What has a diuretic effect? Herbs, foods, and home remedies at a glance
Water retention in the body—medically known as edema—is a widespread phenomenon. Legs, ankles, and feet are especially often affected. If you're looking for natural ways to stimulate the kidneys to eliminate fluid, you'll find a whole range of herbs, foods, and drinks that have traditionally been said to have diuretic properties. This article gives you a factual overview—from botany to the kitchen. If you're already dealing with significant water retention, you should check in with a doctor first, as edema can have many causes that need proper medical evaluation. You’ll find more tips in our article on Water in the legs: causes, symptoms, and helpful tips.
What does "diuretic" mean?
Substances that are called diuretic stimulate the kidneys to produce more urine, which increases the elimination of water and certain dissolved substances through urine. Diuretics can be pharmaceutical medicines, but also plant-based foods or herbs. The way plant-based foods affect kidney function is usually milder than synthetic diuretics, but their use has been known in folk medicine for centuries.
Important: Plant-based foods and herbs that are traditionally said to have diuretic properties are not medicines. They don’t have approved health claims under EU law unless they’re registered as medicines. You can use them as part of a balanced diet, but they’re not a substitute for medical treatment.
Which herbs are traditionally considered diuretic?
In European folk medicine and monastic herbalism, various herbs have been described for centuries as supporting increased urination. Many of these are still found in herbal teas and botanical preparations today.
Nettle
Nettle (Urtica dioica) is one of the best-known herbs in European plant tradition. It grows wild almost everywhere in Central Europe and is rich in things like flavonoids, minerals, and silica. In folk medicine, nettle tea was traditionally used for water retention and to stimulate kidney activity. There’s a monograph from the European Medicines Agency (EMA) that recognizes the traditional use of nettle leaf extract for flushing the urinary tract—as long as you drink enough fluids. Our Nettle Walnut Elixir combines nettle with other time-honored ingredients inspired by Hildegard von Bingen.
Parsley
Parsley (Petroselinum crispum) isn’t just a well-known kitchen herb—it’s also traditionally known as a diuretic plant. Especially the root and seeds of parsley have been used for this in folk remedies. Parsley tea made from fresh or dried leaves is a popular home remedy. In Hildegard von Bingen’s tradition, parsley played an important role as a spice and kitchen plant. Our Organic Parsley Drink picks up on this tradition—also available as a Parsley Drink Cure.
Dandelion
Dandelion (Taraxacum officinale) is one of the most versatile wild plants in Central Europe. Both the leaves and roots of dandelion have traditionally been used to support urination. Dandelion contains things like bitter compounds, inulin, and flavonoids. The EMA recognizes the traditional use of dandelion herb and root for flushing the urinary tract. You can learn more about the many traditional uses of dandelion in our article on Dandelion Tincture.
Birch leaves
Birch leaves (Betula pendula) are also classic folk medicine herbs for water retention. They contain flavonoids, tannins, and saponins. Birch leaf tea is a traditional remedy that the EMA monograph recognizes for flushing the urinary tract. Birch leaves work well as a tea infusion and are found in many herbal blends.
Horsetail
Horsetail (Equisetum arvense) is one of the oldest plants on earth and a well-known herb in folk medicine. It’s especially rich in silica and flavonoids. There’s also an EMA monograph for horsetail that recognizes its traditional use for flushing the urinary tract.
Goldenrod
True goldenrod (Solidago virgaurea) is another time-honored herb linked to urinary tract issues and flushing therapies. It’s listed in the German Pharmacopoeia and is traditionally used to support urination. Goldenrod contains flavonoids, saponins, and essential oils.
Traditional herbs with diuretic properties at a glance
| Herb | Botanical name | Part used | Traditional use | EMA monograph |
|---|---|---|---|---|
| Nettle | Urtica dioica | Leaves | Flushing urinary tract | Yes |
| Dandelion | Taraxacum officinale | Herb, root | Flushing urinary tract | Yes |
| Birch leaves | Betula pendula | Leaves | Flushing urinary tract | Yes |
| Horsetail | Equisetum arvense | Herb | Flushing urinary tract | Yes |
| Goldenrod | Solidago virgaurea | Herb | Flushing urinary tract | Yes |
| Parsley | Petroselinum crispum | Leaves, root, seeds | Traditionally diuretic | Limited |
| Juniper berries | Juniperus communis | Berries | Traditionally diuretic | Yes |
Which foods have a diuretic effect?
Besides herbal teas, there are a number of foods that have traditionally been said to have diuretic properties. Many of them have a high water content and help flush the kidneys simply by increasing your fluid intake.
Cucumber
The cucumber (Cucumis sativus) is made up of over 95% water and contains potassium—a mineral that helps regulate fluid balance. In traditional medicine, cucumber is seen as a classic food for supporting drainage.
Asparagus
Asparagus (Asparagus officinalis) contains asparagine, an amino acid that’s traditionally thought to have a diuretic effect. Asparagus is also a classic seasonal veggie in German cuisine and was already known in ancient times as a diuretic food.
