Turmeric: Benefits, Uses, and What Research Says
Turmeric is a popular spice known for its curcumin content. Learn what research says about its benefits, inflammation, joint health, absorption, daily use and possible side effects.
Key takeaways
- Turmeric comes from the rhizome of the plant Curcuma longa.
- Curcumin is one of the main compounds studied in turmeric.
- Some of the most promising research focuses on inflammation and certain types of joint pain.
- Curcumin from turmeric is poorly absorbed by the body.
- Culinary turmeric and concentrated turmeric supplements are not equivalent.
In this article
- What is turmeric and where does it come from?
- What does turmeric contain?
- What benefits of turmeric have been studied?
- What is the connection between turmeric and inflammation?
- Can turmeric help with joint pain?
- What effects may turmeric have on digestion?
- What other effects of turmeric are being studied?
- Why is turmeric often combined with black pepper?
- How can we use turmeric in food?
- How much turmeric can we consume?
- What is the difference between culinary turmeric and supplements?
- Can turmeric cause side effects or interact with medications?
- Frequently asked questions
- Final thoughts
Turmeric is a yellow-orange spice made from the rhizome of the plant Curcuma longa. It has been used for centuries in Asian cooking and has become increasingly popular as an ingredient in supplements.
Researchers are particularly interested in curcuminoids, natural compounds found in turmeric. The best known of these is curcumin.
Turmeric can easily be included in an everyday diet, but it is important to distinguish between the amounts used as a culinary spice and the concentrated extracts found in supplements.
What is turmeric and where does it come from?
Turmeric comes from the plant Curcuma longa, which belongs to the same botanical family as ginger.
The part of the plant that is used is the rhizome, an underground stem that resembles a root. It can be used fresh or dried and ground into the yellow-orange powder commonly known as turmeric.
The plant is native to South Asia and is widely cultivated in India and other tropical regions.
Turmeric has a long history of use in cooking, particularly in curry and spice blends, as well as in traditional medical systems in Asia.
Today, it is available as:
- fresh turmeric rhizome;
- turmeric powder;
- teas and drinks;
- extracts;
- supplements.
What does turmeric contain?
Turmeric contains many natural plant compounds.
The best known are curcuminoids, pigments that contribute to its characteristic color.
The main curcuminoid is curcumin.
Curcumin has been studied particularly for its effects on inflammatory and oxidative processes in the body.
However, culinary turmeric contains only a certain proportion of curcuminoids. Eating a teaspoon of turmeric is therefore not equivalent to taking a concentrated curcumin extract.
This distinction matters when interpreting research because many studies use concentrated and standardized extracts, not the amount of turmeric normally used in food.
What benefits of turmeric have been studied?
Turmeric and its compounds have been investigated for a wide range of possible health effects.
Research has examined their potential role in:
- inflammatory processes;
- joint pain and joint function;
- digestion;
- glucose metabolism;
- cholesterol and triglycerides;
- cardiovascular health;
- oxidative stress.
However, the evidence is not equally strong for all of these possible benefits.
Some of the more consistent human research has focused on joint pain and function, particularly in people with osteoarthritis.
For many other proposed uses, studies remain limited, use very different products, or have not produced sufficiently consistent results.
Turmeric can be part of a varied diet, but it should not be presented as a treatment for a long list of diseases.
What is the connection between turmeric and inflammation?
Inflammation is a normal response of the body to infection, injury, and other forms of stress.
Problems can arise when certain inflammatory processes remain active for long periods.
Curcumin and other compounds in turmeric have been studied for their ability to influence some of the biological pathways involved in inflammation.
In some clinical studies, turmeric or curcumin supplements have been associated with changes in certain inflammatory markers.
However, there is an important difference between changing a laboratory marker and treating an inflammatory disease.
It is therefore more accurate to say that turmeric contains compounds with studied anti-inflammatory properties than to say that culinary turmeric treats inflammation or inflammatory diseases.
Can turmeric help with joint pain?
Joint health is one of the areas where turmeric has attracted the most clinical interest.
Several studies have investigated turmeric or curcumin extracts in people with osteoarthritis, particularly knee osteoarthritis.
Some research suggests that these products may modestly reduce pain and improve joint function.
However, the results need to be interpreted carefully.
