and zone 3 injury. Histopathology, 86(3), 410–422. https://doi.org/10.1111/his.15333 

4. Lombardi, N., Crescioli, G., Maggini, V., Ippoliti, I., Menniti-Ippolito, F., Gallo, E., Brilli, V., Lanzi, C., Mannaioni, G., Firenzuoli, F., & Vannacci, A. (2021). Acute liver injury following turmeric use in Tuscany: An analysis of the Italian Phytovigilance database and systematic review of case reports. British Journal of Clinical Pharmacology, 87(3), 741–753. https://doi.org/10.1111/bcp.14460 

5. Shoba, G., Joy, D., Joseph, T., Majeed, M., Rajendran, R., & Srinivas, P. S. S. R. (1998). Influence of piperine on the pharmacokinetics of curcumin in animals and human volunteers. Planta Medica, 64(4), 353–356. https://doi.org/10.1055/s-2006-957450 

6. National Center for Complementary and Integrative Health. (n.d.). Turmeric: Usefulness and safety. National Institutes of Health. https://www.nccih.nih.gov/health/turmeric 

7. Fontana, R. J., Liou, I., Reuben, A., Suzuki, A., Fiel, M. I., Lee, W., & Navarro, V. (2023). AASLD practice guidance on drug, herbal, and dietary supplement-induced liver injury. Hepatology, 77(3), 1036–1065. https://doi.org/10.1002/hep.32689 

8. National Institute of Diabetes and Digestive and Kidney Diseases. (2021, May 27). Vitamin B. LiverTox: Clinical and Research Information on Drug-Induced Liver Injury. National Library of Medicine. https://www.ncbi.nlm.nih.gov/books/NBK548710/ 

9. National Institute of Diabetes and Digestive and Kidney Diseases. (2021, May 27). Vitamin D. LiverTox: Clinical and Research Information on Drug-Induced Liver Injury. National Library of Medicine. https://www.ncbi.nlm.nih.gov/books/NBK548094/