7 benefits of turmeric, according to scientists
Whether you’ve seen it at your grocery store, on a coffee shop’s latte menu, or in the social media feed of a wellness influencer, it can be difficult to suss out the actual benefits of turmeric, a spice made from the stems and roots of the tropical plant Curcuma longa Linne. Although it’s purported to treat everything from inflammation to arthritis and hypoglycemia—and even protect against degenerative brain diseases and cancer, human studies on the health effects of turmeric and its active chemical compound, curcumin, are quite limited, says Dr. Victoria J. Drake, PhD, manager of the Micronutrient Information Center at Oregon State University.
Because more randomized controlled trials are needed to determine whether turmeric might have real value in disease prevention or treatment, it’s a good idea to approach all claims with caution. Still interested in turmeric’s alleged superpowers? Read on to find out everything you need to know about it:
What is turmeric?
Used for centuries throughout India to add color and flavor to dishes and treat a variety of diseases, turmeric, which is a member of the ginger family, is known for its bright orange color, a product of fat-soluble pigments called curcuminoids. Curcumin is the principal curcuminoid in turmeric; it’s often extracted and studied on its own for its anti-inflammatory qualities. Because curcumin comes from turmeric, the two names are often used interchangeably.
Turmeric (which always includes curcumin), and cucumin itself are both sold in supplement form. While there have been numerous studies on each, turmeric contains other natural components—like essential oils— that may have specific health benefits.
7 benefits of turmeric
Commonly used in Ayurvedic medicine, a holistic medical system that dates back to ancient India, turmeric is now used in supplement form to treat various maladies, according to National Center for Complementary and Integrative Health.
But does it actually help? Here’s what the science says about the most common claims:
Claim 1: It reduces inflammation.
The facts: When a randomized group of 117 adults diagnosed with metabolic syndrome (a group of risk factors for heart disease) took about one gram of curcumin daily for eight weeks, they surfaced with lower levels of the proteins that contribute to inflammation, according to a 2016 controlled trial published in the journal Biomedicine and Pharmacotherapy. Curcumin appears to reduce inflammation in the body by suppressing a key protein in the inflammatory process, says Dr. Yufang Lin, MD, an integrative medicine specialist at Cleveland Clinic.
That’s a good thing, considering chronic inflammation—i.e., when the body’s normal response to injury or infection persists for months or years—can contribute to an increase in cortisol, the body’s main stress hormone; break down muscle mass; raise your risk of diabetes and cancer; and elevate your triglycerides, a type of fat found in the blood that contributes to heart disease.
That said, you should always consult a doctor before taking up a new supplement routine.
Claim 2: It has antioxidant properties.
The facts: Curcumin supplements appear to help suppress oxidative stress, or cell damage that occurs when the human body has an overabundance of free radicals (harmful, unpaired oxygen electrons) and not enough antioxidants (molecules that neutralize those unpaired electrons), according to a 2015 review and meta-analysis of seven studies published in the Journal of Functional Foods. While these findings are promising, larger studies are still needed for validation and to understand which diseases are caused by oxidative stress.
Claim 3: It promotes brain health.
The facts: When 40 adults with healthy brains took 90 mg of Theracurmin, a type of curcumin that is readily absorbed, twice a day for 18 months, their memories and ability to pay attention improved, according to a 2018 double-blind, placebo-controlled study published in The American Journal of Geriactric Psychiatry. The study authors speculate that curcumin’s anti-inflammatory benefits helped reduce plaque in areas of the brain related to mood and memory, but more research on a larger sample size is needed to confirm the findings.
Curcumin has also been shown to help maintain normal structure and functions of the brain, reducing the risk of Alzheimer’s disease, according to a 2018 research review published in the journal Neural Regeneration Research. Taken together, these two research sets show promise around turmeric and curcumin’s ability to help protect the brain, but again, definitive conclusions have yet to be made.
Claim 4: It helps prevent cancer.
The facts: Curcumin may be able to prevent certain types of cancer through its ability to both activate and inactivate certain genetic pathways, according to a 2014 review article published in BioMed Research International. What’s more, once cancer is detected, curcumin may be able to inhibit tumor growth by curbing tumor cell progression and enhancing immune response. It may even enhance chemotherapy treatments by helping the body absorb certain chemo drugs, according to a 2017 review article published in the Journal of Experimental Pharmacology.
As encouraging as these articles are, there’s a caveat: Most of the studies they reference involve animals, not humans; it’s hard to say definitively how curcumin may affect cancer cells in people, according to another review article published in Current Research: Integrative Medicine in 2018.
Claim 5: It improves the blood sugar response of people diagnosed with diabetes.
The facts: Supplementing with curcumin may trigger an enzyme in the liver that facilitates glucose metabolism, thereby helping control the blood sugar of people dealing with pre-diabetes or type 2 diabetes, according to a 2019 review focused on patients in Asia published in PLOS One.
What’s more, because of curcumin's ability to fight back against oxidative stress (which can contribute to diabetes) and help regulate fat metabolism (which may provoke imparied glucose response), curcumin supplements could therapeutic benefits for people diagnosed with type 2 diabetes, according to a 2019 literature review published in the journal Nutrients. However, researchers caution that more studies focused on varied populations and specific dosages are needed and caution that individual contributing factors (like health issues and/or medications) should be considered before doctors start recommending curcumin supplements in a clinical setting.
Claim 6: It lowers blood pressure.
The facts: Taking turmeric or curcumin for more than 12 weeks may create a modest improvement in systolic blood pressure, according to a 2019 meta-analysis of 11 studies comprised of 700 adults who were either healthy or diagnosed with diabetes, metabolic syndrome, obesity, or kidney disease.