Studies have used different extracts and doses, and many have been relatively small or short in duration.
Another important distinction is that these studies usually examined supplements or concentrated extracts, not the amount of turmeric normally used to season food.
We therefore cannot assume that adding turmeric to a meal will produce the same effects observed with concentrated extracts.
What effects may turmeric have on digestion?
Turmeric has traditionally been used for various digestive complaints, and its effects on the digestive system are still being studied.
One area of interest is its possible influence on the production and release of bile, a fluid produced by the liver that helps digest fats.
Researchers have also investigated turmeric for indigestion and other gastrointestinal symptoms.
However, the evidence is not consistent enough to consider turmeric a general treatment for digestive problems.
Large amounts or concentrated supplements may themselves cause digestive symptoms, including:
- nausea;
- abdominal discomfort;
- acid reflux;
- diarrhea.
Turmeric used in ordinary culinary amounts is different from taking a concentrated extract.
What other effects of turmeric are being studied?
Turmeric and curcumin are being researched in many different areas.
Studies have examined possible effects on:
- blood glucose;
- cholesterol;
- triglycerides;
- cardiovascular health;
- liver health;
- cognitive function;
- mood;
- oxidative stress.
Some results are interesting, but the evidence is not yet clear enough for broad recommendations.
One challenge is that studies use very different products: ordinary turmeric, isolated curcumin, concentrated extracts, or specially formulated products designed to increase absorption.
A result obtained with one specific extract therefore cannot automatically be applied to culinary turmeric or to every supplement on the market.
Why is turmeric often combined with black pepper?
Curcumin from turmeric is poorly absorbed when consumed on its own.
Some curcumin is absorbed in the intestine, but much of it is rapidly metabolized and eliminated.
For this reason, researchers and supplement manufacturers have developed different ways to increase its absorption.
One of the best-known combinations is turmeric + black pepper.
Black pepper contains piperine, a compound that can increase the absorption of curcumin.
Curcumin is also fat-soluble, so eating turmeric with some dietary fat may help absorption.
In food, turmeric can be combined with black pepper and fat sources such as:
- olive oil;
- avocado;
- nuts;
- seeds.
However, concentrated piperine formulas used in supplements are not equivalent to adding a little black pepper to food.
Concentrated piperine can also affect how the body processes certain medications.
How can we use turmeric in food?
Turmeric has a warm, slightly bitter, earthy flavor and can be used in many dishes beyond curry.
It can be added to:
- soups;
- rice;
- lentils;
- chickpeas;
- roasted vegetables;
- stews;
- eggs;
- sauces;
- marinades;
- smoothies;
- tea;
- drinks such as golden milk.
Turmeric can be used fresh or as a powder.
In savory dishes, it pairs well with black pepper, ginger, garlic, cumin, and different oils.
There is no need to use very large amounts. Used regularly as an ingredient, turmeric can add flavor, color, and plant compounds to a varied diet.
How much turmeric can we consume?
There is no official recommended daily intake for culinary turmeric.
Unlike vitamins and minerals, turmeric does not have a daily requirement that needs to be reached.
It can be used regularly as a spice according to the dish and personal preference. Culinary amounts are generally small and can be spread across different meals.
There is no need to consume large quantities.
More turmeric does not automatically mean more benefits, and effects seen in studies using concentrated extracts cannot simply be reproduced by adding more spice to food.
What is the difference between culinary turmeric and supplements?
The main difference is concentration.
Turmeric powder used in cooking naturally contains curcuminoids, volatile oils, and many other plant compounds.
Supplements may contain very different ingredients and concentrations.
| Product | What it may contain |
|---|---|
| Culinary turmeric powder | Whole powdered turmeric with naturally occurring curcuminoids |
| Turmeric supplement | Turmeric powder or extract |
| Standardized turmeric extract | A specified concentration of curcuminoids |
| Curcumin supplement | Concentrated or isolated curcumin |
| Enhanced-absorption formula | Curcumin combined with piperine or other delivery systems |
Two products labeled “turmeric” can therefore provide very different amounts of curcuminoids.
This also matters when interpreting studies.
A benefit observed with a concentrated extract does not mean that the same quantity of active compounds can be obtained from a teaspoon of turmeric added to food.