Watermelon
Watermelon is about 92% water and contains potassium and citrulline. In folk medicine, it’s said to have a mild diuretic effect. Especially in the warm summer months, it’s a popular natural way to boost your fluid intake.
Ginger
Ginger (Zingiber officinale) is a time-honored spice used in many cultures. It’s known for supporting digestion and stimulating circulation. Ginger tea is also considered mildly draining in some traditions.
Overview of Diuretic Foods
| Food | Key Ingredient | Traditional Property |
|---|---|---|
| Cucumber | Water, potassium | Classic folk remedy |
| Asparagus | Asparagine | Traditionally diuretic |
| Watermelon | Water, potassium, citrulline | Mildly diuretic |
| Celery | Phthalides, flavonoids | Traditionally diuretic |
| Artichoke | Cynarin, flavonoids | Traditionally supports bile flow and is diuretic |
| Ginger | Gingerols, shogaols | Mildly supports circulation |
| Parsley | Flavonoids, essential oils | Traditionally diuretic |
| Dandelion (leaves) | Bitter compounds, potassium | Traditionally diuretic |
What helps drain excess water from your legs?
Fluid retention in the legs often happens from standing or sitting for long periods, heat, hormonal changes, or—more seriously—due to heart, kidney, or liver issues. If you have pronounced or persistent swelling in your legs, you should definitely see a doctor. For a detailed overview of causes and what you can do, check out our article Water in the Legs: Causes, Symptoms & Helpful Tips.
Mild, situational water retention—like after a long flight or on hot summer days—can be managed by drinking more fluids, herbal teas, and eating foods rich in potassium. Moving around, elevating your legs, and alternating hot and cold showers are also classic folk remedies.
Diuretic Teas – Preparation and Use
Herbal teas are the most traditional way to use plants that support drainage. For a flushing therapy—like for mild urinary tract issues or water retention—it's essential to drink at least 2 liters of fluid a day. Without enough fluid, the draining effect of the herbs just doesn’t work.
| Herb | Preparation | Recommended Amount per Cup | Steeping Time |
|---|---|---|---|
| Nettle | Pour hot water over 1–2 tsp dried leaves | 1–2 g | 5–10 minutes |
| Dandelion | Pour hot water over 1–2 tsp dried herb or root | 1–2 g | 10 minutes |
| Birch leaves | Pour hot water over 2 tsp dried leaves | 2–3 g | 5–10 minutes |
| Horsetail | Pour hot water over 2 tsp dried herb | 2 g | 5–15 minutes |
| Parsley | Pour hot water over 1 tsp fresh or dried parsley | 1–2 g | 5 minutes |
What helps with water retention during pregnancy?
Fluid retention is common in pregnancy and usually nothing to worry about. But be careful: Many herbs with draining effects aren’t recommended or should only be used with caution during pregnancy. High doses of parsley seeds and oil, as well as juniper berries, are considered unsuitable during pregnancy. Horsetail and goldenrod should also only be used with medical advice.
In general: During pregnancy, always check with your doctor or midwife before using any herbal products or teas. Mild, non-medical swelling during pregnancy can usually be managed with enough movement, elevating your legs, and a balanced diet.
Draining in the Tradition of Hildegard of Bingen
In the writings of Hildegard of Bingen, you’ll find lots of descriptions of plants mentioned in connection with the kidneys and urination. Hildegard saw the kidneys as key organs for physical balance and described various herbs and foods that played a role in her concept. Parsley had a special place—it’s mentioned in detail in Hildegard’s work Physica and is one of the most traditional kitchen herbs in her teachings. Our Organic Parsley Drink follows this tradition.
If you’re interested in the basics of nutrition according to Hildegard of Bingen, check out our article Nutrition According to Hildegard of Bingen for a great introduction. It’s also worth taking a look at our Hildegard’s Autumn Cure—a seasonal program based on traditional teachings. You’ll find more herbal drinks and plant-based products in our herbal drinks collection.
Practical Tips for Mild Water Retention
| Measure | Description |
|---|---|
| Drink enough | At least 1.5–2 liters of water or unsweetened tea daily |
| Reduce table salt | High salt intake promotes water retention |
| Potassium-rich diet | Bananas, potatoes, legumes, leafy greens |
| Exercise | Regular physical activity helps the return of tissue fluid |
| Elevate your legs | Classic measure for leg edema |
| Herbal tea | Nettle, birch, or dandelion tea as a traditional companion |
| Contrast showers | Boost circulation in your legs |
When should you see a doctor?
Mild, short-term water retention—like after standing for a long time or on hot days—is usually harmless. Persistent, severe, or one-sided edema, edema that comes with pain, redness, or warmth, as well as water retention in your face or hands, should always be checked by a doctor. These can point to serious conditions of the heart, kidneys, or liver. Sudden edema during pregnancy also needs immediate medical attention.
If you're interested in a more mindful, natural diet, check out our article on foods for inflammation for more helpful background info, and our post on bitter herbs for a good overview of the variety of traditional plants.
