Dill weed is used primarily as a culinary herb to add a bright, slightly sweet flavor to fish, potatoes, yogurt-based dishes, and pickles. Beyond the kitchen, it has a long history in traditional medicine as a digestive aid, and modern research points to additional properties including antimicrobial and blood-sugar-lowering effects.
Cooking With Dill Weed
Dill weed refers to the feathery green leaves of the dill plant, as opposed to dill seed, which has a stronger, more concentrated flavor. The leaves taste slightly sweet with a grassy, anise-like quality that works well in both cold and warm dishes. It pairs naturally with fish (especially salmon), cucumbers, potatoes, beets, carrots, yogurt, rice, and tomatoes. If you’ve ever had tzatziki, gravlax, or a classic dill pickle, you already know the flavor.
It also complements other herbs well. Basil, garlic, and parsley are its most common partners, while cumin, ginger, and turmeric work alongside it in spice blends across Middle Eastern and South Asian cuisines. Scandinavian, Eastern European, and Mediterranean cooking all lean heavily on fresh dill.
One important cooking tip: fresh dill loses most of its flavor when exposed to high heat for more than a few minutes. Add it at the end of cooking, stir it into cold sauces, or use it as a finishing garnish. Dried dill is more heat-stable but significantly milder, so you’ll need roughly three times as much to match the flavor of fresh.
Nutritional Value
Fresh dill weed is surprisingly nutrient-dense for an herb. Per 100 grams, it delivers about 66 mg of vitamin C (roughly 70% of a typical daily target) and 1,040 micrograms of retinol equivalents, a form of vitamin A important for eye health and immune function. It also provides 1.9 mg of iron and 0.6 mg of manganese.
Of course, you’re rarely eating 100 grams of dill in a sitting. A generous tablespoon of fresh chopped dill weighs around 1 gram, so the practical contribution from a single serving is small. Where dill makes a real nutritional difference is when you use it regularly and generously, as many Mediterranean and Middle Eastern diets do, folding handfuls into salads, soups, and grain dishes.
Digestive Aid
Dill’s oldest and most established medicinal use is for digestive discomfort. It has been used for centuries to treat bloating, gas, intestinal spasms, and stomach pain. The essential oil in dill works as both a carminative (meaning it helps expel trapped gas) and an antispasmodic (meaning it relaxes the smooth muscle of the intestinal wall). Those two actions together explain why dill water, sometimes called “gripe water,” has been a traditional remedy for infant colic across many cultures.
A randomized, double-blind trial published in the Journal of Herbal Medicine tested dill essential oil on patients experiencing retained intestinal gas and pain after cesarean surgery. Researchers found that the oil’s antispasmodic and anti-inflammatory effects helped reduce gas intensity and discomfort compared to placebo. Animal studies support these findings, showing that dill extracts relax contractions triggered by various irritants in the gut, lending credibility to its centuries-old reputation as a stomach-settling herb.
Blood Sugar and Cholesterol Effects
A growing body of research, mostly in animal models but with some human data, suggests that dill extracts can lower blood sugar and improve cholesterol profiles. A review published in the Journal of Tropical Medicine compiled findings from multiple studies and found a consistent pattern: dill reduced fasting blood glucose, triglycerides, total cholesterol, and LDL (“bad”) cholesterol while raising HDL (“good”) cholesterol in diabetic models.
In one human study, administration of dill powder to people with type 2 diabetes reduced fasting blood glucose and improved insulin resistance along with lipid profiles. Another study combining dill with aerobic exercise over four weeks also showed blood-sugar-lowering effects. Not every study found significant glucose changes, though. Results varied depending on the form of dill used (seed extract, leaf extract, essential oil, or whole powder), the dose, and the duration of treatment.
This is worth knowing but not worth self-treating with. The doses used in these studies were concentrated extracts far beyond what you’d get from sprinkling dill on your dinner. If you take diabetes medication, the potential blood-sugar-lowering effect is something to be aware of rather than something to rely on.
Antimicrobial Properties
Dill weed essential oil has demonstrated the ability to inhibit the growth of certain harmful bacteria. Research published in the journal Molecules tested dill weed oil against Campylobacter species, bacteria commonly responsible for foodborne illness. The oil damaged the bacterial cell membrane, effectively killing both Campylobacter jejuni and Campylobacter coli in lab settings.
The main bioactive compound in dill leaf oil is alpha-phellandrene, which makes up roughly 63% of the oil from the leaves. This compound, along with smaller amounts of other volatile oils, is responsible for both the herb’s distinctive aroma and its antimicrobial activity. These findings are still largely limited to laboratory studies, so dill isn’t a substitute for food safety practices, but they help explain why dill and other aromatic herbs have historically been used in food preservation, particularly in pickling and fermenting.
Drug Interactions Worth Knowing
Dill can act as a mild diuretic, meaning it encourages your body to excrete more water. For most people this is harmless, but if you take lithium, it matters. Because lithium levels in the blood are sensitive to hydration status, anything that increases water loss can cause lithium to accumulate to potentially dangerous concentrations. If you’re on lithium and consume dill regularly or in large amounts (concentrated teas, supplements, or essential oil), your dose may need adjustment.
How to Store Fresh Dill
Fresh dill is notoriously short-lived. According to Purdue Extension, it lasts only about two days in the refrigerator, even under ideal conditions. Your two best storage options are wrapping the stems in a damp paper towel inside a plastic bag, or standing the stems upright in a glass of water like cut flowers and loosely covering the tops. Either way, plan to use it quickly.
For longer storage, freezing works better than drying. Chop the fronds and freeze them in ice cube trays with a little water or olive oil. Frozen dill retains more of its flavor than dried, which loses the bright, grassy notes and keeps mainly the earthy ones. If you do use dried dill, store it in an airtight container away from heat and light, where it will hold reasonable flavor for about four to six months.