When choosing a supplement, it is important to check what the product actually contains, rather than looking only at the number of milligrams printed on the front of the package.
Can turmeric cause side effects or interact with medications?
Turmeric used in ordinary culinary amounts is generally well tolerated.
Potential problems are more relevant with supplements and concentrated extracts.
These may cause:
- nausea;
- acid reflux;
- abdominal discomfort;
- diarrhea;
- constipation.
Turmeric and curcumin may also influence how the body responds to certain medications.
Particular caution may be needed for people taking medicines that affect blood clotting, because concentrated supplements could increase bleeding risk.
People with gallbladder problems should also speak with a healthcare professional before using concentrated turmeric supplements.
Rare cases of liver injury have been reported in association with certain turmeric or curcumin supplements, particularly some products designed to increase absorption.
Culinary turmeric and concentrated supplements should therefore not be treated as if they have the same dose or safety profile.
People who take regular medications should speak with a doctor or pharmacist before starting a turmeric supplement.
Frequently asked questions
What is turmeric good for?
Turmeric is primarily used as a food and spice.
Its compounds are studied particularly for their effects on inflammatory processes, oxidative stress, and joint health.
Are turmeric and curcumin the same thing?
No.
Turmeric is the plant and the spice made from it.
Curcumin is one of the natural compounds found in turmeric.
Does turmeric help with inflammation?
Curcumin and other turmeric compounds can influence processes involved in inflammation.
Some studies have found favorable effects, but turmeric should not be considered a treatment for inflammatory diseases.
Why is turmeric combined with black pepper?
Black pepper contains piperine, which can increase curcumin absorption.
However, concentrated piperine formulas in supplements may also affect the metabolism of certain medications.
How much turmeric can we consume per day?
There is no official daily recommended amount for culinary turmeric.
It can be used regularly in normal culinary amounts according to the dish and personal preference.
Is culinary turmeric better than a turmeric supplement?
They are not equivalent.
Culinary turmeric is a spice, while supplements may provide much more concentrated amounts of turmeric extracts or curcuminoids.
Final thoughts
Turmeric is more than a colorful spice. It contains many plant compounds, with curcumin being the most extensively studied.
Some of the most interesting research focuses on inflammatory processes and joint health, but many studies have used concentrated extracts rather than turmeric consumed as food.
In everyday cooking, turmeric can be added to soups, rice, vegetables, eggs, lentils, and many other dishes. Combining it with a small amount of dietary fat and black pepper may help improve curcumin absorption.
Culinary turmeric and concentrated supplements are not the same thing. Benefits and risks associated with a specific extract should not automatically be attributed to the spice used in cooking.
References
- National Center for Complementary and Integrative Health. Turmeric: Usefulness and Safety. nccih.nih.gov
- Linus Pauling Institute, Oregon State University. Curcumin. lpi.oregonstate.edu
- LiverTox: Clinical and Research Information on Drug-Induced Liver Injury. Turmeric. National Institute of Diabetes and Digestive and Kidney Diseases. ncbi.nlm.nih.gov
- Memorial Sloan Kettering Cancer Center. Turmeric. mskcc.org
- BMJ — research and reviews on turmeric or curcumin and osteoarthritis.
- Cochrane Library — evidence reviews on interventions for osteoarthritis and pain.
- World Health Organization. WHO monographs on selected medicinal plants: Rhizoma Curcumae Longae.
Keep reading
Herbs & Supplements
What Are Adaptogens and Do They Actually Work?
What are adaptogens, and can they really help with stress, fatigue, or sleep? Explore five popular adaptogenic herbs, what scientific research says about their benefits, and the potential side effects and interactions to know before trying them.
Herbs & Supplements
Traditional Herbal Teas for Sleep: 4 Recipes, Preparation and Safety
Traditional herbal teas for sleep can combine chamomile, linden, lemon balm, mint, valerian, and Ivan chai into simple evening blends with clear proportions, preparation tips, and important safety guidance.
Herbs & Supplements
Best Herbs for Sleep: Active Compounds, Effects and What Research Says
Chamomile, valerian, lemon balm, passionflower, and lavender contain active compounds that may influence relaxation, GABA-related pathways, stress, and sleep, although clinical evidence varies by plant and preparation.