Educational information, not medical advice — ask your doctor or midwife.
Leaf celery is a leafy form of celery grown for its strong-smelling leaves and thin stalks.
Cooks use it as a herb and a soup green. Its botanical name is Apium graveolens var. secalinum.
It is also sold as Chinese celery, cutting celery, soup celery or smallage. The stalks are hollow and fibrous. The taste is much stronger than the pale salad celery in supermarkets.
People use it mainly for flavour, in broths, stir-fries and stews. Folk use also pointed to digestion, fluid balance and joint aches. Long use in the kitchen and in folk medicine is not proof that it treats anything, and it is not proof that it is safe for everyone.
The honest verdict: leaf celery is a good food herb with almost no human trials behind its medicinal claims. The small amount of research that exists was done on celery seed extract, not the leaf. Celery is also a well-known food allergen, which matters more than any claimed benefit.
No one has shown that leaf celery treats a disease in people. The ideas about how it might work come from lab and animal work.
Celery holds phthalides, the compounds behind its smell. In animal studies, one of them (3-n-butylphthalide) relaxes blood vessel walls. Whether eating the leaves does this in a person is not established.
The leaves also hold apigenin and luteolin, two plant pigments. In cell studies, these damp down signals tied to inflammation. That is a test-tube finding, not a proven effect in the body.
Folk use calls celery a water pill (diuretic), meaning something that makes you pass more urine. The plant carries potassium and nitrates, and some animal work hints at a mild effect. Human trials on the leaf for this are lacking.
Celery also carries furanocoumarins. These are known to make skin burn faster in sunlight, which is a well-documented effect in people who handle large amounts of the plant.
Most people meet leaf celery as a fresh kitchen herb.
Common forms: - Fresh leaves and thin stalks, chopped into soups, stocks and stir-fries. - Dried leaf flakes, sold as a herb or inside stock powders. - Frozen chopped leaf.
- Fresh juice, pressed from stalks and leaves. - Celery seed, a spice from a related form of the plant. - Celery seed extract capsules, sold as a supplement.
- Celery seed essential oil, used in flavouring and perfume.
The leaf and the seed are not swaps for each other. Seed extracts are far more concentrated. Essential oil is strongest of all and is not a food.
Supplement labels often blur these names. Check which part of the plant a product is made from before you buy.
Celery in its wild, leafy form was known around the Mediterranean long before the thick salad stalk was bred. Greek and Roman writers described smallage, a bitter marsh plant, and used it in garlands and in cooking.
Leaf celery travelled to East Asia and became a staple kitchen herb there. Chinese cooks used it in soups and stir-fries for centuries. In Japan and Southeast Asia it filled a similar role.
Folk medicine in Europe listed celery as a herb for water retention and joint aches. Unani and Ayurvedic texts described ajmod, a related celery seed, for digestion and wind.
None of this was tested the way medicines are tested today. The records tell you what people believed and did, not what the plant does.
Call emergency services at once if, after eating celery, you get swelling of the lips, tongue or throat, a tight chest, wheezing, a widespread rash, or you feel faint. These are signs of anaphylaxis, a whole-body allergic reaction.
See a doctor soon if you get blistering or a burn-like rash on skin that touched the plant.
See a doctor rather than self-treating if you have swollen ankles, lasting gut symptoms, or blood pressure you are trying to control. Those need proper assessment.
In the United States, United Kingdom and European Union, leaf celery is an ordinary food vegetable and herb. In the EU and UK, celery must be declared as an allergen on food labels. Celery seed supplements are sold as food supplements and may not be marketed as treating any disease.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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