Because chronically high blood pressure can increase your risk of cardiovascular disease and stroke, the benefits of turmeric could be impactful—but the authors of this analysis caution that because it included two different kinds of supplements (turmeric and curcumin itself), at varying doses (between 150 and 2400 mg per day), for fluctuating lengths of time, it's hard to pinpoint the magic combination. In other words, no one should consider substituting their blood pressure medication for turmeric just yet.
Claim 7: It eases arthritis symptoms.
The facts: Turmeric supplements can reduce inflammation, which in turn can help reduce pain linked to arthritis, says Dr. Rachel Carlton Abrams MD, family and integrative medicine practitioner, founder of the Santa Cruz Integrative Medicine Clinic and author of BodyWise: Discovering Your Body's Intelligence for Lifelong Health and Healing. While there’s also been a good deal of both human and animal studies on turmeric/curcumin’s effect on the pain, stiffness, and other symptoms of osteoarthritis, a common type of progressive arthritis caused by joint inflammation that's common among older adults, you shouldn’t forgo traditional pain meds for turmeric or cucumin without talking to your doctor until more research is done.
Turmeric and weight loss
Turmeric has been linked to improved insulin sensitivity, or the body's ability to sop up blood sugar effectively. In turn, this help prevent you from gaining excess belly fat—and may even help you lose it, according to Dr. Abrams.
It could be why adults with metabolic syndrome (a group of conditions like high blood sugar, increased blood pressure, body fat around the waist, and high cholesterol) saw reductions in body mass index (BMI), waist circumference, and leptin (a hormone that regulates body fat) after taking curcumin supplements for as few as four or up to 36 weeks, according to a 2019 review of 18 articles published in Frontiers in Pharmacology.
Although these results are promising, the jury is out on how much turmeric you’d have to take, and for exactly how long, to actually see results on the scale.
How to use turmeric
Turmeric is poorly absorbed by the gut. To help your body extract its benefits, combine the spice (or supplement) with black pepper and dietary fat, which aid in absorption, Dr. Lin says.
Whether you enjoy the taste of this slightly peppery, earthy spice, or simply want to reap its benefits, here are a few easy ways to consume it:
1. Turmeric spice
Turmeric is the dominant spice in curry (and the ingredient responsible for its golden color), but you can also add turmeric to soups, stews, and stir-fries. If you’re unfamiliar with it, start with one to two teaspoons for color and taste using recipes such as:
- Turmeric, honey and sesame marinated beef with warm brown rice salad
- Turmeric salmon with warm quinoa and kale salad
- Turmeric spiced rice bowl with stir-fried chicken and greens
- Mussels in coconut and turmeric broth
- Indian-spiced cauliflower and potato mash
2. Turmeric supplements
Walk into any health food or grocery store, and you’re likely to see a plethora of turmeric and curcumin supplements lining the shelves. Whichever brand you choose, try to find one that includes Bioperine® (the trademarked name of piperine, an active ingredient in black pepper that increases the bioavailability of other compounds such as turmeric) and take it with a fat source like coconut oil, olive oil, or a full meal, as Dr. Lin advises—that is, after talking to your doctor about the dose that’s safe for you.
3. Turmeric tea
While there isn’t much scientific evidence around the potency of turmeric tea, Dr. Abrams says it’s likely to be absorbed better than a supplement. Golden milk, a beverage that’s typically made with turmeric, coconut milk, a pinch of black pepper, and honey to taste, is another tasty way to drink your turmeric.
Side effects of turmeric
Although turmeric is a natural food that’s generally regarded as safe when taken at the doctor-recommended dosage that's right for you, there are some side effects to consider before adding it into your diet:
- Upset stomach: High doses of turmeric can sometimes cause diarrhea and general abdominal discomfort, Dr. Abrams says.
- Negative interactions with medications: Curcumin may increase the toxicity of certain medications like Sulfasalazine, which is used to treat certain autoimmune conditions as well as rheumatoid arthritis. So if you’re taking drugs for a chronic condition (i.e, on a regular basis) you should talk to your doctor before you start supplementing with turmeric or curcumin.
- Increased bleeding risk: Similar to aspirin, turmeric has anticoagulant tendencies, which means it may impair blood clotting and increase the risk of bleeding, Dr. Lin says—particularly when taken with a medication that also promotes bleeding, such as antiplatelets commonly used by patients with heart disease or stroke.
- Allergy: While rare, some may experience itchy skin or leg swelling from turmeric consumption, Dr. Lin says.
The upshot: Is turmeric good for you?
The breadth of research around the health benefits of turmeric and curcumin makes the ingredient look pretty good. And yet? Most experts agree that more large-scale, dose-specific human studies are needed before self-prescribing. If you're considering adding the ingredient to your diet, talk to your doctor—especially if you’re on medication to avoid potentially dangerous interactions.
At the end of the day, if you’re truly focused on becoming your healthiest self, consuming a varied diet that’s high in fruit, vegetables, and whole grains is generally regarded as the best approach—no supplements needed.
Jessica DiGiacinto is an associate editor at WW. A health and wellness writer and editor based out of New York, she’s contributed to Popsugar, Bulletproof 360, and Galvanized Media, among other media outlets.
This article was reviewed for accuracy in July 2021 by Michelle Cardel, PhD, MS, RD, director of global clinical research and nutrition at WW. The WW Science Team is a dedicated group of experts who ensure all our solutions are rooted in the best possible research.