Anti-Inflammatory Diet Guide: Foods, Research, Meal Ideas

An "anti-inflammatory diet" is not one official plan. It is a name for an eating pattern built on vegetables, fruit, whole grains, beans, nuts, olive oil and fish, with fewer refined and highly processed foods. In practice it looks a lot like the Mediterranean diet. Trials of patterns like this have measured modest drops in blood markers of inflammation such as C-reactive protein (CRP). Whether those marker changes lead to better long-term health is less certain.

Key Takeaways

Inflammation is a normal protective process. Researchers study diet because inflammation that lasts a long time can damage healthy tissue.
No single "anti-inflammatory diet" has an agreed definition. Most versions emphasize plants, olive oil, nuts and fish and limit sweets, refined grains and processed meats.
A 2014 meta-analysis of 17 Mediterranean-diet trials (about 2,300 adults) found greater drops in CRP and interleukin-6 than on comparison diets, but the results varied widely between trials.
The Dietary Inflammatory Index scores diets on 45 food parameters. Most of the research using it is observational, and the strength of that evidence is limited.
Single foods and spices such as turmeric are not proven to have anti-inflammatory effects in people. The overall pattern is what has been tested.
A larger 2020 review of popular diets found no significant change in CRP at 6 months, so results depend on the diet and the study.

Evidence grade: Moderate. Meta-analyses of randomized trials show modest reductions in inflammatory blood markers with Mediterranean-type and other healthy eating patterns, but the trials vary widely, other reviews found no effect, and long-term evidence is mainly observational.

What Inflammation Is, and Why Diet Comes Up

Inflammation is the body's way of protecting tissues and helping them heal from an injury or infection. Short-term (acute) inflammation is helpful. The redness and swelling around a cut, for example, are signs of the body's defenses at work. When inflammation lasts too long, it can damage healthy tissue [1].

One common lab measure is C-reactive protein (CRP), which the liver makes in response to inflammation [1]. Diet researchers often track CRP and signaling molecules called cytokines, such as interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-α). These markers can be measured in short trials, which is why they appear so often in this research.

What People Mean by an Anti-Inflammatory Eating Pattern

The idea is best defined by the research tools used to study it.

The Dietary Inflammatory Index

In 2014, researchers at the University of South Carolina published the Dietary Inflammatory Index (DII). They screened about 6,500 studies and scored 1,943 of them on how 45 food components affected six inflammatory markers, including CRP and IL-6 [2]. A diet's score runs from strongly "pro-inflammatory" to strongly "anti-inflammatory." In their global reference data, the lowest score was -8.87, the highest +7.98, and the median +0.23 [2]. Components that score on the anti-inflammatory side include fiber, omega-3 fats, beta-carotene, flavonoids, vitamins C and E, tea, and spices such as turmeric, garlic and ginger. Saturated fat, trans fat, total fat, cholesterol and total calories score on the pro-inflammatory side [2].

Mediterranean-type patterns

Most diet trials that measured inflammation tested a Mediterranean pattern or something similar: lots of vegetables, fruit, whole grains, beans and nuts, with olive oil as the main fat and fish several times a week. Our Mediterranean diet guide covers that pattern and its servings in detail.

Foods Commonly Included, and Foods to Limit

Eat more often	Examples	What is known
Vegetables and fruit	Leafy greens, tomatoes, peppers, broccoli, berries, citrus	Core of every pattern tested in the CRP trials [3][4]
Whole grains and legumes	Oats, brown rice, farro, lentils, chickpeas, beans	Part of the Mediterranean, DASH and Nordic patterns pooled in trials [3][4]
Fatty fish	Salmon, sardines, mackerel, herring, tuna	Main food sources of the omega-3s EPA and DHA [6]
Nuts and seeds	Walnuts, flaxseed, chia seeds	Sources of the plant omega-3 ALA [6]
Olive oil	Extra-virgin olive oil for cooking and dressings	The main fat in Mediterranean trials [3]
Herbs and spices	Turmeric, ginger, garlic, oregano	Add flavor; evidence for health effects in people is limited [9][10]

Foods most versions limit are sweets and sugary drinks, refined grains, processed and red meats, and fried, highly processed snack foods. The DII does not ban foods. It reflects the overall balance of the diet [2].

What the Research Measured

Trials of whole eating patterns

Mediterranean diets. A 2014 meta-analysis pooled 17 randomized trials of at least 12 weeks with about 2,300 adults. Mediterranean diets lowered high-sensitivity CRP by about 0.98 mg/L and IL-6 by about 0.42 pg/mL more than comparison diets, and improved a measure of blood-vessel function [3]. Heterogeneity was high (I² of 91% for CRP), which means individual trials disagreed considerably [3].
Healthy dietary patterns generally. A 2016 meta-analysis of 17 randomized trials covered Mediterranean, Nordic, Tibetan and DASH patterns. It found a significant reduction in CRP but no significant changes in the other markers studied, including TNF-α and adiponectin [4].
Popular named diets. A 2020 network meta-analysis of 121 trials in nearly 22,000 adults found that none of the 14 named diets significantly improved CRP at 6 months [5].
Weight change is a factor. In a year-long trial of four popular diets, CRP decreases tracked weight loss, with no difference between diets [8]. So part of what looks like a diet effect on inflammation markers may reflect weight change.

