Turmeric is a popular spice used in cooking and traditional medicine, but turmeric supplements are much more concentrated than the amount normally used in food. This raises an important question: What are the side effects of turmeric, and is turmeric safe to take every day?
For most adults, turmeric used in ordinary food amounts is generally well tolerated. However, higher doses, long-term supplementation, and highly absorbable curcumin products may cause unwanted effects or interact with medicines.
This guide explains the potential turmeric side effects, turmeric and curcumin safety concerns, possible medication interactions, and when you should speak with a healthcare professional.
Important: This article is for general educational purposes and does not replace advice from a doctor, pharmacist, or other qualified healthcare professional.
What Is Turmeric?
Turmeric is a plant known scientifically as Curcuma longa. Its underground stem, or rhizome, is commonly dried and ground into the bright yellow spice used in foods such as curries, soups, rice dishes, and beverages.
One of turmeric's best-known compounds is curcumin, which belongs to a group of substances called curcuminoids. Curcumin is responsible for much of turmeric's yellow color and has been extensively studied for its potential biological effects.
It is important to distinguish between turmeric as a food and concentrated turmeric or curcumin supplements. A small amount of turmeric added to a meal is very different from a capsule containing a concentrated extract.
The National Center for Complementary and Integrative Health notes that conventional oral turmeric or curcumin is likely safe for most adults when used in recommended amounts for limited periods, but side effects can occur.
Common Turmeric Side Effects
Although many people tolerate turmeric well, taking turmeric supplements can cause digestive symptoms. These effects may be more noticeable with higher doses.
1. Stomach Upset
One of the most commonly reported concerns is digestive discomfort.
Some people may experience:
Stomach pain or discomfort
Indigestion
Nausea
Vomiting
Bloating
Acid reflux
Diarrhea
Constipation
The National Center for Complementary and Integrative Health lists nausea, vomiting, acid reflux, stomach upset, diarrhea, and constipation among possible adverse effects of oral turmeric.
If you notice digestive problems after starting a turmeric supplement, consider discussing the product and dose with a healthcare professional rather than assuming that a higher dose is better.
2. Diarrhea
Turmeric can cause diarrhea in some people, particularly when taken in concentrated supplement form.
If diarrhea begins soon after starting turmeric and improves after stopping the supplement, turmeric may be contributing to the problem. However, diarrhea has many possible causes, including infections, food intolerance, medicines, and other health conditions.
Persistent or severe diarrhea should be assessed by a healthcare professional.
3. Nausea and Vomiting
Nausea is another possible turmeric side effect. Some people may find that concentrated curcumin products are harder to tolerate than turmeric used in food.
Taking a supplement with food may improve tolerance for some people, but this does not eliminate the possibility of side effects.
If nausea or vomiting is persistent, severe, or accompanied by other concerning symptoms, seek medical advice.
4. Acid Reflux and Heartburn
Turmeric may cause or worsen digestive discomfort in some individuals, including acid reflux.
If you already experience frequent heartburn, pay attention to whether your symptoms become worse after taking turmeric supplements.
Rather than increasing or changing your dose yourself, consider discussing the symptoms with a healthcare professional.
5. Allergic Skin Reactions
Turmeric can occasionally cause skin reactions.
Possible symptoms include:
Itching
Rash
Hives
Skin irritation
Memorial Sloan Kettering Cancer Center lists abdominal discomfort, skin rash, and hives among reported turmeric side effects.
A person who develops swelling of the lips, tongue, or throat, difficulty breathing, or other signs of a severe allergic reaction should seek emergency medical care.
Can Turmeric Cause Liver Problems?
This is one of the most important questions surrounding turmeric supplements.
The answer is yes, certain highly absorbable turmeric or curcumin supplements have been associated with liver injury in some people.
This does not mean that turmeric routinely damages the liver. The concern is particularly relevant to concentrated products designed to increase curcumin absorption.
The NCCIH states that highly bioavailable formulations of curcumin may harm the liver and that liver damage has been reported in some people who consumed these formulations.
