Za’atar is remarkably healthy. This Middle Eastern spice blend, typically made from dried thyme, oregano, sumac, sesame seeds, and salt, packs a dense concentration of antioxidants, anti-inflammatory compounds, and heart-friendly fats into a small serving. Each ingredient contributes distinct health benefits, making za’atar more nutritionally interesting than most spice blends you’ll find in a kitchen cabinet.
What’s Actually in Za’atar
Za’atar isn’t a single spice. It’s a blend, and the exact ratio varies by region and brand. The core ingredients are dried thyme (or a closely related wild herb called Syrian oregano), ground sumac berries, toasted sesame seeds, and salt. Some versions include marjoram, cumin, or coriander. Because of this variation, the nutritional profile shifts slightly depending on what you buy or make at home.
The sodium content is worth noting. Commercial za’atar contains roughly 45 mg of sodium per gram, which adds up quickly if you’re using it generously on bread dipped in olive oil (a classic way to eat it). For most people this is fine, but if you’re watching sodium intake closely, look for blends with less added salt or make your own.
Anti-Inflammatory Compounds in Thyme and Oregano
The herbs in za’atar are rich in two compounds called thymol and carvacrol. These aren’t just flavoring agents. They actively reduce inflammation in the body by dialing down several of the signaling pathways your immune system uses to trigger swelling, redness, and tissue damage. Thymol in particular lowers the production of inflammatory messenger molecules by blocking a key cellular switch that activates them. It also appears to protect lung tissue from acute injury and reduce neuroinflammation.
What makes this practical rather than theoretical is that these compounds are present in the amounts you’d actually consume through food. You don’t need supplement-level doses. The herbs in za’atar deliver thymol and carvacrol in concentrations that, consumed regularly as part of a varied diet, contribute to a lower overall inflammatory load.
Sumac Is an Antioxidant Powerhouse
Sumac, the tart red-purple powder in za’atar, is one of the most antioxidant-rich spices available. Its deep color comes from high concentrations of polyphenols, the same class of protective compounds found in berries, red wine, and green tea. These antioxidants neutralize free radicals, unstable molecules that damage cells and contribute to aging, cancer risk, and chronic disease over time.
Sumac also has specific effects on blood sugar. In a clinical trial with 41 people with type 2 diabetes, those who took 3 grams of sumac powder daily for three months saw their fasting blood glucose drop from an average of 150 to 131 mg/dL. Their HbA1c (a measure of long-term blood sugar control) fell from 6.75% to 6.18%. The placebo group showed no meaningful change. Three grams is roughly a teaspoon, an amount you could easily consume through regular za’atar use.
Sesame Seeds and Heart Health
The toasted sesame seeds in za’atar do more than add crunch. They contain unique compounds called lignans, particularly one called sesamin, that improve cholesterol levels in two ways. First, sesamin helps lower total cholesterol, LDL (“bad”) cholesterol, and triglycerides while raising HDL (“good”) cholesterol. Second, sesame seeds are rich in phytosterols, plant-based molecules that compete with cholesterol for absorption in your gut, effectively blocking some dietary cholesterol from entering your bloodstream.
Sesamin also promotes the production of nitric oxide in blood vessel walls, which causes them to relax and widen. This improves blood flow and supports healthy blood pressure. Combined with the anti-inflammatory effects of the herbs, za’atar’s overall profile is genuinely cardiovascular-friendly.
Effects on Mood and Brain Function
Carvacrol, one of the main compounds in za’atar’s herbs, crosses into the brain and influences neurotransmitter levels. Animal research published in Molecules found that carvacrol increased both dopamine and serotonin levels in the prefrontal cortex and hippocampus, two brain regions involved in mood regulation, learning, and memory. Dopamine drives motivation and feelings of reward. Serotonin stabilizes mood and promotes a sense of well-being.
The researchers described carvacrol as a “brain-active molecule” and suggested that regular consumption in low dietary amounts, the kind you’d get from cooking with herbs rather than taking supplements, could contribute to feelings of well-being over time. This doesn’t make za’atar a treatment for depression, but it does mean the blend has neurological effects beyond simple nutrition.
Gut Health and Antimicrobial Properties
Za’atar’s polyphenols inhibit the growth of a broad range of harmful bacteria, including E. coli, Salmonella, Listeria, H. pylori, and Staph aureus. The essential oils from Syrian oregano, a traditional za’atar herb, also show strong antifungal activity against species involved in intestinal infections.
At the same time, these compounds appear to support beneficial gut bacteria. Research on thymol and carvacrol showed they increased populations of Lactobacillus (a probiotic species) while reducing harmful bacteria and lowering markers of intestinal inflammation. This selective antimicrobial effect, killing pathogens while sparing friendly microbes, is one of the more compelling reasons to eat herbs and spices regularly rather than relying on bland diets.
How Za’atar Fits Into a Healthy Diet
Za’atar is a staple of Mediterranean and Middle Eastern cuisines, and its use aligns with one of the most well-studied dietary patterns on the planet. The Mediterranean diet’s health benefits, including lower rates of heart disease, diabetes, and cognitive decline, are partly attributed to the frequent use of herbs and spices like those found in za’atar. These ingredients add flavor that reduces the need for excess salt or sugar, while delivering bioactive compounds with every meal.
The most common ways to use za’atar are also some of the healthiest: mixed with olive oil as a dip for bread, sprinkled on roasted vegetables, stirred into yogurt, or rubbed onto chicken or fish before cooking. Pairing za’atar with olive oil isn’t just traditional, it’s functional. Many of its beneficial compounds are fat-soluble, so the oil helps your body absorb them more effectively.
One Risk Worth Knowing About
If you have a sesame allergy, za’atar is off-limits unless you find or make a sesame-free version. Sesame allergy is a recognized and growing public health concern, and reactions are typically IgE-mediated, meaning they can range from hives to anaphylaxis. Sesame can also cross-react with peanut and tree nut allergies, so if you have those allergies and haven’t been tested for sesame, use caution. Since January 2023, sesame is required to be labeled as an allergen on packaged foods in the United States, making it easier to identify in commercial za’atar blends.