Observational studies using the DII

A 2021 umbrella review pulled together 15 meta-analyses of the DII covering 38 health outcomes and more than 4.3 million people [7]. Higher (more pro-inflammatory) scores were statistically linked to 27 of the 38 outcomes. When the authors graded credibility, however, only one outcome reached the top "convincing" class, and most were rated suggestive, weak or showed no association [7]. These are associations from observational data. They cannot show that changing your score changes your health.

Omega-3 fats

Lab and human studies show that EPA and DHA from fish oil become part of the membranes of immune cells. They shift the signaling molecules those cells produce, including resolvins, which help inflammation wind down [11]. This is how omega-3s work at the cell level. It is not proof of a health benefit from eating more fish. Our article on omega-3 fatty acids covers food sources and intake in more depth.

What Is Not Established

An agreed definition. "Anti-inflammatory diet" is a descriptive term, not a standardized plan with set servings.
Single "anti-inflammatory foods." Claims about individual foods mostly come from cell or animal research. For turmeric, NCCIH says there is not enough evidence to conclude whether it or curcumin helps any health purpose [9]. Ginger research in people has often been of low quality [10].
Markers versus outcomes. A lower CRP in a 12-week trial is not the same as a proven long-term health benefit.
Effects on aging. Some articles promise that these foods "slow aging." The research summarized here measured blood markers and associations, not the rate of aging. For eating well as you get older, see nutrition for healthy aging.

Practical Meal Ideas

Breakfast: Oats cooked in milk or a fortified soy drink, topped with berries and ground flaxseed. Or plain yogurt with walnuts and fruit.
Lunch: A big salad of leafy greens, chickpeas, tomatoes, cucumber and olives with an olive oil and lemon dressing, plus whole-grain bread.
Dinner: Baked salmon or sardines with roasted vegetables and brown rice or farro. Or a lentil and vegetable stew seasoned with garlic, ginger and turmeric.
Snacks: A handful of nuts, fruit, hummus with raw vegetables.
Drinks: Water, unsweetened tea or coffee rather than sugary drinks.
Swaps: Olive oil for butter, whole grains for white bread, and beans or fish in place of processed meats a few times a week.

Start with one or two swaps a week rather than overhauling everything at once. Plan meals and shop from a list built around produce, beans, whole grains, nuts and fish.

Safety and Interactions

Omega-3 supplements. The FDA recommends no more than 5 g a day of EPA and DHA combined from supplements. Side effects are usually mild, such as heartburn, nausea, an unpleasant taste or diarrhea. High doses may cause bleeding problems with warfarin (Coumadin) or other anticoagulants [6]. Talk to your doctor or pharmacist if you take a blood thinner.
Leafy greens and warfarin. Green leafy vegetables are rich in vitamin K. If you take warfarin, keep your vitamin K intake about the same from day to day, and talk to your doctor before making big changes [12].
Turmeric supplements. Conventional turmeric is likely safe in recommended amounts for 2 to 3 months. It can cause stomach upset, reflux or diarrhea, and liver damage has been reported with high-bioavailability curcumin products [9]. Using turmeric as a cooking spice is different from taking a concentrated supplement. See turmeric side effects.
Ginger supplements. These can cause abdominal discomfort, heartburn or diarrhea. If you take any medicine, talk to your healthcare provider before using ginger or other herbal products [10].
If you have a medical condition or take prescription medicine, talk to your healthcare provider or a registered dietitian before making major diet changes.

Frequently Asked Questions

What is an anti-inflammatory diet?

It is an eating pattern that emphasizes vegetables, fruit, whole grains, beans, nuts, olive oil and fish and limits sweets, refined grains and processed meats. There is no single official version. Most research has tested Mediterranean-type patterns [3][4].

What foods are considered anti-inflammatory?

Researchers score foods with tools like the Dietary Inflammatory Index, which rates 45 food components by their effects on inflammatory markers [2]. Fiber, omega-3 fats, flavonoids, tea and spices such as turmeric and ginger score on the "anti-inflammatory" side. Saturated and trans fats score on the "pro-inflammatory" side [2]. Trial evidence in people comes from whole eating patterns, not single foods.

What foods should you avoid on an anti-inflammatory diet?

Most versions limit sugary foods and drinks, refined grains, processed and red meats, and fried, highly processed snacks. In the Dietary Inflammatory Index, saturated fat, trans fat and excess calories push a diet's score toward the pro-inflammatory end [2]. Nothing has to be banned. The overall pattern is what counts.

How long does it take to see a change in inflammation markers?

The trials pooled in the 2014 Mediterranean meta-analysis lasted at least 12 weeks [3]. Results varied widely, and some reviews found no significant change in CRP at 6 months [5].

Is turmeric anti-inflammatory?

Curcumin, a compound in turmeric, is widely studied. NCCIH says there is not yet enough evidence to conclude whether turmeric or curcumin is beneficial for any health purpose [9].

Can an anti-inflammatory diet help with aging?

Studies have measured blood markers and associations, not aging itself. A healthy eating pattern supports overall nutrition at every age, but claims that specific foods slow aging have not been shown in people.

Sources

Disclosure: OPA Nutrition sells supplements, including products mentioned in this article. This content is for education only and is not medical advice. Statements about dietary supplements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. Talk to your healthcare provider before using any supplement, especially if you take medication or have a medical condition.

Written and reviewed by Michael Gonzales, Founder, OPA Nutrition · Last reviewed: October 17, 2026 · How OPA researches and writes

Anti-Inflammatory Diet Guide: Foods to Eat and Limit

Key Takeaways

What Inflammation Is, and Why Diet Comes Up