Possible warning signs of liver injury can include:
Unusual tiredness
Loss of appetite
Nausea
Dark urine
Yellowing of the skin or eyes, known as jaundice
If these symptoms occur while taking a turmeric or curcumin supplement, stop using the product and contact a healthcare professional promptly.
This is one reason consumers should not assume that a supplement is automatically safe simply because it is marketed as “natural.”
Turmeric and Medication Interactions
Another important turmeric safety issue is its potential to interact with medicines.
Dietary supplements can change the effects of some medicines, potentially increasing side effects or reducing a medicine's effectiveness. The NCCIH recommends telling healthcare professionals about all supplements and medicines you use.
Turmeric and Blood Thinners
People taking anticoagulant or antiplatelet medicines should be particularly cautious about concentrated turmeric supplements.
Some evidence and clinical reports suggest turmeric may increase bleeding risk when combined with blood-thinning medicines. Memorial Sloan Kettering Cancer Center specifically advises caution with warfarin and other blood thinners.
If you take a blood thinner, do not start a concentrated turmeric or curcumin supplement without discussing it with your doctor or pharmacist.
Turmeric Before Surgery
Supplements can sometimes affect medicines or bleeding risk around the time of surgery.
For this reason, tell your surgeon, doctor, dentist, and anesthetic team about any turmeric or curcumin supplements you take.
The NCCIH notes that healthcare professionals may recommend stopping certain dietary supplements before surgery because supplements can affect medicines or increase risks such as bleeding.
Who Should Be Careful With Turmeric Supplements?
Turmeric supplements are not appropriate for everyone.
You should speak with a healthcare professional before taking concentrated turmeric or curcumin supplements if you:
Take prescription medicines
Take blood-thinning medication
Have liver problems
Have a history of kidney stones
Are pregnant
Are breastfeeding
Are preparing for surgery
Are receiving cancer treatment
Have a history of significant digestive problems
Take several dietary supplements at the same time
Memorial Sloan Kettering notes that turmeric supplementation may increase kidney-stone risk in people with a family history of kidney stones.
Turmeric During Pregnancy
Pregnant people should be particularly cautious with turmeric supplements.
While turmeric is commonly used as a culinary spice, much less is known about the safety of taking turmeric in amounts greater than those normally found in food during pregnancy.
The NCCIH states that turmeric supplements may be unsafe during pregnancy and that there is limited information about safety in breastfeeding.
If you are pregnant, trying to become pregnant, or breastfeeding, discuss concentrated turmeric or curcumin products with your healthcare professional before using them.
Is Turmeric Safe to Take Every Day?
There is no single daily turmeric dose that is appropriate for everyone.
Safety depends on factors such as:
The form of turmeric
The amount taken
How long it is used
The other ingredients in the product
A person's health conditions
Medicines being taken
How easily the curcumin is absorbed
The NCCIH states that conventionally formulated oral turmeric or curcumin is likely safe for most adults in recommended amounts for up to about two or three months. However, products designed to increase bioavailability require additional caution because liver injury has been reported with some formulations.
More is not necessarily better. A supplement containing a highly concentrated extract can behave very differently from turmeric used as a cooking spice.
Why Do Some Turmeric Supplements Contain Black Pepper?
You may notice that some curcumin supplements contain piperine, a compound found in black pepper.
Piperine can increase the absorption of curcumin. This may make a supplement more bioavailable, but increased absorption also means that the safety profile may differ from ordinary dietary turmeric.
The NCCIH specifically notes that curcumin products vary considerably and that some manufacturers combine curcumin with piperine to increase bioavailability. It also warns that highly bioavailable formulations may harm the liver in some people.
Therefore, consumers should not assume that a product with better absorption is automatically safer or more effective.
Turmeric Food vs. Turmeric Supplements
Using turmeric in normal cooking is generally different from taking a concentrated supplement.
For example, adding turmeric to a meal exposes you to a culinary amount of the spice. A supplement may contain a concentrated extract intended to deliver much larger amounts of specific compounds.
This distinction matters when discussing turmeric side effects.
A person who tolerates turmeric in food may still experience unwanted effects from a concentrated curcumin capsule.
The NCCIH also emphasizes that dietary supplements can vary in formulation and that manufacturers do not have to prove a supplement's safety and effectiveness before it reaches the market in the same way medicines are evaluated.
How to Use Turmeric More Safely
If you are considering a turmeric supplement, a few practical steps can reduce unnecessary risk.
First, read the label carefully. Look at the amount of turmeric or curcumin, additional ingredients, recommended serving size, and whether the product contains substances intended to increase absorption.
Second, avoid assuming that a “natural” label means the product cannot cause harm. Natural products can have side effects and can interact with medicines.
Third, tell your healthcare professional about all supplements you use. This is particularly important if you take prescription medicines or have a chronic health condition.
Finally, be cautious about products making dramatic claims such as curing diseases, rapidly reducing inflammation, detoxifying the liver, or replacing prescribed treatment. Evidence for many proposed turmeric benefits remains limited or inconsistent.
When Should You Stop Taking Turmeric?
You should seek medical advice if you develop concerning symptoms after starting a turmeric or curcumin supplement.
In particular, seek prompt medical attention if you develop possible signs of liver injury such as dark urine, jaundice, unusual fatigue, loss of appetite, or persistent nausea.
You should also contact a healthcare professional if you experience unusual bleeding, severe abdominal symptoms, persistent vomiting, or a significant allergic reaction.
Do not ignore new symptoms simply because a supplement is described as herbal or natural.
Frequently Asked Questions About Turmeric Side Effects
Does turmeric cause stomach problems?
It can. Oral turmeric may cause stomach upset, indigestion, nausea, acid reflux, diarrhea, constipation, or vomiting in some people, particularly when used in concentrated forms.
Can turmeric damage the liver?
Some highly bioavailable turmeric or curcumin supplements have been associated with liver injury. This appears to be an important safety concern with certain concentrated formulations rather than evidence that ordinary culinary turmeric routinely damages the liver.
Can I take turmeric with blood thinners?
You should speak with your doctor or pharmacist before taking concentrated turmeric supplements if you use blood-thinning medication. Turmeric may increase bleeding risk when combined with anticoagulants or antiplatelet medicines.
Is turmeric safe during pregnancy?
Safety information for turmeric supplements during pregnancy is limited, and the NCCIH states that turmeric supplements may be unsafe during pregnancy. Culinary amounts are a different matter. Speak with your healthcare professional before using concentrated supplements.
Is turmeric safe every day?
There is no universal answer. Conventional turmeric or curcumin formulations are likely safe for most adults for limited periods when used as recommended, but long-term use and highly bioavailable products require more caution.
The Bottom Line
Turmeric can be a useful culinary spice, but turmeric supplements are not risk-free.
The most common turmeric side effects involve the digestive system and may include stomach upset, nausea, vomiting, acid reflux, diarrhea, or constipation. Some people can also experience skin reactions.
More importantly, certain highly absorbable curcumin products have been associated with liver injury. Concentrated turmeric supplements may also interact with medicines, particularly blood thinners and some treatments used for serious medical conditions.
The safest approach is to distinguish ordinary culinary turmeric from concentrated supplements, follow product directions, avoid excessive doses, and discuss supplementation with a qualified healthcare professional when you take medicines, have an existing health condition, are pregnant or breastfeeding, or are preparing for surgery.
Natural does not automatically mean risk-free. Understanding the possible side effects and interactions can help you make a more informed decision about whether turmeric supplementation is appropriate for you.
Sources and Further Reading
National Center for Complementary and Integrative Health (NCCIH), Turmeric: Usefulness and Safety.
NCCIH, How Medications and Supplements Can Interact.
NCCIH, 5 Tips: What Consumers Need to Know About Dietary Supplements.
Memorial Sloan Kettering Cancer Center, Turmeric.